从HashMap对象中删除所有值。

 

import java.util.HashMap;

 /** 时代Java 提 供 **/

public class Main {

 

  public static void main(String[] args) {

    HashMap hMap = new HashMap();

   

    hMap.put("1","One");

    hMap.put("2","Two");

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

 

    hMap.clear();

   

    System.out.println("Total key value pairs in HashMap are : " + hMap.size());

  }

}