IteratorDemo.java

import java.util.*;
class IteratorDemo{
	public static void main(String args[]){
		ArrayList<String> al = new ArrayList<String>();
		al.add("I");
		al.add("am");
		al.add("not");
		al.add("so");
		al.add("high");
		System.out.print("Original contents of al: ");
		Iterator<String> itr = al.iterator();
		while(itr.hasNext()){
			String element = itr.next();
			System.out.print(element+" ");
		}
		System.out.println();
		ListIterator<String> litr = al.listIterator();
		while(litr.hasNext()){
			String element = litr.next();
			litr.set(element+"~");
		}
		System.out.print("Modified contents of al: ");
		itr = al.iterator();
		while(itr.hasNext()){
			String element = itr.next();
			System.out.print(element+"");
		}
		System.out.println();
		System.out.print("Modified list backwards: ");
		while(litr.hasPrevious()){
			String element = litr.previous();
			System.out.print(element+ " ");
		}
		System.out.println();
	}
}