java.util.TreeMap.headMap(K toKey,boolean inclusive) 方法示例

package com.codingdict;

import java.util.*;

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

      // creating maps
      TreeMap<Integer, String> treemap = new TreeMap<Integer, String>();
      NavigableMap<Integer, String> treemapheadincl = 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");

      // getting head map inclusive 3
      treemapheadincl = treemap.headMap(3,true);

      System.out.println("Checking values of the map");
      System.out.println("Value is: "+ treemapheadincl);
   }    
}