从树映射中删除所有值

 

import java.util.TreeMap;

 

public class Main {/**时 代 J a v a 公 众 号**/

 

  public static void main(String[] args) {

    TreeMap treeMap = new TreeMap();

   

    //add key value pairs to TreeMap

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

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

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

 

    treeMap.clear();

   

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

  }

}/** N o w  J a v a  .   c o m 提 供 **/