April 2022
Beginner to intermediate
344 pages
9h 32m
Japanese
Content preview from はじめての設計をやり抜くための本 第2版 概念モデリングからアプリケーション、データベース、アーキテクチャ設計、アジャイル開発まで
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AudioOutputFactoryクラスがシングルトンになることで、Tuner クラス
も変更されます。
public class Tuner {
private AudioOutput audioOutput;
public Tuner() {
AudioOutputFactory factory =
AudioOutputFactory.getInstance();
// AudioOutputFactoryに委譲
this.audioOutput = factory.create();
}
public void sound(AudioOutputStream
audioOutputStream) {
this.audioOutput.sound(audioOutputStream);
}
}
TunerクラスはAudioOutputFactoryクラスに依存しているので、Audio
OutputFactoryクラスの変更がTunerクラスに影響するのは当たり前かも
しれません。しかし、Tunerクラスにしてみれば、ほしいのは AudioOutput
クラスのインスタンスだけです。それであれば、 のクラス図のよう
に、ファクトリクラスとTunerクラスの依存関係を逆にすることもできま
す。Tunerクラスには setAudioOutput メソッドがあり、ファクトリクラス
からAudioOutputインターフェイスを実装したインスタンスを渡してもら ...
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and much more.
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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.