Java - Analysis: Taking Your Software into the Real World(From goodanalysis to good classes)

Head First Object-Oriented Analysis and Design
A Brain Friendly Guide to OOA&D
(O'Reilly Media)
Brett McLaughlin (著), Gary Pollice (著)
David West (著)
邦訳
Head Firstオブジェクト指向分析設計
頭とからだで覚えるオブジェクト指向の基本
長瀬 嘉秀 (編集), 永田 渉 (編集)
株式会社テクノロジックアート (翻訳)

開発環境

• OS X Yosemite - Apple (OS)
• Emacs (CUI)、BBEdit - Bare Bones Software, Inc. (GUI) (Text Editor)
• Java (プログラミング言語)
• javac (コンパイラ)
• java (application launcher)

Head First Object-Oriented Analysis and Design: A Brain Friendly Guide to OOA&D (Brett McLaughlin (著)、 Gary Pollice (著)、 David West (著) 、 O'Reilly Media)のChapter 4. Analysis: Taking Your Software into the Real World、DESIGN PUZZLE(No. 2560)を解いてみる。

その他参考書籍

• Head First Java 第2版 ―頭とからだで覚えるJavaの基本

DESIGN PUZZLE(No. 2560)

コード(BBEdit, Emacs)

DogDoor.java

import java.util.Timer;
import java.util.TimerTask;
import java.util.List;
import java.util.ArrayList;

public class DogDoor {
    private boolean open;
    private ArrayList<Bark> barks;

    public DogDoor() {
        this.open = false;
        this.barks = new ArrayList<Bark>();
    }

    public void open() {
        System.out.println("The dog door opens.");
        open = true;
        final Timer timer = new Timer();
        timer.schedule(new TimerTask() {
                public void run() {
                    close();
                    timer.cancel();
                }
            }, 5000);
    }

    public void close() {
        System.out.println("The dog door closes.");
        open = false;
    }

    public boolean isOpen() {
        return open;
    }

    public void addAllowedBark(Bark bark) {
        this.barks.add(bark);
    }

    public List<Bark> getAllowedBarks() {
        return barks;
    }
}

入出力結果(Terminal)

$ jrun.sh DogDoorSimulator
Bruce starts barking.
 BarkRecognizer: Heard a 'rowlf'
The dog door opens.

Bruce has gone outside...
The dog door closes.

Bruce's all done...
...but he's stuck outside!
A small dog starts barking.
 BarkRecognizer: Heard a 'yip'
This dog is not allowed.
Bruce starts barking.
 BarkRecognizer: Heard a 'rooowlf'
The dog door opens.

Bruce's back inside...
The dog door closes.
$