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JAVA JCF ARRAYLIST

Last update: 10/3/2014 6:30:00 PM

Yazan:Fatih KABAKCI

Java literatüründe dinamik diziler olarak adlandırılan ArrayList, koleksiyon mimarisinde en temel sınıflardan birisi olarak kabul edilir. ArrayListler çalışma anında boyutu dinamik olarak artıp azabilen nesnelerdir. Kullanımı son derece kolay, yeni nesil Java uygulamaları için oldukça esnek yapılardır. Ayrıca eski nesil Java kodları ile de uyumlu çalışır. ArrayList ' in genel prototipi aşağıda gösterilmiştir.

public class ArrayList extends AbstractList implements List, RandomAccess, Cloneable, Serializable

Yukarıda görüldüğü gibi ArrayListler AbstractArrayList sınıfını devralır ve List, RandomAccess, Cloneable, Serializable arabirimlerini uygular.

ArrayList kullanımını örnek olarak banka kuyrukları modelleyebiliriz. Basitçe bankada bulunan bir numeratör bankaya gelen müşterilere bir sıra numarası vererek kuyruğa almaktadır. Daha sonra işi biten müşterileri kuyruktan çıkarmaktadır.




Output:



ArrayListler List arabirimini uyguladığı için elemanlarına index yapısı ile erişilebilmektedir. Ayrıca bir ArrayList ' i kullanacağınız zaman, veri depolamanız için gerekli büyüklük ile uğraşmak zorunda kalmazsınız.
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