TreeSet学生成绩排序

package com.czie.iot1913.lps.itheima03;

import java.util.Comparator;
import java.util.TreeSet;

/**
 * @author 1944900433@qq.com
 * @date 2022-03-18 22:55
 */
public class TreeSetDemo {
    public static void main(String[] args) {
        TreeSet<Student> ts = new TreeSet<>(new Comparator<Student>() {
            @Override
            public int compare(Student s1, Student s2) {
                int num=s2.getsum()-s1.getsum();
                int num2=num==0?s1.getName().compareTo(s2.getName()):num;
                return num2;
            }
        });
        Student s1 = new Student("刘品金",90,95);
        Student s2 = new Student("刘品木",80,96);
        Student s3 = new Student("刘品水",100,99);
        Student s4 = new Student("刘品火",60,98);
        Student s5 = new Student("刘品土",70,90);
        Student s6 = new Student("刘品山",70,90);
        Student s7 = new Student("刘品山",50,20);
        ts.add(s1);
        ts.add(s2);
        ts.add(s3);
        ts.add(s4);
        ts.add(s5);
        ts.add(s6);
        ts.add(s7);
        for (Student s:ts){
            System.out.println(s.getName()+","+s.getChinese()+","+s.getMath());
        }

    }
}

package com.czie.iot1913.lps.itheima03;

/**
 * @author 1944900433@qq.com
 * @date 2022-03-18 22:55
 */
public class Student {
    private String name;
    private int chinese;
    private int math;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getChinese() {
        return chinese;
    }

    public void setChinese(int chinese) {
        this.chinese = chinese;
    }

    public int getMath() {
        return math;
    }

    public void setMath(int math) {
        this.math = math;
    }

    public Student(String name, int chinese, int math) {
        this.name = name;
        this.chinese = chinese;
        this.math = math;
    }

    public Student() {
    }

    public int getsum(){
        return this.math+this.chinese;
    }
}