java.util.TreeMap.pollLastEntry() 方法示例 java.util.TreeMap.pollFirstEntry() 方法示例 java.util.TreeMap.put(K key,V value) 方法示例 java.util.TreeMap.pollLastEntry() 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"); // polling last entry System.out.println("Value before poll: "+ treemap); System.out.println("Value returned: "+ treemap.pollLastEntry()); System.out.println("Value after poll: "+ treemap); } } java.util.TreeMap.pollFirstEntry() 方法示例 java.util.TreeMap.put(K key,V value) 方法示例