各位大神 解解题 帮帮忙

第一题代码如下：

public class Stu {
    private int id;
    private String name;
    private String gender;
    private int age;
    private double height;
    private double weight;

    public Stu() {
    }

    public Stu(int id, String name, String gender, int age, double height, double weight) {
        this.id = id;
        this.name = name;
        this.gender = gender;
        this.age = age;
        this.height = height;
        this.weight = weight;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public double getHeight() {
        return height;
    }

    public void setHeight(double height) {
        this.height = height;
    }

    public double getWeight() {
        return weight;
    }

    public void setWeight(double weight) {
        this.weight = weight;
    }

    public void study(Stu stu){
        System.out.println(stu.getName()+"在学习");
    }
    public void introduce(Stu stu){
        System.out.println("大家好，我叫"+stu.getName()+"今年"+stu.getAge()+"岁啦");
    }

    public static void main(String[] args) {
        Stu stu=new Stu(1,"张三","男",20,180,70.6);
        stu.study(stu);
        stu.introduce(stu);
    }
}

运行截图：

第二题和第一题一样套路，如果对你有帮助记得采纳一下，谢谢 

我帮你写，需要点时间。

你这个应该是面向对象的那一节吧，创建对象，设置属性，然后封装，生成构造方法，编写自定义方法，编写主函数main，调用构造方法创建对象，然后调用对象.自定义方法()  即可