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02_basics.html
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02_basics.html
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@ -965,10 +965,10 @@
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<ol>
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<li><a href="#nutzung-der-konsole">Nutzung der Konsole</a></li>
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<li><a href="#primitive-datentypen">Primitive Datentypen</a></li>
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<li><a href="#">Nicht Primitive Datentypen</a></li>
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<li><a href="#">Operatoren</a></li>
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<li><a href="#">Bedingungen</a></li>
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<li><a href="#">Schleifen</a></li>
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<li><a href="#nicht-primitive-datentypen">Nicht Primitive Datentypen</a></li>
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<li><a href="#operatoren">Operatoren</a></li>
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<li><a href="#bedingungen">Bedingungen</a></li>
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<li><a href="#schleifen">Schleifen</a></li>
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<li><a href="#exceptions">Exceptions</a></li>
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</ol>
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<h2 id="nutzung-der-konsole">Nutzung der Konsole</h2>
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@ -1083,17 +1083,53 @@ vergleichbar mit einem char-Array.</p>
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<span class="n">String</span><span class="w"> </span><span class="n">concatString</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">"hello"</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="s">"World"</span><span class="p">;</span><span class="w"></span>
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<span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="s">"concatString: "</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">concatString</span><span class="p">);</span><span class="w"></span>
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</code></pre></div>
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<p>Methoden der Standardbibliothek:
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<div class="highlight"><pre><span></span><code><span class="n">myString</span><span class="p">.</span><span class="na">charAt</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns the char value at the specified index.</span><span class="w"></span>
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<span class="n">myString</span><span class="p">.</span><span class="na">indexOf</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns the index within this string of the first occurrence of the specified substring.</span><span class="w"></span>
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<span class="n">myString</span><span class="p">.</span><span class="na">substring</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns a string that is a substring of this string.</span><span class="w"></span>
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<span class="n">myString</span><span class="p">.</span><span class="na">equals</span><span class="p">();</span><span class="w"> </span><span class="c1">// Compares this string to the specified object.</span><span class="w"></span>
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<span class="n">myString</span><span class="p">.</span><span class="na">toLowerCase</span><span class="p">();</span><span class="w"> </span><span class="c1">// Converts all of the characters in this String to lower case.</span><span class="w"></span>
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<span class="n">myString</span><span class="p">.</span><span class="na">toUpperCase</span><span class="p">();</span><span class="w"> </span><span class="c1">// Converts all of the characters in this String to upper case.</span><span class="w"></span>
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<span class="n">myString</span><span class="p">.</span><span class="na">contains</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns true if and only if this string contains the specified sequence of char values.</span><span class="w"></span>
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<span class="n">myString</span><span class="p">.</span><span class="na">replaceAll</span><span class="p">();</span><span class="w"> </span><span class="c1">// Replaces each substring of this string that matches the given regular expression with the given replacement.</span><span class="w"></span>
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<span class="n">myString</span><span class="p">.</span><span class="na">compareTo</span><span class="p">();</span><span class="w"> </span><span class="c1">// Compares two strings lexicographically. The comparison is based on the Unicode value of each character in the strings.</span><span class="w"></span>
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</code></pre></div></p>
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<p>Methoden der Standardbibliothek:</p>
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<table>
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<thead>
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<tr>
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<th>Methode</th>
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<th>Beschreibung</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>myString.charAt()</td>
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<td>Returns the char value at the specified index.</td>
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</tr>
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<tr>
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<td>myString.indexOf()</td>
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<td>Returns the index within this string of the first occurrence of the specified substring.</td>
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</tr>
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<tr>
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<td>myString.substring()</td>
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<td>Returns a string that is a substring of this string.</td>
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</tr>
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<tr>
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<td>myString.equals()</td>
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<td>Compares this string to the specified object.</td>
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</tr>
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<tr>
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<td>myString.toLowerCase()</td>
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<td>Converts all of the characters in this String to lower case.</td>
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</tr>
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<tr>
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<td>myString.toUpperCase()</td>
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<td>Converts all of the characters in this String to upper case.</td>
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</tr>
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<tr>
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<td>myString.contains()</td>
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<td>Returns true if and only if this string contains the specified sequence of char values.</td>
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</tr>
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<tr>
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<td>myString.replaceAll()</td>
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<td>Replaces each substring of this string that matches the given regular expression with the given replacement.</td>
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</tr>
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<tr>
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<td>myString.compareTo()</td>
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<td>Compares two strings lexicographically. The comparison is based on the Unicode value of each character in the strings.</td>
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</tr>
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</tbody>
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</table>
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<h3 id="numeric-datatypes">Numeric Datatypes</h3>
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<p>Im Gegensatz zu den primitiven Datentypen werden hier "Wrapper" verwendet, um
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dynamisch mit den Werten arbeiten zu können. Das erlaubt auch die Erweiterung
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@ -1111,14 +1147,41 @@ um verschiedene Methoden in der Standardbibliothek.</p>
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<span class="n">Float</span><span class="w"> </span><span class="n">myFloat</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">float</span><span class="p">)</span><span class="mf">10.0</span><span class="p">;</span><span class="w"></span>
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<span class="n">myFloat</span><span class="p">.</span><span class="na">isNaN</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns true if this Float value is a Not-a-Number (NaN), false otherwise</span><span class="w"></span>
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</code></pre></div></p>
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<p>Funktionen für alle Numerischen Datentypen (Nicht Primitiv):
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<div class="highlight"><pre><span></span><code><span class="n">myNumber</span><span class="p">.</span><span class="na">compareTo</span><span class="p">();</span><span class="w"> </span><span class="c1">// Compares two Integer objects numerically.</span><span class="w"></span>
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<span class="n">myNumber</span><span class="p">.</span><span class="na">toString</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns a String object representing this Integer's value.</span><span class="w"></span>
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<span class="n">myNumber</span><span class="p">.</span><span class="na">intValue</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns the value of this Integer as an int.</span><span class="w"></span>
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<span class="n">myNumber</span><span class="p">.</span><span class="na">floatValue</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns the value of this Integer as a float after a widening primitive conversion.</span><span class="w"></span>
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<span class="n">myNumber</span><span class="p">.</span><span class="na">doubleValue</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns the value of this Integer as a double after a widening primitive conversion.</span><span class="w"></span>
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<span class="n">myNumber</span><span class="p">.</span><span class="na">shortValue</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns the value of this Integer as a short after a narrowing primitive conversion.</span><span class="w"></span>
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</code></pre></div></p>
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<p>Funktionen für alle Numerischen Datentypen (Nicht Primitiv):</p>
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<table>
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<thead>
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<tr>
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<th>Methode</th>
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<th>Beschreibung</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>myNumber.compareTo()</td>
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<td>Compares two Integer objects numerically.</td>
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</tr>
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<tr>
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<td>myNumber.toString()</td>
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<td>Returns a String object representing this Integer's value.</td>
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</tr>
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<tr>
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<td>myNumber.intValue()</td>
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<td>Returns the value of this Integer as an int.</td>
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</tr>
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<tr>
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<td>myNumber.floatValue()</td>
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<td>Returns the value of this Integer as a float after a widening primitive conversion.</td>
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</tr>
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<tr>
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<td>myNumber.doubleValue()</td>
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<td>Returns the value of this Integer as a double after a widening primitive conversion.</td>
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</tr>
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<tr>
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<td>myNumber.shortValue()</td>
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<td>Returns the value of this Integer as a short after a narrowing primitive conversion.</td>
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</tr>
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</tbody>
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</table>
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<h3 id="arrays">Arrays</h3>
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<p>Bei Arrays handelt es sich um Schleifen eines bestimmten Datentypen. Sie werden
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verwendet, um mehrere Werte in einer Variable zu speichern.</p>
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@ -1154,14 +1217,41 @@ verwendet, um mehrere Werte in einer Variable zu speichern.</p>
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<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="s">"]"</span><span class="p">);</span><span class="w"></span>
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<span class="p">}</span><span class="w"></span>
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</code></pre></div></p>
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<p>Methoden:
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<div class="highlight"><pre><span></span><code><span class="n">Arrays</span><span class="p">.</span><span class="na">toString</span><span class="p">(</span><span class="n">myArray</span><span class="p">);</span><span class="w"> </span><span class="c1">// a string representation of the object.</span><span class="w"></span>
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<span class="n">Arrays</span><span class="p">.</span><span class="na">copyOf</span><span class="p">(</span><span class="n">myArray</span><span class="p">,</span><span class="w"> </span><span class="mi">3</span><span class="p">);</span><span class="w"> </span><span class="c1">// Copies the specified array, truncating or padding with zeros (if necessary) so the copy has the specified length.</span><span class="w"></span>
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<span class="n">Arrays</span><span class="p">.</span><span class="na">compare</span><span class="p">(</span><span class="n">myArray</span><span class="p">,</span><span class="w"> </span><span class="n">myArray</span><span class="p">);</span><span class="w"> </span><span class="c1">// Compares two int arrays lexicographically.</span><span class="w"></span>
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<span class="n">Arrays</span><span class="p">.</span><span class="na">equals</span><span class="p">(</span><span class="n">myArray</span><span class="p">,</span><span class="w"> </span><span class="n">myArray</span><span class="p">);</span><span class="w"> </span><span class="c1">// Returns true if the two specified arrays of ints are equal to one another.</span><span class="w"></span>
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<span class="n">Arrays</span><span class="p">.</span><span class="na">sort</span><span class="p">(</span><span class="n">myArray</span><span class="p">);</span><span class="w"> </span><span class="c1">// Sorts the specified array into ascending numerical order</span><span class="w"></span>
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<span class="n">Arrays</span><span class="p">.</span><span class="na">fill</span><span class="p">(</span><span class="n">myArray</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">);</span><span class="w"> </span><span class="c1">// Assigns the specified int value to each element of the specified array of ints.</span><span class="w"></span>
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</code></pre></div></p>
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<p>Methoden:</p>
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<table>
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<thead>
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<tr>
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<th>Methode</th>
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<th>Beschreibung</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>Arrays.toString(Array a)</td>
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<td>a string representation of the object.</td>
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</tr>
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<tr>
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<td>Arrays.copyOf(Array a, int index)</td>
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<td>Copies the specified array, truncating or padding with zeros (if necessary) so the copy has the specified length.</td>
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</tr>
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<tr>
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<td>Arrays.compare(Array a, Array b)</td>
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<td>Compares two int arrays lexicographically.</td>
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</tr>
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<tr>
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<td>Arrays.equals(Array a, Array b)</td>
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<td>Returns true if the two specified arrays of ints are equal to one another.</td>
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</tr>
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<tr>
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<td>Arrays.sort(Array a)</td>
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<td>Sorts the specified array into ascending numerical order</td>
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</tr>
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<tr>
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<td>Arrays.fill(Array a, int number)</td>
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<td>Assigns the specified int value to each element of the specified array of ints.</td>
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</tr>
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</tbody>
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</table>
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<h2 id="operatoren">Operatoren</h2>
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<h3 id="arithmetic-operators">Arithmetic Operators</h3>
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<div class="highlight"><pre><span></span><code><span class="kt">int</span><span class="w"> </span><span class="n">calcAddition</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">20</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="mi">10</span><span class="p">;</span><span class="w"> </span><span class="c1">// = 30</span><span class="w"></span>
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@ -1347,7 +1437,7 @@ verwendet, um mehrere Werte in einer Variable zu speichern.</p>
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<small>
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Letztes Update:
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<span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-datetime">November 2, 2022 20:46:05</span>
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<span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-datetime">November 4, 2022 16:13:00</span>
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<br>
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Erstellt:
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66
02_basics.md
66
02_basics.md
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@ -3,10 +3,10 @@
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## Table of Contents
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1. [Nutzung der Konsole](#nutzung-der-konsole)
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2. [Primitive Datentypen](#primitive-datentypen)
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3. [Nicht Primitive Datentypen](#)
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4. [Operatoren](#)
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5. [Bedingungen](#)
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6. [Schleifen](#)
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3. [Nicht Primitive Datentypen](#nicht-primitive-datentypen)
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4. [Operatoren](#operatoren)
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5. [Bedingungen](#bedingungen)
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6. [Schleifen](#schleifen)
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7. [Exceptions](#exceptions)
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## Nutzung der Konsole
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@ -108,17 +108,18 @@ System.out.println("concatString: " + concatString);
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```
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Methoden der Standardbibliothek:
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||||
```java
|
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myString.charAt(); // Returns the char value at the specified index.
|
||||
myString.indexOf(); // Returns the index within this string of the first occurrence of the specified substring.
|
||||
myString.substring(); // Returns a string that is a substring of this string.
|
||||
myString.equals(); // Compares this string to the specified object.
|
||||
myString.toLowerCase(); // Converts all of the characters in this String to lower case.
|
||||
myString.toUpperCase(); // Converts all of the characters in this String to upper case.
|
||||
myString.contains(); // Returns true if and only if this string contains the specified sequence of char values.
|
||||
myString.replaceAll(); // Replaces each substring of this string that matches the given regular expression with the given replacement.
|
||||
myString.compareTo(); // Compares two strings lexicographically. The comparison is based on the Unicode value of each character in the strings.
|
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```
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| Methode | Beschreibung |
|
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|------------------------|-------------------------------------------------------------------------------------------------------------------------|
|
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| myString.charAt() | Returns the char value at the specified index. |
|
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| myString.indexOf() | Returns the index within this string of the first occurrence of the specified substring. |
|
||||
| myString.substring() | Returns a string that is a substring of this string. |
|
||||
| myString.equals() | Compares this string to the specified object. |
|
||||
| myString.toLowerCase() | Converts all of the characters in this String to lower case. |
|
||||
| myString.toUpperCase() | Converts all of the characters in this String to upper case. |
|
||||
| myString.contains() | Returns true if and only if this string contains the specified sequence of char values. |
|
||||
| myString.replaceAll() | Replaces each substring of this string that matches the given regular expression with the given replacement. |
|
||||
| myString.compareTo() | Compares two strings lexicographically. The comparison is based on the Unicode value of each character in the strings. |
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### Numeric Datatypes
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||||
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|
|
@ -144,14 +145,16 @@ myFloat.isNaN(); // Returns true if this Float value is a Not-a-Number (NaN), fa
|
|||
```
|
||||
|
||||
Funktionen für alle Numerischen Datentypen (Nicht Primitiv):
|
||||
```java
|
||||
myNumber.compareTo(); // Compares two Integer objects numerically.
|
||||
myNumber.toString(); // Returns a String object representing this Integer's value.
|
||||
myNumber.intValue(); // Returns the value of this Integer as an int.
|
||||
myNumber.floatValue(); // Returns the value of this Integer as a float after a widening primitive conversion.
|
||||
myNumber.doubleValue(); // Returns the value of this Integer as a double after a widening primitive conversion.
|
||||
myNumber.shortValue(); // Returns the value of this Integer as a short after a narrowing primitive conversion.
|
||||
```
|
||||
|
||||
| Methode | Beschreibung |
|
||||
|------------------------|---------------------------------------------------------------------------------------|
|
||||
| myNumber.compareTo() | Compares two Integer objects numerically. |
|
||||
| myNumber.toString() | Returns a String object representing this Integer's value. |
|
||||
| myNumber.intValue() | Returns the value of this Integer as an int. |
|
||||
| myNumber.floatValue() | Returns the value of this Integer as a float after a widening primitive conversion. |
|
||||
| myNumber.doubleValue() | Returns the value of this Integer as a double after a widening primitive conversion. |
|
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| myNumber.shortValue() | Returns the value of this Integer as a short after a narrowing primitive conversion. |
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### Arrays
|
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Bei Arrays handelt es sich um Schleifen eines bestimmten Datentypen. Sie werden
|
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|
|
@ -194,14 +197,15 @@ for(int row = 0; row < my2DArray.length; row++) {
|
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```
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|
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Methoden:
|
||||
```java
|
||||
Arrays.toString(myArray); // a string representation of the object.
|
||||
Arrays.copyOf(myArray, 3); // Copies the specified array, truncating or padding with zeros (if necessary) so the copy has the specified length.
|
||||
Arrays.compare(myArray, myArray); // Compares two int arrays lexicographically.
|
||||
Arrays.equals(myArray, myArray); // Returns true if the two specified arrays of ints are equal to one another.
|
||||
Arrays.sort(myArray); // Sorts the specified array into ascending numerical order
|
||||
Arrays.fill(myArray, 0); // Assigns the specified int value to each element of the specified array of ints.
|
||||
```
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|
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| Methode | Beschreibung |
|
||||
|-----------------------------------|-------------------------------------------------------------------------------------------------------------------|
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| Arrays.toString(Array a) | a string representation of the object. |
|
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| Arrays.copyOf(Array a, int index) | Copies the specified array, truncating or padding with zeros (if necessary) so the copy has the specified length. |
|
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| Arrays.compare(Array a, Array b) | Compares two int arrays lexicographically. |
|
||||
| Arrays.equals(Array a, Array b) | Returns true if the two specified arrays of ints are equal to one another. |
|
||||
| Arrays.sort(Array a) | Sorts the specified array into ascending numerical order |
|
||||
| Arrays.fill(Array a, int number) | Assigns the specified int value to each element of the specified array of ints. |
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## Operatoren
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|||
|
|
@ -364,6 +364,33 @@
|
|||
</ul>
|
||||
</nav>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#modifier" class="md-nav__link">
|
||||
Modifier
|
||||
</a>
|
||||
|
||||
<nav class="md-nav" aria-label="Modifier">
|
||||
<ul class="md-nav__list">
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#access-modifier" class="md-nav__link">
|
||||
Access-Modifier
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#non-access-modifier" class="md-nav__link">
|
||||
Non-Access-Modifier
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
</ul>
|
||||
</nav>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
|
|
@ -498,6 +525,33 @@
|
|||
</ul>
|
||||
</nav>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#modifier" class="md-nav__link">
|
||||
Modifier
|
||||
</a>
|
||||
|
||||
<nav class="md-nav" aria-label="Modifier">
|
||||
<ul class="md-nav__list">
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#access-modifier" class="md-nav__link">
|
||||
Access-Modifier
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#non-access-modifier" class="md-nav__link">
|
||||
Non-Access-Modifier
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
</ul>
|
||||
</nav>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
|
|
@ -566,6 +620,54 @@ The term simply means the creation of a new object, i.e. an instance, from a cla
|
|||
<div class="highlight"><pre><span></span><code><span class="n">String</span><span class="w"> </span><span class="n">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">String</span><span class="p">(</span><span class="s">"Thomas"</span><span class="p">);</span><span class="w"></span>
|
||||
</code></pre></div></p>
|
||||
</blockquote>
|
||||
<h2 id="modifier">Modifier</h2>
|
||||
<p>Quelle: <a href="https://www.w3schools.com/java/java_modifiers.asp">w3schools.com</a></p>
|
||||
<h3 id="access-modifier">Access-Modifier</h3>
|
||||
<table>
|
||||
<thead>
|
||||
<tr>
|
||||
<th>Modifier</th>
|
||||
<th>Beschreibung</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody>
|
||||
<tr>
|
||||
<td>public</td>
|
||||
<td>The code is accessible for all classes</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>private</td>
|
||||
<td>The code is only accessible within the declared class</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>protected</td>
|
||||
<td>The code is accessible in the same package and subclasses.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>default</td>
|
||||
<td>The code is only accessible in the same package. This is used when you don't specify a modifier.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<h3 id="non-access-modifier">Non-Access-Modifier</h3>
|
||||
<table>
|
||||
<thead>
|
||||
<tr>
|
||||
<th>Modifier</th>
|
||||
<th>Beschreibung</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody>
|
||||
<tr>
|
||||
<td>final</td>
|
||||
<td>The class cannot be inherited by other classes</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>abstract</td>
|
||||
<td>The class cannot be used to create objects (To access an abstract class, it must be inherited from another class.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<h2 id="1-einfache-objekte-und-veerbung">#1 Einfache Objekte und Veerbung</h2>
|
||||
<p><strong>Lernziele:</strong>
|
||||
* eine Klasse erzeugen
|
||||
|
|
@ -819,7 +921,7 @@ The term simply means the creation of a new object, i.e. an instance, from a cla
|
|||
<small>
|
||||
|
||||
Letztes Update:
|
||||
<span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-datetime">November 2, 2022 20:46:05</span>
|
||||
<span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-datetime">November 4, 2022 16:13:00</span>
|
||||
|
||||
<br>
|
||||
Erstellt:
|
||||
|
|
|
|||
|
|
@ -27,6 +27,26 @@ int nbr = 5;
|
|||
String name = new String("Thomas");
|
||||
```
|
||||
|
||||
## Modifier
|
||||
|
||||
Quelle: [w3schools.com](https://www.w3schools.com/java/java_modifiers.asp)
|
||||
|
||||
### Access-Modifier
|
||||
|
||||
| Modifier | Beschreibung |
|
||||
|-----------|--------------------------------------------------------------------------------------------------|
|
||||
| public | The code is accessible for all classes |
|
||||
| private | The code is only accessible within the declared class |
|
||||
| protected | The code is accessible in the same package and subclasses. |
|
||||
| default | The code is only accessible in the same package. This is used when you don't specify a modifier. |
|
||||
|
||||
### Non-Access-Modifier
|
||||
|
||||
| Modifier | Beschreibung |
|
||||
|----------|-------------------------------------------------------------------------------------------------------------------|
|
||||
| final | The class cannot be inherited by other classes |
|
||||
| abstract | The class cannot be used to create objects (To access an abstract class, it must be inherited from another class. |
|
||||
|
||||
|
||||
## #1 Einfache Objekte und Veerbung
|
||||
**Lernziele:**
|
||||
|
|
|
|||
|
|
@ -638,52 +638,14 @@
|
|||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
<span class="p">}</span><span class="w"></span>
|
||||
</code></pre></div>
|
||||
<h3 id="abstract-and-interface">Abstract and Interface</h3>
|
||||
<p><div class="highlight"><pre><span></span><code><span class="c1">// Regex.java</span><span class="w"></span>
|
||||
<span class="kd">public</span><span class="w"> </span><span class="kd">interface</span> <span class="nc">Regex</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="nf">concatStrings</span><span class="p">(</span><span class="n">String</span><span class="w"> </span><span class="n">left</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">right</span><span class="p">);</span><span class="w"></span>
|
||||
<span class="p">}</span><span class="w"></span>
|
||||
</code></pre></div>
|
||||
<div class="highlight"><pre><span></span><code><span class="c1">// Main.java</span><span class="w"></span>
|
||||
<span class="kd">abstract</span><span class="w"> </span><span class="kd">class</span> <span class="nc">Language</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">showLanguage</span><span class="p">()</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="s">"This text is presented to you by Java"</span><span class="p">);</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">abstract</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">sayHelloWorld</span><span class="p">();</span><span class="w"></span>
|
||||
<span class="p">}</span><span class="w"></span>
|
||||
|
||||
<span class="c1">// Main.java</span><span class="w"></span>
|
||||
<span class="kd">public</span><span class="w"> </span><span class="kd">class</span> <span class="nc">Main</span><span class="w"> </span><span class="kd">extends</span><span class="w"> </span><span class="n">Language</span><span class="w"> </span><span class="kd">implements</span><span class="w"> </span><span class="n">Regex</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">main</span><span class="p">(</span><span class="n">String</span><span class="o">[]</span><span class="w"> </span><span class="n">args</span><span class="p">)</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="c1">// Language myLanguage = new Language();</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="c1">// 'Language' is abstract; cannot be instantiated</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="n">Main</span><span class="w"> </span><span class="n">myObject</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">Main</span><span class="p">();</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">myObject</span><span class="p">.</span><span class="na">sayHelloWorld</span><span class="p">();</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">wortwitz</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">myObject</span><span class="p">.</span><span class="na">concatStrings</span><span class="p">(</span><span class="s">"du"</span><span class="p">,</span><span class="w"> </span><span class="s">"schlampe"</span><span class="p">);</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="n">wortwitz</span><span class="p">);</span><span class="w"> </span><span class="c1">// duschlampe</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="nd">@Override</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">sayHelloWorld</span><span class="p">()</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="s">"I refuse to say that!"</span><span class="p">);</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="nd">@Override</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="nf">concatStrings</span><span class="p">(</span><span class="n">String</span><span class="w"> </span><span class="n">left</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">right</span><span class="p">)</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">left</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">right</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
<span class="p">}</span><span class="w"></span>
|
||||
</code></pre></div>
|
||||
<div class="highlight"><pre><span></span><code><span class="c1">// SaveState.java</span><span class="w"></span>
|
||||
|
||||
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.InvalidParameterException</span><span class="p">;</span><span class="w"></span>
|
||||
|
||||
<span class="kd">public</span><span class="w"> </span><span class="kd">class</span> <span class="nc">SaveState</span><span class="o"><</span><span class="n">T</span><span class="o">></span><span class="w"> </span><span class="kd">implements</span><span class="w"> </span><span class="n">Comparable</span><span class="o"><</span><span class="n">SaveState</span><span class="o">></span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="n">T</span><span class="w"> </span><span class="n">saveEntry</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">saveID</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">staticSaveID</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="kd">private</span><span class="w"> </span><span class="n">T</span><span class="w"> </span><span class="n">saveEntry</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="kd">private</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">saveID</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="kd">private</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">staticSaveID</span><span class="p">;</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="c1">// constructor</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">SaveState</span><span class="p">(</span><span class="n">T</span><span class="w"> </span><span class="n">saveEntry</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">InvalidParameterException</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
|
|
@ -727,6 +689,44 @@
|
|||
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
<span class="p">}</span><span class="w"></span>
|
||||
</code></pre></div>
|
||||
<h3 id="abstract-and-interface">Abstract and Interface</h3>
|
||||
<p><div class="highlight"><pre><span></span><code><span class="c1">// Regex.java</span><span class="w"></span>
|
||||
<span class="kd">public</span><span class="w"> </span><span class="kd">interface</span> <span class="nc">Regex</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="nf">concatStrings</span><span class="p">(</span><span class="n">String</span><span class="w"> </span><span class="n">left</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">right</span><span class="p">);</span><span class="w"></span>
|
||||
<span class="p">}</span><span class="w"></span>
|
||||
</code></pre></div>
|
||||
<div class="highlight"><pre><span></span><code><span class="c1">// Main.java</span><span class="w"></span>
|
||||
<span class="kd">abstract</span><span class="w"> </span><span class="kd">class</span> <span class="nc">Language</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">showLanguage</span><span class="p">()</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="s">"This text is presented to you by Java"</span><span class="p">);</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">abstract</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">sayHelloWorld</span><span class="p">();</span><span class="w"></span>
|
||||
<span class="p">}</span><span class="w"></span>
|
||||
|
||||
<span class="c1">// Main.java</span><span class="w"></span>
|
||||
<span class="kd">public</span><span class="w"> </span><span class="kd">class</span> <span class="nc">Main</span><span class="w"> </span><span class="kd">extends</span><span class="w"> </span><span class="n">Language</span><span class="w"> </span><span class="kd">implements</span><span class="w"> </span><span class="n">Regex</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">main</span><span class="p">(</span><span class="n">String</span><span class="o">[]</span><span class="w"> </span><span class="n">args</span><span class="p">)</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="c1">// Language myLanguage = new Language();</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="c1">// 'Language' is abstract; cannot be instantiated</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="n">Main</span><span class="w"> </span><span class="n">myObject</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">Main</span><span class="p">();</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">myObject</span><span class="p">.</span><span class="na">sayHelloWorld</span><span class="p">();</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">wortwitz</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">myObject</span><span class="p">.</span><span class="na">concatStrings</span><span class="p">(</span><span class="s">"du"</span><span class="p">,</span><span class="w"> </span><span class="s">"schlampe"</span><span class="p">);</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="n">wortwitz</span><span class="p">);</span><span class="w"> </span><span class="c1">// duschlampe</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="nd">@Override</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">sayHelloWorld</span><span class="p">()</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="s">"I refuse to say that!"</span><span class="p">);</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="nd">@Override</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="nf">concatStrings</span><span class="p">(</span><span class="n">String</span><span class="w"> </span><span class="n">left</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">right</span><span class="p">)</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">left</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">right</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
<span class="p">}</span><span class="w"></span>
|
||||
</code></pre></div></p>
|
||||
<h2 id="collections">Collections</h2>
|
||||
<div class="highlight"><pre><span></span><code><span class="kn">import</span><span class="w"> </span><span class="nn">java.util.*</span><span class="p">;</span><span class="w"></span>
|
||||
|
|
@ -969,7 +969,7 @@
|
|||
<small>
|
||||
|
||||
Letztes Update:
|
||||
<span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-datetime">November 2, 2022 20:46:05</span>
|
||||
<span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-datetime">November 4, 2022 16:13:00</span>
|
||||
|
||||
<br>
|
||||
Erstellt:
|
||||
|
|
|
|||
|
|
@ -65,55 +65,15 @@ public class Main /*extends Language implements Regex*/ {
|
|||
}
|
||||
```
|
||||
|
||||
### Abstract and Interface
|
||||
```java
|
||||
// Regex.java
|
||||
public interface Regex {
|
||||
public String concatStrings(String left, String right);
|
||||
}
|
||||
```
|
||||
```java
|
||||
// Main.java
|
||||
abstract class Language {
|
||||
public void showLanguage() {
|
||||
System.out.println("This text is presented to you by Java");
|
||||
}
|
||||
public abstract void sayHelloWorld();
|
||||
}
|
||||
|
||||
// Main.java
|
||||
public class Main extends Language implements Regex {
|
||||
public static void main(String[] args) {
|
||||
// Language myLanguage = new Language();
|
||||
// 'Language' is abstract; cannot be instantiated
|
||||
|
||||
Main myObject = new Main();
|
||||
myObject.sayHelloWorld();
|
||||
|
||||
String wortwitz = myObject.concatStrings("du", "schlampe");
|
||||
System.out.println(wortwitz); // duschlampe
|
||||
}
|
||||
|
||||
@Override
|
||||
public void sayHelloWorld() {
|
||||
System.out.println("I refuse to say that!");
|
||||
}
|
||||
|
||||
@Override
|
||||
public String concatStrings(String left, String right) {
|
||||
return left + right;
|
||||
}
|
||||
}
|
||||
```
|
||||
```java
|
||||
// SaveState.java
|
||||
|
||||
import java.security.InvalidParameterException;
|
||||
|
||||
public class SaveState<T> implements Comparable<SaveState> {
|
||||
private T saveEntry;
|
||||
private int saveID = 0;
|
||||
private static int staticSaveID;
|
||||
private T saveEntry;
|
||||
private int saveID = 0;
|
||||
private static int staticSaveID;
|
||||
|
||||
// constructor
|
||||
SaveState(T saveEntry) throws InvalidParameterException {
|
||||
|
|
@ -159,6 +119,47 @@ public class SaveState<T> implements Comparable<SaveState> {
|
|||
}
|
||||
```
|
||||
|
||||
### Abstract and Interface
|
||||
```java
|
||||
// Regex.java
|
||||
public interface Regex {
|
||||
public String concatStrings(String left, String right);
|
||||
}
|
||||
```
|
||||
```java
|
||||
// Main.java
|
||||
abstract class Language {
|
||||
public void showLanguage() {
|
||||
System.out.println("This text is presented to you by Java");
|
||||
}
|
||||
public abstract void sayHelloWorld();
|
||||
}
|
||||
|
||||
// Main.java
|
||||
public class Main extends Language implements Regex {
|
||||
public static void main(String[] args) {
|
||||
// Language myLanguage = new Language();
|
||||
// 'Language' is abstract; cannot be instantiated
|
||||
|
||||
Main myObject = new Main();
|
||||
myObject.sayHelloWorld();
|
||||
|
||||
String wortwitz = myObject.concatStrings("du", "schlampe");
|
||||
System.out.println(wortwitz); // duschlampe
|
||||
}
|
||||
|
||||
@Override
|
||||
public void sayHelloWorld() {
|
||||
System.out.println("I refuse to say that!");
|
||||
}
|
||||
|
||||
@Override
|
||||
public String concatStrings(String left, String right) {
|
||||
return left + right;
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
## Collections
|
||||
|
||||
```java
|
||||
|
|
|
|||
282
print_page.html
282
print_page.html
|
|
@ -588,10 +588,10 @@ Hello, World!
|
|||
<ol>
|
||||
<li><a href="#02_basics-nutzung-der-konsole">Nutzung der Konsole</a></li>
|
||||
<li><a href="#02_basics-primitive-datentypen">Primitive Datentypen</a></li>
|
||||
<li><a href="#02_basics-">Nicht Primitive Datentypen</a></li>
|
||||
<li><a href="#02_basics-">Operatoren</a></li>
|
||||
<li><a href="#02_basics-">Bedingungen</a></li>
|
||||
<li><a href="#02_basics-">Schleifen</a></li>
|
||||
<li><a href="#02_basics-nicht-primitive-datentypen">Nicht Primitive Datentypen</a></li>
|
||||
<li><a href="#02_basics-operatoren">Operatoren</a></li>
|
||||
<li><a href="#02_basics-bedingungen">Bedingungen</a></li>
|
||||
<li><a href="#02_basics-schleifen">Schleifen</a></li>
|
||||
<li><a href="#02_basics-exceptions">Exceptions</a></li>
|
||||
</ol>
|
||||
<h2 id="02_basics-nutzung-der-konsole">Nutzung der Konsole</h2>
|
||||
|
|
@ -706,17 +706,53 @@ vergleichbar mit einem char-Array.</p>
|
|||
<span class="n">String</span><span class="w"> </span><span class="n">concatString</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">"hello"</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="s">"World"</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="s">"concatString: "</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">concatString</span><span class="p">);</span><span class="w"></span>
|
||||
</code></pre></div>
|
||||
<p>Methoden der Standardbibliothek:
|
||||
<div class="highlight"><pre><span></span><code><span class="n">myString</span><span class="p">.</span><span class="na">charAt</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns the char value at the specified index.</span><span class="w"></span>
|
||||
<span class="n">myString</span><span class="p">.</span><span class="na">indexOf</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns the index within this string of the first occurrence of the specified substring.</span><span class="w"></span>
|
||||
<span class="n">myString</span><span class="p">.</span><span class="na">substring</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns a string that is a substring of this string.</span><span class="w"></span>
|
||||
<span class="n">myString</span><span class="p">.</span><span class="na">equals</span><span class="p">();</span><span class="w"> </span><span class="c1">// Compares this string to the specified object.</span><span class="w"></span>
|
||||
<span class="n">myString</span><span class="p">.</span><span class="na">toLowerCase</span><span class="p">();</span><span class="w"> </span><span class="c1">// Converts all of the characters in this String to lower case.</span><span class="w"></span>
|
||||
<span class="n">myString</span><span class="p">.</span><span class="na">toUpperCase</span><span class="p">();</span><span class="w"> </span><span class="c1">// Converts all of the characters in this String to upper case.</span><span class="w"></span>
|
||||
<span class="n">myString</span><span class="p">.</span><span class="na">contains</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns true if and only if this string contains the specified sequence of char values.</span><span class="w"></span>
|
||||
<span class="n">myString</span><span class="p">.</span><span class="na">replaceAll</span><span class="p">();</span><span class="w"> </span><span class="c1">// Replaces each substring of this string that matches the given regular expression with the given replacement.</span><span class="w"></span>
|
||||
<span class="n">myString</span><span class="p">.</span><span class="na">compareTo</span><span class="p">();</span><span class="w"> </span><span class="c1">// Compares two strings lexicographically. The comparison is based on the Unicode value of each character in the strings.</span><span class="w"></span>
|
||||
</code></pre></div></p>
|
||||
<p>Methoden der Standardbibliothek:</p>
|
||||
<table>
|
||||
<thead>
|
||||
<tr>
|
||||
<th>Methode</th>
|
||||
<th>Beschreibung</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody>
|
||||
<tr>
|
||||
<td>myString.charAt()</td>
|
||||
<td>Returns the char value at the specified index.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>myString.indexOf()</td>
|
||||
<td>Returns the index within this string of the first occurrence of the specified substring.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>myString.substring()</td>
|
||||
<td>Returns a string that is a substring of this string.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>myString.equals()</td>
|
||||
<td>Compares this string to the specified object.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>myString.toLowerCase()</td>
|
||||
<td>Converts all of the characters in this String to lower case.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>myString.toUpperCase()</td>
|
||||
<td>Converts all of the characters in this String to upper case.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>myString.contains()</td>
|
||||
<td>Returns true if and only if this string contains the specified sequence of char values.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>myString.replaceAll()</td>
|
||||
<td>Replaces each substring of this string that matches the given regular expression with the given replacement.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>myString.compareTo()</td>
|
||||
<td>Compares two strings lexicographically. The comparison is based on the Unicode value of each character in the strings.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<h3 id="02_basics-numeric-datatypes">Numeric Datatypes</h3>
|
||||
<p>Im Gegensatz zu den primitiven Datentypen werden hier "Wrapper" verwendet, um
|
||||
dynamisch mit den Werten arbeiten zu können. Das erlaubt auch die Erweiterung
|
||||
|
|
@ -734,14 +770,41 @@ um verschiedene Methoden in der Standardbibliothek.</p>
|
|||
<span class="n">Float</span><span class="w"> </span><span class="n">myFloat</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">float</span><span class="p">)</span><span class="mf">10.0</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="n">myFloat</span><span class="p">.</span><span class="na">isNaN</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns true if this Float value is a Not-a-Number (NaN), false otherwise</span><span class="w"></span>
|
||||
</code></pre></div></p>
|
||||
<p>Funktionen für alle Numerischen Datentypen (Nicht Primitiv):
|
||||
<div class="highlight"><pre><span></span><code><span class="n">myNumber</span><span class="p">.</span><span class="na">compareTo</span><span class="p">();</span><span class="w"> </span><span class="c1">// Compares two Integer objects numerically.</span><span class="w"></span>
|
||||
<span class="n">myNumber</span><span class="p">.</span><span class="na">toString</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns a String object representing this Integer's value.</span><span class="w"></span>
|
||||
<span class="n">myNumber</span><span class="p">.</span><span class="na">intValue</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns the value of this Integer as an int.</span><span class="w"></span>
|
||||
<span class="n">myNumber</span><span class="p">.</span><span class="na">floatValue</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns the value of this Integer as a float after a widening primitive conversion.</span><span class="w"></span>
|
||||
<span class="n">myNumber</span><span class="p">.</span><span class="na">doubleValue</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns the value of this Integer as a double after a widening primitive conversion.</span><span class="w"></span>
|
||||
<span class="n">myNumber</span><span class="p">.</span><span class="na">shortValue</span><span class="p">();</span><span class="w"> </span><span class="c1">// Returns the value of this Integer as a short after a narrowing primitive conversion.</span><span class="w"></span>
|
||||
</code></pre></div></p>
|
||||
<p>Funktionen für alle Numerischen Datentypen (Nicht Primitiv):</p>
|
||||
<table>
|
||||
<thead>
|
||||
<tr>
|
||||
<th>Methode</th>
|
||||
<th>Beschreibung</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody>
|
||||
<tr>
|
||||
<td>myNumber.compareTo()</td>
|
||||
<td>Compares two Integer objects numerically.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>myNumber.toString()</td>
|
||||
<td>Returns a String object representing this Integer's value.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>myNumber.intValue()</td>
|
||||
<td>Returns the value of this Integer as an int.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>myNumber.floatValue()</td>
|
||||
<td>Returns the value of this Integer as a float after a widening primitive conversion.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>myNumber.doubleValue()</td>
|
||||
<td>Returns the value of this Integer as a double after a widening primitive conversion.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>myNumber.shortValue()</td>
|
||||
<td>Returns the value of this Integer as a short after a narrowing primitive conversion.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<h3 id="02_basics-arrays">Arrays</h3>
|
||||
<p>Bei Arrays handelt es sich um Schleifen eines bestimmten Datentypen. Sie werden
|
||||
verwendet, um mehrere Werte in einer Variable zu speichern.</p>
|
||||
|
|
@ -777,14 +840,41 @@ verwendet, um mehrere Werte in einer Variable zu speichern.</p>
|
|||
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="s">"]"</span><span class="p">);</span><span class="w"></span>
|
||||
<span class="p">}</span><span class="w"></span>
|
||||
</code></pre></div></p>
|
||||
<p>Methoden:
|
||||
<div class="highlight"><pre><span></span><code><span class="n">Arrays</span><span class="p">.</span><span class="na">toString</span><span class="p">(</span><span class="n">myArray</span><span class="p">);</span><span class="w"> </span><span class="c1">// a string representation of the object.</span><span class="w"></span>
|
||||
<span class="n">Arrays</span><span class="p">.</span><span class="na">copyOf</span><span class="p">(</span><span class="n">myArray</span><span class="p">,</span><span class="w"> </span><span class="mi">3</span><span class="p">);</span><span class="w"> </span><span class="c1">// Copies the specified array, truncating or padding with zeros (if necessary) so the copy has the specified length.</span><span class="w"></span>
|
||||
<span class="n">Arrays</span><span class="p">.</span><span class="na">compare</span><span class="p">(</span><span class="n">myArray</span><span class="p">,</span><span class="w"> </span><span class="n">myArray</span><span class="p">);</span><span class="w"> </span><span class="c1">// Compares two int arrays lexicographically.</span><span class="w"></span>
|
||||
<span class="n">Arrays</span><span class="p">.</span><span class="na">equals</span><span class="p">(</span><span class="n">myArray</span><span class="p">,</span><span class="w"> </span><span class="n">myArray</span><span class="p">);</span><span class="w"> </span><span class="c1">// Returns true if the two specified arrays of ints are equal to one another.</span><span class="w"></span>
|
||||
<span class="n">Arrays</span><span class="p">.</span><span class="na">sort</span><span class="p">(</span><span class="n">myArray</span><span class="p">);</span><span class="w"> </span><span class="c1">// Sorts the specified array into ascending numerical order</span><span class="w"></span>
|
||||
<span class="n">Arrays</span><span class="p">.</span><span class="na">fill</span><span class="p">(</span><span class="n">myArray</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">);</span><span class="w"> </span><span class="c1">// Assigns the specified int value to each element of the specified array of ints.</span><span class="w"></span>
|
||||
</code></pre></div></p>
|
||||
<p>Methoden:</p>
|
||||
<table>
|
||||
<thead>
|
||||
<tr>
|
||||
<th>Methode</th>
|
||||
<th>Beschreibung</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody>
|
||||
<tr>
|
||||
<td>Arrays.toString(Array a)</td>
|
||||
<td>a string representation of the object.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>Arrays.copyOf(Array a, int index)</td>
|
||||
<td>Copies the specified array, truncating or padding with zeros (if necessary) so the copy has the specified length.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>Arrays.compare(Array a, Array b)</td>
|
||||
<td>Compares two int arrays lexicographically.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>Arrays.equals(Array a, Array b)</td>
|
||||
<td>Returns true if the two specified arrays of ints are equal to one another.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>Arrays.sort(Array a)</td>
|
||||
<td>Sorts the specified array into ascending numerical order</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>Arrays.fill(Array a, int number)</td>
|
||||
<td>Assigns the specified int value to each element of the specified array of ints.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<h2 id="02_basics-operatoren">Operatoren</h2>
|
||||
<h3 id="02_basics-arithmetic-operators">Arithmetic Operators</h3>
|
||||
<div class="highlight"><pre><span></span><code><span class="kt">int</span><span class="w"> </span><span class="n">calcAddition</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">20</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="mi">10</span><span class="p">;</span><span class="w"> </span><span class="c1">// = 30</span><span class="w"></span>
|
||||
|
|
@ -1069,6 +1159,54 @@ The term simply means the creation of a new object, i.e. an instance, from a cla
|
|||
<div class="highlight"><pre><span></span><code><span class="n">String</span><span class="w"> </span><span class="n">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">String</span><span class="p">(</span><span class="s">"Thomas"</span><span class="p">);</span><span class="w"></span>
|
||||
</code></pre></div></p>
|
||||
</blockquote>
|
||||
<h2 id="04_introduction_to_objects-modifier">Modifier</h2>
|
||||
<p>Quelle: <a href="https://www.w3schools.com/java/java_modifiers.asp">w3schools.com</a></p>
|
||||
<h3 id="04_introduction_to_objects-access-modifier">Access-Modifier</h3>
|
||||
<table>
|
||||
<thead>
|
||||
<tr>
|
||||
<th>Modifier</th>
|
||||
<th>Beschreibung</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody>
|
||||
<tr>
|
||||
<td>public</td>
|
||||
<td>The code is accessible for all classes</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>private</td>
|
||||
<td>The code is only accessible within the declared class</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>protected</td>
|
||||
<td>The code is accessible in the same package and subclasses.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>default</td>
|
||||
<td>The code is only accessible in the same package. This is used when you don't specify a modifier.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<h3 id="04_introduction_to_objects-non-access-modifier">Non-Access-Modifier</h3>
|
||||
<table>
|
||||
<thead>
|
||||
<tr>
|
||||
<th>Modifier</th>
|
||||
<th>Beschreibung</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody>
|
||||
<tr>
|
||||
<td>final</td>
|
||||
<td>The class cannot be inherited by other classes</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>abstract</td>
|
||||
<td>The class cannot be used to create objects (To access an abstract class, it must be inherited from another class.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<h2 id="04_introduction_to_objects-1-einfache-objekte-und-veerbung">#1 Einfache Objekte und Veerbung</h2>
|
||||
<p><strong>Lernziele:</strong>
|
||||
* eine Klasse erzeugen
|
||||
|
|
@ -1373,52 +1511,14 @@ The term simply means the creation of a new object, i.e. an instance, from a cla
|
|||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
<span class="p">}</span><span class="w"></span>
|
||||
</code></pre></div>
|
||||
<h3 id="05_types_of_objects-abstract-and-interface">Abstract and Interface</h3>
|
||||
<p><div class="highlight"><pre><span></span><code><span class="c1">// Regex.java</span><span class="w"></span>
|
||||
<span class="kd">public</span><span class="w"> </span><span class="kd">interface</span> <span class="nc">Regex</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="nf">concatStrings</span><span class="p">(</span><span class="n">String</span><span class="w"> </span><span class="n">left</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">right</span><span class="p">);</span><span class="w"></span>
|
||||
<span class="p">}</span><span class="w"></span>
|
||||
</code></pre></div>
|
||||
<div class="highlight"><pre><span></span><code><span class="c1">// Main.java</span><span class="w"></span>
|
||||
<span class="kd">abstract</span><span class="w"> </span><span class="kd">class</span> <span class="nc">Language</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">showLanguage</span><span class="p">()</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="s">"This text is presented to you by Java"</span><span class="p">);</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">abstract</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">sayHelloWorld</span><span class="p">();</span><span class="w"></span>
|
||||
<span class="p">}</span><span class="w"></span>
|
||||
|
||||
<span class="c1">// Main.java</span><span class="w"></span>
|
||||
<span class="kd">public</span><span class="w"> </span><span class="kd">class</span> <span class="nc">Main</span><span class="w"> </span><span class="kd">extends</span><span class="w"> </span><span class="n">Language</span><span class="w"> </span><span class="kd">implements</span><span class="w"> </span><span class="n">Regex</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">main</span><span class="p">(</span><span class="n">String</span><span class="o">[]</span><span class="w"> </span><span class="n">args</span><span class="p">)</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="c1">// Language myLanguage = new Language();</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="c1">// 'Language' is abstract; cannot be instantiated</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="n">Main</span><span class="w"> </span><span class="n">myObject</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">Main</span><span class="p">();</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">myObject</span><span class="p">.</span><span class="na">sayHelloWorld</span><span class="p">();</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">wortwitz</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">myObject</span><span class="p">.</span><span class="na">concatStrings</span><span class="p">(</span><span class="s">"du"</span><span class="p">,</span><span class="w"> </span><span class="s">"schlampe"</span><span class="p">);</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="n">wortwitz</span><span class="p">);</span><span class="w"> </span><span class="c1">// duschlampe</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="nd">@Override</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">sayHelloWorld</span><span class="p">()</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="s">"I refuse to say that!"</span><span class="p">);</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="nd">@Override</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="nf">concatStrings</span><span class="p">(</span><span class="n">String</span><span class="w"> </span><span class="n">left</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">right</span><span class="p">)</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">left</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">right</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
<span class="p">}</span><span class="w"></span>
|
||||
</code></pre></div>
|
||||
<div class="highlight"><pre><span></span><code><span class="c1">// SaveState.java</span><span class="w"></span>
|
||||
|
||||
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.InvalidParameterException</span><span class="p">;</span><span class="w"></span>
|
||||
|
||||
<span class="kd">public</span><span class="w"> </span><span class="kd">class</span> <span class="nc">SaveState</span><span class="o"><</span><span class="n">T</span><span class="o">></span><span class="w"> </span><span class="kd">implements</span><span class="w"> </span><span class="n">Comparable</span><span class="o"><</span><span class="n">SaveState</span><span class="o">></span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="n">T</span><span class="w"> </span><span class="n">saveEntry</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">saveID</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">staticSaveID</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="kd">private</span><span class="w"> </span><span class="n">T</span><span class="w"> </span><span class="n">saveEntry</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="kd">private</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">saveID</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="kd">private</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">staticSaveID</span><span class="p">;</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="c1">// constructor</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">SaveState</span><span class="p">(</span><span class="n">T</span><span class="w"> </span><span class="n">saveEntry</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">InvalidParameterException</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
|
|
@ -1462,6 +1562,44 @@ The term simply means the creation of a new object, i.e. an instance, from a cla
|
|||
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
<span class="p">}</span><span class="w"></span>
|
||||
</code></pre></div>
|
||||
<h3 id="05_types_of_objects-abstract-and-interface">Abstract and Interface</h3>
|
||||
<p><div class="highlight"><pre><span></span><code><span class="c1">// Regex.java</span><span class="w"></span>
|
||||
<span class="kd">public</span><span class="w"> </span><span class="kd">interface</span> <span class="nc">Regex</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="nf">concatStrings</span><span class="p">(</span><span class="n">String</span><span class="w"> </span><span class="n">left</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">right</span><span class="p">);</span><span class="w"></span>
|
||||
<span class="p">}</span><span class="w"></span>
|
||||
</code></pre></div>
|
||||
<div class="highlight"><pre><span></span><code><span class="c1">// Main.java</span><span class="w"></span>
|
||||
<span class="kd">abstract</span><span class="w"> </span><span class="kd">class</span> <span class="nc">Language</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">showLanguage</span><span class="p">()</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="s">"This text is presented to you by Java"</span><span class="p">);</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">abstract</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">sayHelloWorld</span><span class="p">();</span><span class="w"></span>
|
||||
<span class="p">}</span><span class="w"></span>
|
||||
|
||||
<span class="c1">// Main.java</span><span class="w"></span>
|
||||
<span class="kd">public</span><span class="w"> </span><span class="kd">class</span> <span class="nc">Main</span><span class="w"> </span><span class="kd">extends</span><span class="w"> </span><span class="n">Language</span><span class="w"> </span><span class="kd">implements</span><span class="w"> </span><span class="n">Regex</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">main</span><span class="p">(</span><span class="n">String</span><span class="o">[]</span><span class="w"> </span><span class="n">args</span><span class="p">)</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="c1">// Language myLanguage = new Language();</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="c1">// 'Language' is abstract; cannot be instantiated</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="n">Main</span><span class="w"> </span><span class="n">myObject</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">Main</span><span class="p">();</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">myObject</span><span class="p">.</span><span class="na">sayHelloWorld</span><span class="p">();</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">wortwitz</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">myObject</span><span class="p">.</span><span class="na">concatStrings</span><span class="p">(</span><span class="s">"du"</span><span class="p">,</span><span class="w"> </span><span class="s">"schlampe"</span><span class="p">);</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="n">wortwitz</span><span class="p">);</span><span class="w"> </span><span class="c1">// duschlampe</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="nd">@Override</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">sayHelloWorld</span><span class="p">()</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="s">"I refuse to say that!"</span><span class="p">);</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
|
||||
<span class="w"> </span><span class="nd">@Override</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="nf">concatStrings</span><span class="p">(</span><span class="n">String</span><span class="w"> </span><span class="n">left</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">right</span><span class="p">)</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">left</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">right</span><span class="p">;</span><span class="w"></span>
|
||||
<span class="w"> </span><span class="p">}</span><span class="w"></span>
|
||||
<span class="p">}</span><span class="w"></span>
|
||||
</code></pre></div></p>
|
||||
<h2 id="05_types_of_objects-collections">Collections</h2>
|
||||
<div class="highlight"><pre><span></span><code><span class="kn">import</span><span class="w"> </span><span class="nn">java.util.*</span><span class="p">;</span><span class="w"></span>
|
||||
|
|
|
|||
File diff suppressed because one or more lines are too long
14
sitemap.xml
14
sitemap.xml
|
|
@ -2,37 +2,37 @@
|
|||
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
|
||||
<url>
|
||||
<loc>None</loc>
|
||||
<lastmod>2022-11-02</lastmod>
|
||||
<lastmod>2022-11-04</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
<url>
|
||||
<loc>None</loc>
|
||||
<lastmod>2022-11-02</lastmod>
|
||||
<lastmod>2022-11-04</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
<url>
|
||||
<loc>None</loc>
|
||||
<lastmod>2022-11-02</lastmod>
|
||||
<lastmod>2022-11-04</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
<url>
|
||||
<loc>None</loc>
|
||||
<lastmod>2022-11-02</lastmod>
|
||||
<lastmod>2022-11-04</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
<url>
|
||||
<loc>None</loc>
|
||||
<lastmod>2022-11-02</lastmod>
|
||||
<lastmod>2022-11-04</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
<url>
|
||||
<loc>None</loc>
|
||||
<lastmod>2022-11-02</lastmod>
|
||||
<lastmod>2022-11-04</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
<url>
|
||||
<loc>None</loc>
|
||||
<lastmod>2022-11-02</lastmod>
|
||||
<lastmod>2022-11-04</lastmod>
|
||||
<changefreq>daily</changefreq>
|
||||
</url>
|
||||
</urlset>
|
||||
BIN
sitemap.xml.gz
BIN
sitemap.xml.gz
Binary file not shown.
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Reference in New Issue