super的使用

package com.bjsxt.oop.extendz;

import java.util.List;

public class Demo {
	public static void main(String[] args){
		Person p = new Person();
		p.show();
		
		Student s = new Student();
		s.show();
		s.show2();
		Student s2 = new Student(2);
		s2.show();
		s2.show2();
		
	}
	
}
class Person{
	
	public int value;
	public Person() {}
	public Person(int value) {
		this.value = value;
	}
	public void show() {
		value = 12;
		System.out.println("father---show()"+value);
	}
	public void show2() {
		//value = 12;
		System.out.println("father---show2()"+value);
	}
}
class Student extends Person{
	public int value;
	
	public Student() {}
	public Student(int value) {
		super(value);
	}
	
	public void show() {
		value=13;
		System.out.println("son----show()"+value);
	}
	public void show2() {
		super.value = 12;
		super.show2();//调用父类show2方法
		System.out.println(super.value);
	}
}