public class Test {
    public static void main(String[] args) {
        Student student = new Student("肖捷", 28);
        student.show();
        Undergraduate undergraduate = new Undergraduate("***", 29, "经济学");
        undergraduate.show();
    }
class Student {
    private String name;
    private int age;
    Student (String name, int age){
        this.name = name;
        this.age = age;
    protected void show() {
        System.out.println("学生名字是：" + name);
        System.out.println("该学生的年龄是：" + age);
    }
class Undergraduate extends Student{
    private String degree;
    Undergraduate(String name, int age, String degree) {
        super(name, age);
        this.degree = degree;
    }
    
    protected void show() {
        super.show();
        System.out.println("该学生的学位是：" + degree);
    }
}