Java – Iterator Example

import java.util.Hashtable;
import java.util.Iterator;
import java.util.Set;
import java.util.Map;

public class IteratorExample {

     public static void main(String[] args) {

            Hashtable<Integer,String> hTable=new Hashtable<Integer,String>();

            hTable.put(new Integer(2), "Two");
            hTable.put(new Integer(1), "One");
            hTable.put(new Integer(4), "Four");
            hTable.put(new Integer(3), "Three");

            Set s =hTable.entrySet();

            // Using iterator in hashtable 
            Iterator i=s.iterator();

            while(i.hasNext())
            {
                Map.Entry m=(Map.Entry)i.next();

                int key = (Integer)m.getKey();
                String value=(String)m.getValue();

                System.out.println("Key :"+key+"  value :"+value);
            }
        }
}

Key :4 value :Four
Key :3 value :Three
Key :2 value :Two
Key :1 value :One