java问题 类 参数

Question

.设计一个学生类Student和它的一个子类Undergraduate，要求如下：

(1)Student类有name和age属性，一个包含两个人参数的构造器，用于给两属性赋值，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。有一个包含三参数的构造器，前两个参数用于给集成的属性赋值，第三个参数给degree专业见值，一个show()方法用于打印Undergraduate的属性信息。

(3)在测试类中分别打印Undergraduate和Student对象，调用它们的show()

 

Answer 1

package T1;

public class Test {
	public static void main(String[] args) {
		// 有参构造
		Student stu = new Student("student", 100);
		stu.show();
		Undergraduate undergraduate = new Undergraduate("Undergraduate", 20, "本科");
		undergraduate.show();
	}

}

class Student {

	// 姓名
	private String name;

	// 成绩
	private int age;

	// 无参构造
	public Student() {
		super();
	}

	// 全参构造
	public Student(String name, int age) {
		this.name = name;
		this.age = age;
	}

	public String getName() {
		return name;
	}

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

	public double getAge() {
		return age;
	}

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

	public void show() {
		System.out.println("名字：" + this.name + "\t年龄：" + this.age);
	}

}

class Undergraduate extends Student {
	private String degree;

	public Undergraduate(String name, int age, String degree) {
		super(name, age);
		this.degree = degree;
	}

	public void show() {
		System.out.println("名字：" + super.getName() + "\t年龄：" + super.getAge() + "\t学位:" + this.degree);
	}

}