java题目不会做，求助整个题目代码

Question

1、新建一个项目，项目名为“学号姓名拼音”，在项目下新建包，包名为test.
学号姓名（013117113xujiayi）

  2、定义一个Student类，包含name、age、gender、 score等属性，以及必要的构造方法、print Stu Info()方法(用于输出学生的所有信息): .

3、定义ManageClass.类，类中的成员变量是Student 类型的数组，以及必要的构造方法、setStu()方法(用于设置属性值)、sort Score()方法(用于对全班同学按照成绩进行由高到低的排名)、output. StuInfo()(输出|全班同学的所有信息): +

  4、定义MainClass主类，在主类中构造对象，测试定义的类和方法、

Answer 1

public class Student {
    private String name;
    private int age;
    private String gender;
    private int score;

    public Student(String name, int age, String gender, int score) {
        this.name = name;
        this.age = age;
        this.gender = gender;
        this.score = score;
    }

    public void printStuInfo() {
        System.out.println("Name: " + name);
        System.out.println("Age: " + age);
        System.out.println("Gender: " + gender);
        System.out.println("Score: " + score);
    }
}
public class ManageClass {
    private Student[] students;

    public ManageClass(Student[] students) {
        this.students = students;
    }

    public void setStu(int index, String name, int age, String gender, int score) {
        students[index] = new Student(name, age, gender, score);
    }

    public void sortScore() {
        Arrays.sort(students, (a, b) -> b.getScore() - a.getScore());
    }

    public void outputStuInfo() {
        for (Student student : students) {
            student.printStuInfo();
            System.out.println();
        }
    }
}
public class MainClass {
    public static void main(String[] args) {
        Student[] students = new Student[3];
        ManageClass manageClass = new ManageClass(students);

        manageClass.setStu(0, "张三", 20, "男", 90);
        manageClass.setStu(1, "李四", 21, "女", 80);
        manageClass.setStu(2, "王五", 22, "男", 70);

        manageClass.sortScore();
        manageClass.outputStuInfo();
    }
}