In this part of the tutorial we will learn to use all the loops .We will create an example to display the content of the arraylist.

• With iterator all three loops can be used.
• While, dowhile, and for loop is easy to use with iterator.

Example Java Loop Iterator

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class loop {
	public static void main(String[] args) {
		List l = new ArrayList();
		for (int i = 1; i < 6; i++) {
			l.add(i);
		}
		Iterator it = l.iterator();
		System.out.println("while loop");
		while (it.hasNext()) {
			System.out.print(it.next() + "\t");
		}
		Iterator it1 = l.iterator();
		System.out.println("\ndo .. while");
		do {
			System.out.print(it1.next() + "\t");
		} while (it1.hasNext());
		Iterator it2 = l.iterator();
		System.out.println("\nfor loop");
		for (; it2.hasNext();) {
			System.out.print(it2.next() + "\t");
		}
	}
}

Output :

while loop 1 2 3 4 5 do .. while 1 2 3 4 5 for loop 1 2 3 4 5

Related Tags for Iterator Java Loop: