Sample5.java

import java.util.HashSet;
import java.util.Iterator;

public class Sample5 {
 
 public static void main(String[] args)
 {
 HashSet hs=new HashSet(); //dont follow order no concept of index as well as hashset wont follow duplicate elements
 hs.add(100);
 hs.add("true");
 hs.add(true);
 hs.add(100);
 hs.add(1);
 Iterator itr=hs.iterator();
 while(itr.hasNext())
 {
 Object o= itr.next();
 System.out.println(o);
 }
 
 
 
 }
 
}