Java-对复合类型数据进行排序

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);
}
}

}