各位帮我看看这些用JAVA怎么做

现这种基础题还是自己慢慢研究才会有进步的

一行都写不出么？

创建类都弄不出？

public class People {
    public static String className;
    private String name;
    private String sex;
    private int number;

    public void print() {
        System.out.println("班级：" + className);
        System.out.println("姓名：" + name);
        System.out.println("性别：" + sex);
        System.out.println("学号：" + number);
    }

    public People(String name, String sex, int number) {
        this.name = name;
        this.sex = sex;
        this.number = number;
    }

    public static void main(String[] args) {
        People.className = "二年级一班";
        People people = new People("张三", "男", 12580);
        people.print();
    }
}