[Java] 51. 상속에서 변수 찾기

package ex05.ch02;

class Animal {
    int i = 1;
    String name = "동물";
}

class Cat extends Animal {
    String name = "고양이";
    int age = 20;
}

class Dog extends Animal {
    String name = "강아지";
    int age = 10;
}

public class ExVar01 {
    public static void main(String[] args) {
        Animal a1 = new Animal(); // [animal]
        System.out.println(a1.i + "," + a1.name);

        Dog a2 = new Dog(); // [animal, dog]
        System.out.println(a2.i + "," + a2.name); // animal의 int i를 물려 받음.

        Animal a3 = new Dog();
        System.out.println(a3.i + "," + a3.name);

        Cat a4 = new Cat();
        System.out.println(a4.i + "," + a4.name);

        Animal a5 = new Cat();
        System.out.println(a5.i + "," + a5.name);

        Animal a6 = new Cat();
        System.out.println(a6.i + "," + a6.age); // 오류 부모가 자식의 멤버를 직접 접근할 수 없기 때문에.
    }
}