How to get HashMap into SynchronisedHashMap

Here   is  an   easy example  that  converts  HashMap into SynchronisedHashMap. Its  simple java

 code but  some time useful while handling multi Threads.

     

import java.util.HashMap;

import java.util.Collections;

import java.util.Map;

import  java.util.Set;

import  java.util.Iterator ;

class synchroHashMap

{

  public static void main(String[] args)

{

        HashMap hashMap = new HashMap();

             hashMap.put("1","One");

             hashMap.put("2","Two");

             hashMap.put("3","Three");

Map map = Collections.synchronizedMap(hashMap);

             // map  can be use by mutipul Threads.

                Set  s=hashMap.keySet();

    Iterator  it=s.iterator();

        while(it.hasNext())

System.out.println("Key are " +it.next());

        

           }

          }

   Program  Output . 

 Converted  HashMap into SynchronisedHashMap   and  then  got  the Keyset  of  HashMap. 

Key are 1

Key are 2

Key are 3