Java类与对象，构造方法，成员变量

Question

按以下要求编程

 

    (1)创建一个Person类，具有成员变量：姓名，年龄，两个重载的构造方法（一个参数为空，一个为两个参数）为成员变量初始化。

 

    (2)再创建两个类Student和Teacher，均继承于Person类，其中Student类增加了班级和学号，Teacher类增加了工号和所属学院，分别定义构造方法设置相应成员变量的信息，并重写toString方法输出相应的信息。

 

    (3)创建测试类测试结果并输出。

Answer 1

public class Person {
	private String name;
	private int age;
	
	public Person() {
		
	}
	
	public Person(String name,int age) {
		this.name = name;
		this.age = age;
	}
	
	@Override
	public String toString() {
		return "姓名:"+name+",年龄:"+age;
	}
}

public class Student extends Person{
	private String className;
	private int num;
	
	public Student(String name,int age,String className,int num) {
		super(name,age);
		this.className = className;
		this.num = num;
	}
	
	@Override
	public String toString() {
		return super.toString()+ ",班级:"+className+",学号:"+num;
	}
}

public class Teacher extends Person{
	private int jobNum;
	private String college;
	
	public Teacher(String name,int age,int jobNum,String college) {
		super(name,age);
		this.jobNum = jobNum;
		this.college = college;
	}
	
	@Override
	public String toString() {
		return super.toString()+",工号:"+jobNum+",学院:"+college;
	}
}

public static void main(String[] args) {
		// TODO Auto-generated method stub

		Person student = new Student("张三",16,"高三1班",23);
		Person teacher = new Teacher("李四",45,1697,"xxx高级中学");
		
		System.out.println(student.toString());
		System.out.println(teacher.toString());
	}