这个好难写了几次都是错误的

创建一个Student类，其成员变量name（姓名），age（年龄），sex（性别）为私有变量，成员方法：say()、无参和带1个参、2个参和3个参的构造方法Student()
在主方法中使用new 创建四个Student对象stu1、stu2、stu3和 stu4;
通过调用无参构造方法实现对stu1三个属性赋值；
通过调用1个参的构造方法实现对stu2三个属性赋值；
通过调用2个参的构造方法实现对stu3三个属性赋值；
通过调用3个参的构造方法实现对stu4三个属性赋值；
调用stu1、stu2、stu3和 stu4的say（）方法.

public class Student {
    private String name;
    private int age;
    private String sex;
 
    public Student() {}
 
    public Student(String name) {
        this.name = name;
    }
 
    public Student(String name, int age) {
        this.name = name;
        this.age = age;
    }
 
    public Student(String name, int age, String sex) {
        this.name = name;
        this.age = age;
        this.sex = sex;
    }
 
    public void say(){
        System.out.println("学生会说话");
    }
 
    public static void main(String[] args) {
        Student stu1 = new Student();
        Student stu2 = new Student("张三");
        Student stu3 = new Student("李四",20);
        Student stu4 = new Student("王五",20,"男");
 
        stu1.say();
        stu2.say();
        stu3.say();
        stu4.say();
    }
}

运行结果：

public class Student {
    private String name;
    private int age;
    private String sex;

    public Student() {
    }

    public Student(String name) {
        this.name = name;
    }

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

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

    public void say(){
        System.out.println(this);
    }

    public static void main(String[] args) {
        Student stu1 = new Student();
        Student stu2 = new Student("张三");
        Student stu3 = new Student("李四",18);
        Student stu4 = new Student("王五",20,"男");

        stu1.say();
        stu2.say();
        stu3.say();
        stu4.say();
    }
}

这代码不是可以自动生成吗
最多写个say方法