面向对象09什么是继承

package com.oop;

import com.oop.demo05.Student;

public class Application {
    public static void main(String[] args) {




        Student student = new Student();

        student.say();

        student.setMoney(100000000);
        System.out.println(student.getMoney());



    }

package com.oop.demo05;

//Person  人 : 父类
//在Java中，默认都继承object类
public class Person {

    //public
    //protected 受保护的
    //private 无法继承
    //default 默认的

    private int money = 10_0000_0000;

    public void say(){
        System.out.println("说了一句话");
    }

    public int getMoney() {
        return money;
    }

    public void setMoney(int money) {
        this.money = money;
    }
}

}

package com.oop.demo05;

//学生    is      人 ：派生类、子类
//子类继承了父类，就会拥有父类的全部方法！
public class Student extends Person{
}

package com.oop.demo05;

//Teacher   is     人：派生类、子类
public class Teacher extends Person{
}