java--学生排名

package com.test;
import com.bean.*;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import com.bean.Student;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Random;
import java.util.Scanner;
import java.util.TreeSet;

import com.bean.Student;
public class test {

//@SuppressWarnings({ "rawtypes", "unchecked" })



public static void main(String[] args) {
	//extracted_39();
	Scanner sc =new Scanner(System.in);
	System.out.println("please int:");
	TreeSet<chengJi> ts =new TreeSet<>(new Comparator<chengJi>() {

		@Override
		public int compare(chengJi o1, chengJi o2) {
			// TODO Auto-generated method stub
			int num= o2.getSum()-o1.getSum();
			return num==0? 1 :num;
		}			
	});
	//录入五个学生
	while(ts.size()<5) {
		//将录入的字符串用逗号切割,返回同一个字符串数组,将字符串数组在二个元素转换成int数
		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]);
		//将装换后的结果封装成chengJi对象，将chengJi添加到TreeSet科技和中
		ts.add(new chengJi(arr[0],chinese,math,english));
	}
		System.out.println("排序后的学生信息：:");
		for(chengJi c:ts) {
			System.out.println(c);
		}
}

public class chengJi {
private String name;
private int chinese;
private int math;
private int english;
private int sum;
public chengJi(String name, int chinese, int math, int english) {
super();
this.name = name;
this.chinese = chinese;
this.math = math;
this.english = english;
this.sum=this.chinese+this.english+this.math;
}
public chengJi() {
super();
// TODO Auto-generated constructor stub
}
public int getSum() {
return sum;
}
public void setSum(int sum) {
this.sum = sum;
}
@Override
public String toString() {
return name+","+chinese+english+math+sum;
}

}