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Java Collections Framework: ArrayList

Java ArrayList is one of the most widely used Collection class. java.util.ArrayList class implements java.util.List interface. Java ArrayList also implements RandomAccess, Cloneable and Serializable interfaces. Java ArrayList class extends AbstractList class that the skeleton implementation of list

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Java Collections Framework: Iterable Interface

The Iterable interface (java.lang.Iterable) is the root interface of the Java collection classes. The Collection interface extends Iterable interface, so all subtypes of Collection implement the Iterable interface. This interface is to represent structures whose value can be traversed one by one.