简单继承的实现

class Person {
	private String name;
	private int age;

	public Person() {
	}
	public Person(String name) {
		this();
		this.name = name;
	}
	public Person(String name, int age) {
		this(name);
		this.age = age;
	}

	public void setName(String name) {
		this.name = name;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public String getName() {
		return this.name;
	}
	public int getAge() {
		return this.age;
	}
}

class Student extends Person {
	private String school;

	public Student() {
		super();
	}
	public Student(String name) {
		super(name);
	}
	public Student(String name, int age) {
		super(name,age);
	}
	public Student(String name, int age, String school) {
		super(name,age);
		this.school = school;
	}

	public void setSchool(String school) {
		this.school = school;
	}
	public String getSchool() {
		return this.school;
	}

}


public class TestDemo {
	public static void main(String[] args) {
		Student s = new Student();
		s.setName("北方南");
		s.setAge(1);
		s.setSchool("幼稚园");
		System.out.println("姓名:" + s.getName() +" 年龄:" + s.getAge()
							+ " 学校：" + s.getSchool());
	}
}