Java笔记：继承

class Plain {
    int length;
    int width;

    Plain(int length, int width) {
        this.length = length;
        this.width = width;
    }
}

class Stereo extends Plain {
    int height;

    Stereo(int length, int width, int height) {
        super(length, width);
        this.height = height;
    }
}

class Solution {
    public static void main(String[] args) {
        Plain plain = new Stereo(1, 2, 3);
        System.out.println(plain.length + " " + plain.width);
    }
}