java.util.TreeMap.descendingKeySet() 方法示例

package com.codingdict;

import java.util.*;

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

      // creating tree map
      TreeMap<Integer, String> treemap = new TreeMap<Integer, String>();

      // populating tree map
      treemap.put(2, "two");
      treemap.put(1, "one");
      treemap.put(3, "three");
      treemap.put(6, "six");
      treemap.put(5, "five");

      // putting values in navigable set
      NavigableSet nset = treemap.descendingKeySet();

      System.out.println("Checking value");
      System.out.println("Navigable set values: "+nset);
   }    
}