代码最后方法重写错了

创建和显示学生信息,具体要求如下
定义Person类,在该类中定义成员变量name(姓名)sex (性别)和 age (年龄),然后定义有参构造方法,初始成员变量,最后定义成员方法oString0返回姓名、性别和年龄信息。
定义 Student 类继承erson类,在该类中增加成员变量no(学号)、scoreEn(英语成绩)、scoreMath (数学成绩)和 screCh (语文成绩),然后增加成员方法aver、max和min分别返回三门功课的平均分、最育分和最低分,最后重写 toString方法返回姓名、性别、年龄、学号、平均分、最高分和最低信息。
定义 StudentTest 类在 main0方法中实现创建和显示学生信息


class Person {
    String name;
    String sex;
    int age;

    public Person(String name, String sex, int age) {
        this.name = name;
        this.sex = sex;
        this.age = age;
    }

    public String toString() {
        return "姓名:" + name + ",性别:" + sex + ",年龄:" + age;
    }
}

class Student extends Person {
    String no;
    int scoreEn;
    int scoreMath;
    int scoreCh;

    public Student(String name, String sex, int age, String no, int scoreEn, int scoreMath, int scoreCh) {
        super(name, sex, age);
        this.no = no;
        this.scoreEn = scoreEn;
        this.scoreMath = scoreMath;
        this.scoreCh = scoreCh;
    }

    public double aver() {
        return (scoreEn + scoreMath + scoreCh) / 3.0;
    }

    public int max() {
        int max = scoreEn > scoreMath ? scoreEn : scoreMath;
        max = max > scoreCh ? max : scoreCh;
        return max;
    }

    public int min() {
        int min = scoreEn < scoreMath ? scoreEn : scoreMath;
        min = min < scoreCh ? min : scoreCh;
        return min;
    }

    public String toString() {
        return super.toString() + ",学号:" + no + ",平均分:" + aver() + ",最高分:" + max() + ",最低分:" + min();
    }
}

public class StudentTest {
    public static void main(String[] args) {
        Student stu = new Student("张三", "男", 18, "20210001", 80, 90, 70);
        System.out.println(stu.toString());
    }
}