hashmap example

public class HashMapExample {
    public static void main(String[] args) {
        HashMap hm = new HashMap<Object,String>();
        hm.put(new Integer(2),"two");
        hm.put(new Integer(3),"threee");
        hm.put(new Integer(1),"one");
        hm.put(new Integer(4),"four");
        Set s = hm.entrySet();
        Iterator it =s.iterator();
        while(it.hasNext()) {
            Map.Entry m = (Map.Entry)it.next();
            int key = (Integer)m.getKey();
            String value = (String)m.getValue();
            System.out.println("key: " + key);
            System.out.println("value:" + value);


        }
    }
}