{"id":10202,"date":"2026-10-30T14:19:00","date_gmt":"2026-10-30T11:19:00","guid":{"rendered":"https:\/\/www.yunuskaytan.com\/?p=10202"},"modified":"2026-10-30T14:19:00","modified_gmt":"2026-10-30T11:19:00","slug":"java-da-arraylist-kullanimi","status":"publish","type":"post","link":"https:\/\/www.yunuskaytan.com\/en\/yk\/java-da-arraylist-kullanimi\/","title":{"rendered":"Java&#8217;da ArrayList Kullan\u0131m\u0131"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Yaz\u0131l\u0131m geli\u015ftirme s\u00fcre\u00e7lerinde verileri mant\u0131ksal bir s\u0131ra halinde tutmak ve bu verilere dinamik olarak m\u00fcdahale etmek en temel ihtiya\u00e7lardan biridir. Java programlama dilinde standart diziler (arrays) belirli bir boyuta sahip olacak \u015fekilde tan\u0131mlan\u0131r ve program\u0131n \u00e7al\u0131\u015fma an\u0131nda bu boyut de\u011fi\u015ftirilemez. Veri k\u00fcmesinin b\u00fcy\u00fckl\u00fc\u011f\u00fcn\u00fcn \u00f6nceden kestirilemedi\u011fi senaryolarda bu sabit yap\u0131 ciddi bir k\u0131s\u0131tlama yarat\u0131r. \u0130\u015fte bu noktada Java Collections Framework i\u00e7inde yer alan <code>ArrayList<\/code> s\u0131n\u0131f\u0131 devreye girer.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ArrayList Nedir ve Neden Kullan\u0131l\u0131r?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><code>ArrayList<\/code>, <code>java.util<\/code> paketinde bulunan ve <code>List<\/code> aray\u00fcz\u00fcn\u00fc (interface) uygulayan dinamik bir dizi s\u0131n\u0131f\u0131d\u0131r. Geleneksel diziler gibi elemanlar\u0131 indeks mant\u0131\u011f\u0131yla (0&#8217;dan ba\u015flayarak) s\u0131ral\u0131 olarak tutar; ancak en \u00f6nemli fark\u0131, eleman eklendik\u00e7e veya silindik\u00e7e boyutunun arka planda otomatik olarak geni\u015fleyip daralabilmesidir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Standart diziler ile <code>ArrayList<\/code> aras\u0131ndaki temel farklar \u015fu \u015fekildedir:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Standart diziler sabit boyutludur, <code>ArrayList<\/code> ise dinamik olarak b\u00fcy\u00fcr ve k\u00fc\u00e7\u00fcl\u00fcr.<\/li>\n\n<li>Standart diziler hem ilkel veri tiplerini (int, char vb.) hem de nesneleri tutabilir; <code>ArrayList<\/code> ise yaln\u0131zca nesne referanslar\u0131n\u0131 tutabilir.<\/li>\n\n<li><code>ArrayList<\/code>, eleman arama, s\u0131ralama, ekleme ve silme i\u015flemlerini kolayla\u015ft\u0131ran yerle\u015fik metotlara sahiptir.<\/li>\n\n<li>Standart diziler daha az bellek t\u00fcketir ve hafif h\u0131z avantaj\u0131 sunarken, <code>ArrayList<\/code> sundu\u011fu esneklik ile geli\u015ftirme s\u00fcrecini kolayla\u015ft\u0131r\u0131r.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">ArrayList Tan\u0131mlama ve Ba\u015flatma<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Bir <code>ArrayList<\/code> tan\u0131mlarken Generic (Jenerik) yap\u0131s\u0131 kullan\u0131l\u0131r. Bu yap\u0131, listenin hangi veri t\u00fcr\u00fcnde nesneler saklayaca\u011f\u0131n\u0131 belirlemenizi sa\u011flar. \u0130lkel veri tipleri do\u011frudan kullan\u0131lamad\u0131\u011f\u0131 i\u00e7in onlar\u0131n sarmalay\u0131c\u0131 s\u0131n\u0131flar\u0131 (Wrapper Classes) olan <code>Integer<\/code>, <code>Double<\/code>, <code>Boolean<\/code> gibi tipler tercih edilmelidir.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.ArrayList;\n\npublic class Main {\n    public static void main(String[] args) {\n        \/\/ String t\u00fcr\u00fcnde eleman tutan bir ArrayList tan\u0131m\u0131\n        ArrayList&lt;String&gt; sehirler = new ArrayList&lt;&gt;();\n\n        \/\/ Integer (say\u0131sal) t\u00fcrde eleman tutan bir ArrayList tan\u0131m\u0131\n        ArrayList&lt;Integer&gt; sayilar = new ArrayList&lt;&gt;();\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Yukar\u0131daki kod blo\u011funda <code>import java.util.ArrayList;<\/code> ifadesi ile ilgili s\u0131n\u0131f projeye dahil edilmi\u015ftir. Tan\u0131mlama sat\u0131r\u0131nda sa\u011f taraftaki elmas operat\u00f6r\u00fcn\u00fcn <code>&lt;&gt;<\/code> i\u00e7erisi bo\u015f b\u0131rak\u0131labilir; derleyici sol taraftaki t\u00fcr bilgisinden bunu otomatik olarak \u00e7\u0131kar\u0131r.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Temel ArrayList Metotlar\u0131<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><code>ArrayList<\/code> s\u0131n\u0131f\u0131, veri manip\u00fclasyonu i\u00e7in zengin bir metot k\u00fcmesi sunar. En s\u0131k ba\u015fvurulan metotlar ve i\u015flevleri a\u015fa\u011f\u0131da yer almaktad\u0131r.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Eleman Ekleme: add()<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Listeye yeni bir veri eklemek i\u00e7in <code>add()<\/code> metodu kullan\u0131l\u0131r. Bu metot \u00e7a\u011fr\u0131ld\u0131\u011f\u0131nda yeni eleman listenin sonuna eklenir. E\u011fer istenen belirli bir indekse ekleme yap\u0131lmak istenirse, metot a\u015f\u0131r\u0131 y\u00fcklenmi\u015f haliyle <code>add(indeks, eleman)<\/code> \u015feklinde \u00e7a\u011fr\u0131l\u0131r.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Elemana Eri\u015fme: get()<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Belirli bir indisteki veriyi okumak i\u00e7in <code>get()<\/code> metodu kullan\u0131l\u0131r. \u0130ndeks de\u011ferinin liste s\u0131n\u0131rlar\u0131 i\u00e7inde olmas\u0131 zorunludur; aksi halde <code>IndexOutOfBoundsException<\/code> hatas\u0131 al\u0131n\u0131r.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Eleman\u0131 G\u00fcncelleme: set()<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Mevcut bir indisteki de\u011feri yenisiyle de\u011fi\u015ftirmek i\u00e7in <code>set(indeks, yeniEleman)<\/code> metodu kullan\u0131l\u0131r. Bu i\u015flem dizinin boyutunu de\u011fi\u015ftirmez.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Eleman Silme: remove()<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Bir eleman\u0131 silmek i\u00e7in iki alternatif bulunur. <code>remove(int indeks)<\/code> belirtilen indisteki veriyi kald\u0131r\u0131r ve ard\u0131ndaki elemanlar\u0131 sola kayd\u0131r\u0131r. <code>remove(Object o)<\/code> ise parametre olarak verilen nesnenin listedeki ilk e\u015fle\u015fmesini siler.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Boyut ve Durum Kontrolleri: size(), contains(), isEmpty(), clear()<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>size()<\/code>: Listenin anl\u0131k eleman say\u0131s\u0131n\u0131 d\u00f6nd\u00fcr\u00fcr.<\/li>\n\n<li><code>contains(Object o)<\/code>: Belirtilen eleman\u0131n listede var olup olmad\u0131\u011f\u0131n\u0131 boolean olarak d\u00f6ner.<\/li>\n\n<li><code>isEmpty()<\/code>: Listenin bo\u015f olup olmad\u0131\u011f\u0131n\u0131 kontrol eder.<\/li>\n\n<li><code>clear()<\/code>: Listedeki t\u00fcm elemanlar\u0131 temizleyerek listeyi bo\u015f hale getirir.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Uygulamal\u0131 \u00f6rnek:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.ArrayList;\n\npublic class MetotOrnekleri {\n    public static void main(String[] args) {\n        ArrayList&lt;String&gt; diller = new ArrayList&lt;&gt;();\n\n        \/\/ Eleman ekleme\n        diller.add(\"Java\");\n        diller.add(\"Python\");\n        diller.add(\"C++\");\n        diller.add(1, \"Go\"); \/\/ 1. indekse Go eklenir, di\u011ferleri kayd\u0131r\u0131l\u0131r\n\n        \/\/ Elemana eri\u015fme\n        System.out.println(\"0. indisteki dil: \" + diller.get(0));\n\n        \/\/ Eleman g\u00fcncelleme\n        diller.set(2, \"Rust\"); \/\/ Python yerine Rust yaz\u0131ld\u0131\n\n        \/\/ Eleman silme\n        diller.remove(\"C++\"); \/\/ De\u011fere g\u00f6re silme\n        diller.remove(0);     \/\/ \u0130ndekse g\u00f6re silme (Java silindi)\n\n        \/\/ Boyut ve kontrol\n        System.out.println(\"Liste boyutu: \" + diller.size());\n        System.out.println(\"Go var m\u0131: \" + diller.contains(\"Go\"));\n\n        \/\/ Listeyi yazd\u0131rma\n        System.out.println(\"Kalan diller: \" + diller);\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Bu kod \u00e7al\u0131\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda \u00e7\u0131kt\u0131da s\u0131ras\u0131yla g\u00fcncellenmi\u015f de\u011ferler ve kalan liste elemanlar\u0131 yazd\u0131r\u0131l\u0131r. <code>System.out.println<\/code> do\u011frudan liste nesnesine verildi\u011finde <code>ArrayList<\/code>&#8216;in yerle\u015fik <code>toString()<\/code> metodu devreye girerek elemanlar\u0131 k\u00f6\u015feli parantez i\u00e7inde listeler.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ArrayList \u00dczerinde Gezinme Y\u00f6ntemleri<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Listeler \u00fczerindeki verileri tek tek i\u015flemek i\u00e7in \u00e7e\u015fitli d\u00f6ng\u00fc mekanizmalar\u0131 kullan\u0131l\u0131r. \u0130htiyaca g\u00f6re standart for d\u00f6ng\u00fcs\u00fc, geli\u015fmi\u015f for (for-each) d\u00f6ng\u00fcs\u00fc veya <code>Iterator<\/code> tercih edilebilir.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.ArrayList;\nimport java.util.Iterator;\n\npublic class DonguOrnekleri {\n    public static void main(String[] args) {\n        ArrayList&lt;String&gt; portlar = new ArrayList&lt;&gt;();\n        portlar.add(\"80 - HTTP\");\n        portlar.add(\"443 - HTTPS\");\n        portlar.add(\"22 - SSH\");\n\n        \/\/ 1. Geli\u015fmi\u015f For-Each D\u00f6ng\u00fcs\u00fc (En yayg\u0131n ve okunakl\u0131 yol)\n        for (String port : portlar) {\n            System.out.println(\"Port: \" + port);\n        }\n\n        \/\/ 2. Standart For D\u00f6ng\u00fcs\u00fc (\u0130ndeks bilgisi gerekti\u011finde)\n        for (int i = 0; i &lt; portlar.size(); i++) {\n            System.out.println(i + \". port: \" + portlar.get(i));\n        }\n\n        \/\/ 3. Iterator ile Gezinme (D\u00f6ng\u00fc an\u0131nda g\u00fcvenli silme i\u015flemi i\u00e7in)\n        Iterator&lt;String&gt; iterator = portlar.iterator();\n        while (iterator.hasNext()) {\n            String p = iterator.next();\n            if (p.contains(\"22\")) {\n                iterator.remove(); \/\/ ConcurrentModificationException almadan silme yapar\n            }\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00f6ng\u00fc esnas\u0131nda liste \u00fczerinden eleman silmek isteniyorsa, do\u011frudan <code>portlar.remove()<\/code> \u00e7a\u011f\u0131rmak <code>ConcurrentModificationException<\/code> hatas\u0131na yol a\u00e7ar. Bu gibi durumlarda <code>Iterator<\/code> nesnesinin <code>remove()<\/code> metodunu kullanmak g\u00fcvenli y\u00f6ntemdir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Performans ve Bellek Y\u00f6netimi<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><code>ArrayList<\/code>, dahili olarak standart bir dizi (<code>Object[] elementData<\/code>) bar\u0131nd\u0131r\u0131r. Varsay\u0131lan ba\u015flang\u0131\u00e7 kapasitesi genellikle 10&#8217;dur. Bu kapasite doldu\u011funda, Java arka planda mevcut dizinin yakla\u015f\u0131k y\u00fczde 50 daha b\u00fcy\u00fck bir kopyas\u0131n\u0131 olu\u015fturur ve t\u00fcm elemanlar\u0131 yeni diziye aktar\u0131r.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0130ndeks ile okuma (<code>get<\/code>) ve son indekse yazma (<code>add<\/code>) i\u015flemleri do\u011frudan bellek adreslemesi sayesinde O(1) zaman karma\u015f\u0131kl\u0131\u011f\u0131na sahiptir.<\/li>\n\n<li>Araya eleman ekleme veya aradan eleman silme durumunda sa\u011fdaki t\u00fcm elemanlar\u0131n kayd\u0131r\u0131lmas\u0131 gerekti\u011finden bu i\u015flemler O(n) zaman al\u0131r.<\/li>\n\n<li>B\u00fcy\u00fck hacimli veri eklemeleri yap\u0131laca\u011f\u0131 biliniyorsa, dizinin s\u00fcrekli yeniden boyutland\u0131r\u0131lmas\u0131n\u0131n getirece\u011fi bellek kopyalama maliyetini \u00f6nlemek i\u00e7in ba\u015flang\u0131\u00e7 kapasitesi belirtilmelidir: <code>new ArrayList&lt;&gt;(100000)<\/code>.<\/li>\n\n<li><code>ArrayList<\/code> i\u015f par\u00e7ac\u0131\u011f\u0131 (thread) g\u00fcvenli de\u011fildir. \u00c7ok i\u015f par\u00e7ac\u0131kl\u0131 (multithreaded) ortamlarda e\u015fzamanl\u0131 de\u011fi\u015fiklik gerekiyorsa <code>CopyOnWriteArrayList<\/code> veya <code>Collections.synchronizedList()<\/code> alternatifleri de\u011ferlendirilmelidir.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u00d6zet ve Sonraki Ad\u0131mlar<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><code>java.util.ArrayList<\/code>, esnek yap\u0131s\u0131 ve zengin metot deste\u011fi ile Java&#8217;da en \u00e7ok ba\u015fvurulan koleksiyon t\u00fcrlerinden biridir. \u0130ndeks bazl\u0131 eri\u015fimlerin yo\u011fun oldu\u011fu ve veri boyutunun de\u011fi\u015fkenlik g\u00f6sterdi\u011fi projelerde ideal bir \u00e7\u00f6z\u00fcmd\u00fcr. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bir sonraki ad\u0131mda, elemanlar\u0131n aras\u0131na s\u0131k\u00e7a ekleme\/\u00e7\u0131karma yap\u0131lan durumlar i\u00e7in daha optimize olan <code>LinkedList<\/code> yap\u0131s\u0131n\u0131 ve koleksiyonlar aras\u0131ndaki temel performans farklar\u0131n\u0131 inceleyebilirsiniz.<\/p>","protected":false},"excerpt":{"rendered":"<p>Java&#8217;da dinamik boyutlu dizi y\u00f6netimini sa\u011flayan ArrayList yap\u0131s\u0131n\u0131n temellerini, s\u0131k kullan\u0131lan metotlar\u0131n\u0131 ve pratik kod \u00f6rneklerini inceliyoruz.<\/p>","protected":false},"author":1,"featured_media":10203,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_themeisle_gutenberg_block_has_review":false,"footnotes":""},"categories":[227],"tags":[245,347,286,263,264],"class_list":["post-10202","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","tag-java","tag-java-arraylist","tag-nesne-yonelimli-programlama","tag-veri-yapilari","tag-yazilim"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Java&#039;da ArrayList Kullan\u0131m\u0131 - Yunus KAYTAN<\/title>\n<meta name=\"description\" content=\"Java ArrayList yap\u0131s\u0131n\u0131 s\u0131f\u0131rdan \u00f6\u011frenin. 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