设计一个学生类Student和它的一个子类Undergraduate

5、设计一个学生类Student和它的一个子类Undergraduate
1）Student类有name(姓名)、和age(年龄)属性，一个包含两个参数的构造方法，用于给name和age属性赋值，一个show()方法打印Student的属性信息
2）本科生类Undergraduate增加一个degree(学位)属性。有一个包含三个参数的构造方法，前两个参数用于给继承的name和age属性赋值，第三个参数给degree专业赋值，一个show()方法用于打印Undergraduate的属性信息
3）在测试类中分别创建Student对象和Undergraduate对象，调用它们的show()。

class Student {public String name;public int age;public Student(String name,int age){this.name=name;this.age=age;}public void show(){System.out.println("name: "+name+" age: "+age);}}class UnderGraduate extends Student{public String degree;public UnderGraduate(String name,int age,String degree){super(name, age);this.degree=degree;}public void show(){System.out.println("name: "+name+" age: "+age+" degree: "+degree);}}public class Test01{public static void main(String[] args) {Student student = new Student("zhangsan", 16);student.show();UnderGraduate underGraduate = new UnderGraduate("lisi", 20, "bechalor");underGraduate.show();}}