Web Reference: Mar 11, 2026 · An Iterator object is created by calling the iterator () method on a collection object. Here, we will use an Iterator to traverse and print each element in an ArrayList. Java Iterator An Iterator is an object that can be used to loop through collections, like ArrayList and HashSet. It is called an "iterator" because "iterating" is the technical term for looping. To use an Iterator, you must import it from the java.util package. An Iteratoris one of many ways we can traverse a collection, and as every option, it has its pros and cons. It was first introduced in Java 1.2 as a replacement of Enumerationsand: 1. introduced improved method names 2. made it possible to remove elements from a collection we’re iterating over 3. doesn’t guarantee iteration order In this tutorial, ...
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