Box1_Box2_Box3_Java

/* 郭翔宇：使用Java物件導向概念實作能接收 1 2 3 號球的box1，只能接收 2 3 號球的box2，只能接收 3 號球的box3。 */
/*
黃珍珍10

黃珍珍‎Taiwan 程式語言讀書會 [JAVA,C,C++,C#,VB...等不拘]
35分鐘 ·

想請問一個邏輯問題轉成程式 (程式我是用java寫)
"這真的不是作業" 是我寫的程式裡有一小段這種邏輯 但我把它轉成箱子跟球的問題

題目：
有編號123的箱子
1號可以放編號123的球
2號可以放編號23的球
3號只能放編號3

想請問若今天有很多顆 可以重複的球
要如何擺才能讓球的數字加起來最大呢？
https://www.facebook.com/photo.php?fbid=603186333433235&set=gm.2232585740289016&type=3&theater&ifg=1
 */
 /*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author Kuo, Hsiang-Yu
 */
class Three {

    int id = 3;
}

class Two extends Three {

    int id = 2;
}

class One extends Two {

    int id = 1;
}

public class MainClass {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        int sum = 0;
        One one = new One();
        Two two = new Two();
        Three three = new Three();

        System.out.println("box1(one) = " + box1(one));
        System.out.println("box1(two) = " + box1(two));
        System.out.println("box1(three) = " + box1(three));

        System.out.println("box2(one) = " + box2(one));
        System.out.println("box2(two) = " + box2(two));
        System.out.println("box2(three) = " + box2(three));

        System.out.println("box3(one) = " + box3(one));
        System.out.println("box3(two) = " + box3(two));
        System.out.println("box3(three) = " + box3(three));
    }

    private static int box1(Three three) {
        //throw new UnsupportedOperationException("Not supported yet.");
        //To change body of generated methods, choose Tools | Templates.
        /* 編號1的箱子，可以放編號 1 2 3 的球 */
        if (three instanceof One) {
            One one = (One) three;
            return one.id;
        } else if (three instanceof Two) {
            Two two = (Two) three;
            return two.id;
        } else {
            return three.id;
        }
    }

    private static int box2(Three three) {
        //throw new UnsupportedOperationException("Not supported yet.");
        //To change body of generated methods, choose Tools | Templates.
        /* 編號2的箱子，可以放編號 2 3 的球 */
        if (three instanceof One) {
            /* 編號2的箱子拒絕接受 1號球，所以回傳0 */
            System.out.println("box2 拒絕 1號球。");
            return 0;
        } else if (three instanceof Two) {
            Two two = (Two) three;
            return two.id;
        } else {
            return three.id;
        }
    }

    private static int box3(Three three) {
        //throw new UnsupportedOperationException("Not supported yet.");
        //To change body of generated methods, choose Tools | Templates.
        /* 編號3的箱子，可以放編號 3 的球 */
        if (three instanceof One) {
            /* 編號3的箱子拒絕接受 1號球，所以回傳0 */
            System.out.println("box3 拒絕 1號球。");
            return 0;
        } else if (three instanceof Two) {
            /* 編號3的箱子拒絕接受 2號球，所以回傳0 */
            System.out.println("box3 拒絕 2號球。");
            return 0;
        } else {
            return three.id;
        }
    }
}