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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BufferedInputStream
と
ZipInputStream
はどちらも
FilterInputStream
を拡張し、
FilterInputStream
は
InputStream
を拡張しています。
InputStream
は抽象デコレータク
ラスの役割を果たします。
FileInput
Stream
ByteArrayInput
Stream
FilterInput
Stream
StringBufferIn
putStream
InputStream
InflatorInputStreamDataInputStreamBufferedInputStreamPushbackInputStream
これは抽象コンポーネントです。
FilterInputStream
は抽象デコレータです。
最後に、これらはすべて具象デコレータです。
スターバズの設計とあまり違いはありません。これで
java.io API
のマニュ
アルを読めば、さまざまな入力ストリームに対してデコレータを作成できる
はずです。
また、出力ストリームもスターバズの設計とほとんど変わりません。文字
ベースのデータ用の
Reader
や
Writer
ストリームが、ストリームクラスの設計
と非常によく似ていることにもすでに気付いているでしょう（多少の違いや
矛盾はありますが、仕組みを理解する上では問題にならないほど似ています）。
しかし、
Java I/O
は
Decorator
パターンの欠点の
1
つも指摘しています。こ
のパターンを使った設計では小さなクラスが大量に作成されてしまうことが ...
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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.