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java.util package has public interface Iterator and contains three methods: boolean hasNext(): It returns true if Iterator has more element to iterate. Object next(): It returns the next element in the collection until the hasNext()method return true. void remove(): It removes the current element in the collection. 2 Jan 2019 A quick and practical guide to the Iterator class in Java. An Iterator is one of many ways we can traverse a collection, and as every option, In this tutorial, we're going to review the simple Iterator interface to learn how we Iterator is used for iterating (looping) various collection classes such as HashMap, ArrayList, LinkedList etc. In this tutorial, we will learn what is. 5 Jan 2012 This collections Java tutorial describes interfaces, implementations, and add , remove ), and methods that provide an iterator over the collection ( iterator ). Learn Java in simple and easy steps starting from basic to advanced concepts with examples including Java Syntax Object Oriented Language, Methods, By using this iterator object, you can access each element in the collection, one First discuss about how to get an Iterator object from a Collection. Each and every Collection class has theJava iterator example. Java Iterator is used to iterate over the elements in a collection (list, set or map). It helps to retrieve the elements one by one. 26 Mar 2018 As its name already suggest, it is used to iterate over the elements of collections. This interface was introduced in the version 1.2 of Java. 19 Feb 2013 It doesn't require an Iterator and is thus more compact and probably more The Collection in this example is a simple ArrayList of Strings.