要求：

1.创建学生类 并生成总成绩方法

package SetChengJi;

public class XueSheng {
String name;
int chinese;
int math;
int english;

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 int getEnglish() {
    return english;
}

public void setEnglish(int english) {
    this.english = english;
}

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

public XueSheng() {
    super();
}

public int getsum(){

    return  chinese+math+english;
}

}

2.因TreeSet集合不能存放重复数据，所有用Comparator方法完善功能

package SetChengJi;

import java.util.Comparator;

public class XueShengCompare implements Comparator {
@Override
public int compare(XueSheng x1, XueSheng x2) {
//主要条件：总分
int sum1 = x2.getsum() - x1.getsum();
//次要条件①：总分+语文成绩
int sum2 = sum10 ? x2.getChinese()-x1.getChinese() : sum1;
//次要条件②：总分+语文成绩+数学成绩
int sum3 = sum20 ? x2.getMath()-x1.getMath() : sum2;
//次要条件③：总分+语文成绩+数学成绩+英语成绩
int sum4 = sum30 ? x2.getEnglish()-x1.getEnglish() : sum3;
//次要条件④：总分+语文成绩+数学成绩+英语成绩+姓名
int sum5 = sum40 ? x2.getName().compareTo(x1.getName()) : sum4;
 

 return sum5;
}

}

3.测试类 存放数据 调动方法

package SetChengJi;

import java.util.Scanner;

import java.util.TreeSet;

public class Test {
public static void main(String[] args) {
 

        set.add(xue);


        }
    for (XueSheng xueSheng : set) {
        System.out.println("姓名："+xueSheng.getName()+"       语文成绩"+xueSheng.getChinese()+"          数学成绩"+xueSheng.getMath()
                +"         英语成绩"+xueSheng.getEnglish()+"总分："+xueSheng.getsum());
    }


}

}