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class="vector-toc-link" href="#Collections"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.3</span> <span>Collections</span> </div> </a> <ul id="toc-Collections-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Design_Patterns" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Design_Patterns"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.4</span> <span>Design Patterns</span> </div> </a> <ul id="toc-Design_Patterns-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Appendices" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Appendices"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.5</span> <span>Appendices</span> </div> </a> <ul id="toc-Appendices-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header 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id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Programmeren in Java</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Ga naar een artikel in een andere taal. 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href="https://az.wikibooks.org/wiki/Java" title="Java – Azerbeidzjaans" lang="az" hreflang="az" data-title="Java" data-language-autonym="Azərbaycanca" data-language-local-name="Azerbeidzjaans" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikibooks.org/wiki/%E0%A6%9C%E0%A6%BE%E0%A6%AD%E0%A6%BE_%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A7%8B%E0%A6%97%E0%A7%8D%E0%A6%B0%E0%A6%BE%E0%A6%AE%E0%A6%BF%E0%A6%82" title="জাভা প্রোগ্রামিং – Bengaals" lang="bn" hreflang="bn" data-title="জাভা প্রোগ্রামিং" data-language-autonym="বাংলা" data-language-local-name="Bengaals" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikibooks.org/wiki/Java" title="Java – Tsjechisch" lang="cs" hreflang="cs" data-title="Java" data-language-autonym="Čeština" data-language-local-name="Tsjechisch" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikibooks.org/wiki/Java" title="Java – Deens" lang="da" hreflang="da" data-title="Java" data-language-autonym="Dansk" data-language-local-name="Deens" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikibooks.org/wiki/Java_Standard" title="Java Standard – Duits" lang="de" hreflang="de" data-title="Java Standard" data-language-autonym="Deutsch" data-language-local-name="Duits" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikibooks.org/wiki/Java_Programming" title="Java Programming – Engels" lang="en" hreflang="en" data-title="Java Programming" data-language-autonym="English" data-language-local-name="Engels" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikibooks.org/wiki/Programaci%C3%B3n_en_Java" title="Programación en Java – Spaans" lang="es" hreflang="es" data-title="Programación en Java" data-language-autonym="Español" data-language-local-name="Spaans" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikibooks.org/wiki/Java" title="Java – Fins" lang="fi" hreflang="fi" data-title="Java" data-language-autonym="Suomi" data-language-local-name="Fins" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr badge-Q17437796 badge-featuredarticle mw-list-item" title="uitgelicht artikel"><a href="https://fr.wikibooks.org/wiki/Programmation_Java" title="Programmation Java – Frans" lang="fr" hreflang="fr" data-title="Programmation Java" data-language-autonym="Français" data-language-local-name="Frans" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikibooks.org/wiki/Java" title="Java – Hebreeuws" lang="he" hreflang="he" data-title="Java" data-language-autonym="עברית" data-language-local-name="Hebreeuws" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikibooks.org/wiki/Java_programoz%C3%A1s" title="Java programozás – Hongaars" lang="hu" hreflang="hu" data-title="Java programozás" data-language-autonym="Magyar" data-language-local-name="Hongaars" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikibooks.org/wiki/Java" title="Java – IJslands" lang="is" hreflang="is" data-title="Java" data-language-autonym="Íslenska" data-language-local-name="IJslands" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikibooks.org/wiki/Java" title="Java – Italiaans" lang="it" hreflang="it" data-title="Java" data-language-autonym="Italiano" data-language-local-name="Italiaans" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikibooks.org/wiki/Java" title="Java – Japans" lang="ja" hreflang="ja" data-title="Java" data-language-autonym="日本語" data-language-local-name="Japans" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikibooks.org/wiki/Java" title="Java – Georgisch" lang="ka" hreflang="ka" data-title="Java" data-language-autonym="ქართული" data-language-local-name="Georgisch" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikibooks.org/wiki/%E0%B4%9C%E0%B4%BE%E0%B4%B5_%E0%B4%AA%E0%B5%8D%E0%B4%B0%E0%B5%8B%E0%B4%97%E0%B5%8D%E0%B4%B0%E0%B4%BE%E0%B4%AE%E0%B4%BF%E0%B4%99%E0%B5%8D%E0%B4%99%E0%B5%8D" title="ജാവ പ്രോഗ്രാമിങ്ങ് – Malayalam" lang="ml" hreflang="ml" data-title="ജാവ പ്രോഗ്രാമിങ്ങ്" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikibooks.org/wiki/Java" title="Java – Noors" lang="no" hreflang="no" data-title="Java" data-language-autonym="Norsk" data-language-local-name="Noors" class="interlanguage-link-target"><span>Norsk</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikibooks.org/wiki/Java" title="Java – Pools" lang="pl" hreflang="pl" data-title="Java" data-language-autonym="Polski" data-language-local-name="Pools" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikibooks.org/wiki/Java" title="Java – Portugees" lang="pt" hreflang="pt" data-title="Java" data-language-autonym="Português" data-language-local-name="Portugees" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikibooks.org/wiki/Java" title="Java – Russisch" lang="ru" hreflang="ru" data-title="Java" data-language-autonym="Русский" data-language-local-name="Russisch" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikibooks.org/wiki/Java" title="Java – Albanees" lang="sq" hreflang="sq" data-title="Java" data-language-autonym="Shqip" data-language-local-name="Albanees" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikibooks.org/wiki/%E0%AE%9C%E0%AE%BE%E0%AE%B5%E0%AE%BE" title="ஜாவா – Tamil" lang="ta" hreflang="ta" data-title="ஜாவா" data-language-autonym="தமிழ்" data-language-local-name="Tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikibooks.org/wiki/%E0%B8%A0%E0%B8%B2%E0%B8%A9%E0%B8%B2%E0%B8%88%E0%B8%B2%E0%B8%A7%E0%B8%B2" title="ภาษาจาวา – Thai" lang="th" hreflang="th" data-title="ภาษาจาวา" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikibooks.org/wiki/Java" title="Java – Turks" lang="tr" hreflang="tr" data-title="Java" data-language-autonym="Türkçe" data-language-local-name="Turks" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a 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aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Uit Wikibooks</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="nl" dir="ltr"><table class="noprint bookInfobox"><tbody><tr> <td> <div style="position: relative; height: 30px; width: 30px; overflow: hidden;"><div style="position: absolute; top: 0; left: 0; font-size: 100px; height: 30px; width: 30px; overflow: hidden; line-height: 100px; z-index: 3;"><a href="/wiki/Wikibooks:Infobox/Programmeren_in_Java" title="Wikibooks:Infobox/Programmeren in Java">___</a></div> <div style="position: absolute; top: 0; left: 0; z-index: 2;"><span typeof="mw:File"><a href="/wiki/Bestand:Messagebox_info.png" class="mw-file-description" title="Wikibooks:Infobox/Programmeren in Java"><img alt="Wikibooks:Infobox/Programmeren in Java" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7a/Messagebox_info.png/30px-Messagebox_info.png" decoding="async" width="30" height="30" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7a/Messagebox_info.png/45px-Messagebox_info.png 1.5x, //upload.wikimedia.org/wikipedia/commons/7/7a/Messagebox_info.png 2x" data-file-width="48" data-file-height="48" /></a></span></div></div> </td><td> <div style="position: relative; height: 30px; width: 30px; overflow: hidden;"><div style="position: absolute; top: 0; left: 0; font-size: 100px; height: 30px; width: 30px; overflow: hidden; line-height: 100px; z-index: 3;"><a href="/wiki/Programmeren_in_Java/Printversie" title="Programmeren in Java/Printversie">___</a></div> <div style="position: absolute; top: 0; left: 0; z-index: 2;"><span typeof="mw:File"><a href="/wiki/Bestand:Exquisite-print_printer.png" class="mw-file-description" title="Programmeren in Java/Printversie"><img alt="Programmeren in Java/Printversie" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/89/Exquisite-print_printer.png/30px-Exquisite-print_printer.png" decoding="async" width="30" height="30" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/89/Exquisite-print_printer.png/45px-Exquisite-print_printer.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/89/Exquisite-print_printer.png/60px-Exquisite-print_printer.png 2x" data-file-width="128" data-file-height="128" /></a></span></div></div> </td> </tr></tbody></table> <p><b>Wat is Java?</b> Java is een objectgeoriënteerde (OO) taal. Dit wil zeggen dat je alles beschrijft zoals in het dagelijkse leven. Je hebt objecten, en deze objecten bezitten eigenschappen (<i>variabelen</i>) en kunnen handelingen verrichten (<i>methoden</i>). Meestal schermt men in Java de variabelen en de implementatie van elk object af van de buitenwereld (<i>data hiding</i> en <i>encapsulatie</i>). </p><p>Java is tegenwoordig een van de populairste programmeertalen voor zowel opleiding als praktische uitvoering. Dankzij de uitgebreide API en de platformonafhankelijkheid is Java zeer toegankelijk als basis om de concepten van objectgeoriënteerd programmeren verder uit te diepen. </p><p>Java is een gecompileerde, maar platformonafhankelijke taal. Programmacode wordt naar een speciale binaire <i>bytecode</i> omgezet die door een <i>Java Virtual Machine</i> (JVM) wordt uitgevoerd. Elk programma hoeft maar één keer gecompileerd te worden om op verschillende met JVM uitgeruste systemen te draaien. Dit is meteen de sterkte en de zwakte van Java. De JVM leest de bytecode in en zet deze om naar platformafhankelijke acties, dit vraagt tijd, Java is dus niet de snelste taal. Maar programma's in Java werken wel op elk besturingssysteem zonder dat je de code moet aanpassen of gewoon volledig moet hercoderen (in tegenstelling tot talen als <a href="https://nl.wikipedia.org/wiki/C%2B%2B" class="extiw" title="w:C++">C++</a> of <a href="https://nl.wikipedia.org/wiki/Objective-C" class="extiw" title="w:Objective-C">Objective-C</a>). </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Inhoud">Inhoud</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Programmeren_in_Java&action=edit&section=1" title="Bewerk dit kopje: Inhoud"><span>bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <ol><li><a href="/wiki/Programmeren_in_Java/Inleiding" title="Programmeren in Java/Inleiding">Inleiding</a></li> <li><a href="/wiki/Programmeren_in_Java/Installatie" title="Programmeren in Java/Installatie">Installatie</a></li> <li><a href="/w/index.php?title=Programmeren_in_Java/Hulpmiddelen&action=edit&redlink=1" class="new" title="Programmeren in Java/Hulpmiddelen (de pagina bestaat niet)">Hulpmiddelen</a></li></ol> <div class="mw-heading mw-heading3"><h3 id="Basis">Basis</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Programmeren_in_Java&action=edit&section=2" title="Bewerk dit kopje: Basis"><span>bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <ol><li><a href="/wiki/Programmeren_in_Java/Basis" title="Programmeren in Java/Basis">Basis</a> <span class="mw-default-size" typeof="mw:File"><a href="/wiki/Bestand:00_percent.svg" class="mw-file-description" title="Nog vrijwel niets. 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Revisiedatum: 19 januari 2021" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/60/00_percent.svg/9px-00_percent.svg.png" decoding="async" width="9" height="9" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/60/00_percent.svg/14px-00_percent.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/60/00_percent.svg/18px-00_percent.svg.png 2x" data-file-width="9" data-file-height="9" /></a></span></li></ol> <div class="mw-heading mw-heading3"><h3 id="Collections">Collections</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Programmeren_in_Java&action=edit&section=4" title="Bewerk dit kopje: Collections"><span>bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <ol><li><a href="/wiki/Programmeren_in_Java/Collections" title="Programmeren in Java/Collections">Collections</a></li> <li><a href="/wiki/Programmeren_in_Java/List" title="Programmeren in Java/List">List</a></li> <li><a href="/w/index.php?title=Programmeren_in_Java/Set&action=edit&redlink=1" class="new" title="Programmeren in Java/Set (de pagina bestaat niet)">Set</a></li> <li><a href="/w/index.php?title=Programmeren_in_Java/Queue&action=edit&redlink=1" class="new" title="Programmeren in Java/Queue (de pagina bestaat niet)">Queue</a></li> <li><a href="/wiki/Programmeren_in_Java/Map" title="Programmeren in Java/Map">Map</a></li></ol> <div class="mw-heading mw-heading3"><h3 id="Design_Patterns">Design Patterns</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Programmeren_in_Java&action=edit&section=5" title="Bewerk dit kopje: Design Patterns"><span>bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <ol><li><a href="/wiki/Programmeren_in_Java/Design_Patterns/Strategy_Pattern" title="Programmeren in Java/Design Patterns/Strategy Pattern">Strategy Pattern</a></li> <li><a href="/w/index.php?title=Programmeren_in_Java/Design_Patterns/Factory_Pattern&action=edit&redlink=1" class="new" title="Programmeren in Java/Design Patterns/Factory Pattern (de pagina bestaat niet)">Factory Pattern</a></li> <li><a href="/w/index.php?title=Programmeren_in_Java/Design_Patterns/State_Pattern&action=edit&redlink=1" class="new" title="Programmeren in Java/Design Patterns/State Pattern (de pagina bestaat niet)">State Pattern</a></li></ol> <div class="mw-heading mw-heading3"><h3 id="Appendices">Appendices</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Programmeren_in_Java&action=edit&section=6" title="Bewerk dit kopje: Appendices"><span>bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <ol><li><a href="/wiki/Programmeren_in_Java/Appendix_B" title="Programmeren in Java/Appendix B">Appendix B: Javadoc</a> <ul><li>Javadoc</li> <li>Testcode</li></ul></li></ol> <div class="toccolours noprint" style="clear: both; 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