Iterator Java Example

By Arvind Rai, August 16, 2013

java.util.Iterator iterates the elements in Collection Framework. Iterator has taken the place of Enumeration. Iterator has three elements

1. hasNext()- checks if elements are available.
2. next() - returns the value
3. remove()- removes the elements from the Collection.

Find the example below.

IteratorDemo.java

package com.util;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class IteratorDemo {
    public static void main(String[] args) {
        List list = new ArrayList();
        list.add("A");
        list.add("B");
        list.add("C");
        System.out.println(list.size());
        Iterator itr = list.iterator();
        while(itr.hasNext()){
            String s = itr.next();
            System.out.println(s);
            if("C".equals(s)){
                itr.remove();
            }
        }
        System.out.println(list.size());
    }
}

Output