Java-对复合类型数据进行排序

Array.sort(arr)可以进行简单的排序，如果需要复杂的排序可以实现Comparable

 package com.tj;

 import java.util.Arrays;

 public class User implements Comparable<User> {

     Integer id;
     String username;
     String password;
     Integer age;

     public User(Integer id, String username, String password, Integer age) {
         this.id = id;
         this.username = username;
         this.password = password;
         this.age = age;
     }

     @Override
     public int compareTo(User o) {
         if (this.age > o.age) {
             return 1;
         } else if (this.age < o.age) {
             return -1;
         } else {
             return 0;
         }
     }

     @Override
     public String toString() {
         return this.username + "\t" + this.age;
     }

     public static void main(String[] args) {
         User[] users = new User[5];
         users[0] = new User(1,"malin1","123",10);
         users[1] = new User(1,"malin2","123",16);
         users[2] = new User(1,"malin3","123",15);
         users[3] = new User(1,"malin4","123",14);
         users[4] = new User(1,"malin5","123",11);

         Arrays.sort(users);
         for (User user : users) {
             System.out.println(user);
         }
     }

 }