java.util.TreeMap.ceilingKey(K key) 方法示例

package com.codingdict;

import java.util.*;

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

      // creating tree map
      NavigableMap<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");

      System.out.println("Ceiling key entry for 4: "+ treemap.ceilingKey(4));
      System.out.println("Ceiling key entry for 5: "+ treemap.ceilingKey(5));
      System.out.println("Ceiling key entry for 7: "+ treemap.ceilingKey(7));
   }    
}