学生成绩排名

package hello;

import java.util.Comparator;
import java.util.HashSet;
import java.util.Random;
import java.util.Scanner;
import java.util.TreeSet;

public class Test02 {

    public static void main(String[] args) {
        TreeSet<Student> ts=new TreeSet<Student>(new Comparator<Student>() {

            @Override
            public int compare(Student o1, Student o2) {
                // TODO Auto-generated method stub
                int num=o1.getSum()-o2.getSum();
                int num2=num==0?o1.getChinese()-o2.getChinese():num;
                int num3=num2==0?o1.getMath()-o2.getMath():num2;
                int num4=num3==0?o1.getEnglish()-o2.getEnglish():num3;
                return num4;
            }
            
        });
        
        for(int x=1;x<=5;x++){
            Scanner sc=new Scanner(System.in);
            System.out.println("请输入第："+x+"学生的名称");
            String name=sc.nextLine();
            System.out.println("请输入语文成绩：");
            String chineseString=sc.nextLine();
            
            System.out.println("请输入数学成绩：");
            String mathString=sc.nextLine();
            
            System.out.println("请输入英语成绩：");
            String englishString=sc.nextLine();
            
            Student s=new Student();
            s.setName(name);
            s.setChinese(Integer.parseInt(chineseString));
            s.setMath(Integer.parseInt(mathString));
            s.setEnglish(Integer.parseInt(englishString));
            
            ts.add(s);
        }
        System.out.println("录入完毕");
        for(Student s:ts){
            System.out.println(s.getName()+"\t"+s.getChinese()+"\t"+s.getMath()+"\t"+s.getEnglish());
        }
    }
}