2016.07.26 qq:992591601,欢迎交流 首先介绍些基本概念: Annotations(also known as metadata)provide a formalized way to add information to your code so that you can easily use that data at some later point. Annotations are partly motivated by a general trend toward c
package com.tn.treeSet; public class Student { private String name; private int age; public Student(){} public Student(String name, int age) { super(); this.name = name; this.age = age; } public String getName() { return name; } public void setName(S
https://docs.oracle.com/javase/9/docs/api/java/util/SortedMap.html public interface SortedMap<K,V> extends Map<K,V> A Map that further provides a total ordering on its keys. The map is ordered according to the natural ordering of its keys, or