录入5名学生成绩 按总分排序

package com.heima.test;

import java.io.FileWriter;
import java.io.IOException;
import java.util.Comparator;
import java.util.Scanner;
import java.util.TreeSet;

public class Test12 {

    /**录入5名学生成绩 按总分排序 * @param args * @throws IOException */
    public static void main(String[] args) throws IOException {
        FileWriter file = new FileWriter("stu.txt");
        TreeSet<Student> ts = new TreeSet<Student>(new Comparator<Student>() {

            @Override
            public int compare(Student o1, Student o2) {
                int num = o2.getSum() - o1.getSum();
                return num == 0? 1: num;
            }
        });

        Scanner sc = new Scanner(System.in);
        System.out.println("输入5个学生的成绩（格式：名字,语文,数学,英语）： ");
        while(ts.size() < 5){
            try{
                String line = sc.nextLine();
                String arr[] = line.split(",");
                int chinese = Integer.parseInt(arr[1]);
                int math = Integer.parseInt(arr[2]);
                int english = Integer.parseInt(arr[3]);
                ts.add(new Student(arr[0],chinese,math,english));
            }catch (Exception e) {
                // TODO: handle exception
                System.out.println("输入格式有误！请重输：");
            }
        }
        System.out.println(ts);
        for (Student student : ts) {
            file.write(student.toString() + "\n");
        }
        file.close();
    }

}