java.util.Collections.synchronizedMap() 方法

package com.codingdict;

import java.util.*;

public class CollectionsDemo {
   public static void main(String[] args) {

      // create map
      Map<String,String> map = new HashMap<String,String>();

      // populate the map
      map.put("1","TP");
      map.put("2","IS");
      map.put("3","BEST");

      // create a synchronized map
      Map<String,String> synmap = Collections.synchronizedMap(map);

      System.out.println("Synchronized map is :"+synmap);
   }
}