JAVA利用List集合按照某个元素对实体排序

User类

package jihe;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * @author yeqv
 * @program A2
 * @Classname User
 * @Date 2022/1/20 21:45
 * @Email w16638771062@163.com
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
    private int id;
    private int chengji;

}

Test测试类

package jihe;

import java.util.ArrayList;
import java.util.List;

/**
 * @author yeqv
 * @program A2
 * @Classname Test
 * @Date 2022/1/20 21:49
 * @Email w16638771062@163.com
 */
public class Test {
    public static void main(String[] args) {
        User user1 = new User();
        user1.setId(12);
        user1.setChengji(89);
        User user2 = new User();
        user2.setId(11);
        user2.setChengji(84);
        User user3 = new User();
        user3.setId(16);
        user3.setChengji(49);
        List<User> list = new ArrayList<>();
        list.add(user1);
        list.add(user2);
        list.add(user3);
        list.sort((a, b) -> a.getChengji() - b.getChengji());
        for (User user : list) {
            System.out.println(user);
        }

    }


}

结果：按照成绩排