Example of Hash Map

Here we write a program which is a simple Hash Map example.

package com.javaforecast4u;

import java.util.*;

public class TestHashMap {

     /**

      * @author:arbind;

      */

     public static void main(String[] args) {

         

          HashMap hm=new HashMap();

          hm.put("empid","1000");

          hm.put("empname","arbind");

          hm.put("email","arbind@gmail.com");

          hm.put("phone",new Integer(1000000));

          System.out.println(hm);

          System.out.println(hm.containsKey("sname"));

          System.out.println(hm.containsKey("xyz"));

          System.out.println(hm.containsValue("9999999"));

          System.out.println(hm.containsValue("muktesh"));

          System.out.println(hm.size());

          System.out.println(hm.isEmpty());

          Collection c=hm.values();

          Iterator i=c.iterator();

          while(i.hasNext())

          {

          System.out.println(i.next());

          }

          System.out.println("........................");

          System.out.println(hm.get("phone"));

          Set s=hm.keySet();

          Iterator i1=s.iterator();

          while(i1.hasNext())

          {

          String key=i1.next().toString();

          String val=hm.get(key).toString();

          System.out.println(""+key+"\t---\t"+val);

          System.out.println(i1.next());

          }

     }

}