June 2022
Beginner to intermediate
672 pages
17h 23m
Japanese
Content preview from Head Firstデザインパターン 第2版 ―頭とからだで覚えるデザインパターンの基本
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505
12
章
Compound
パターン
前回と同じですが、今回は
CountingDuckFactory
を使っているので、確実に
すべてのカモが装飾されて
います。
% java DuckSimulator
カモシミュレータ：抽象ファクトリ付き
ガーガー
ガーガー
ガアガア
キューキュー
ガー
カモが鳴いた回数：
4
回
%
ファイル 編集 ウィンドウ ヘルプ 卵工場
ファクトリを使った場合の出力はこうなります。
いまだに具象クラスに依存してガチョウを直接インスタンス化してい
ます。ガチョウ用の抽象ファクトリを書けますか？
どのようにして「ガ
チョウカモ」の作成を処理すべきでしょうか？
506
12
章
カモの群れ
Quackable mallardDuck = duckFactory.createMallardDuck();
Quackable redheadDuck = duckFactory.createRedheadDuck();
Quackable duckCall = duckFactory.createDuckCall();
Quackable rubberDuck = duckFactory.createRubberDuck();
Quackable gooseDuck = new GooseAdapter(new ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.