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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251
7
章
Adapter
パターンと
Facade
パターン
Enumeration
を
Iterator
に適合させる
<<interface>>
Enumeration
hasMoreElements()
nextElement()
<<interface>>
Iterator
hasNext()
next()
remove()
この
2
つのメソッドは単純です。
Iterator
の
hasNext()
と
next()
に素
直に対応します。
しかし、
Iterator
の
remove()
メソッ
ドはどうでしょうか？
このようなメ
ソッドは
Enumeration
にはありま
せん。
<<interface>>
Enumeration
hasMoreElements()
nextElement()
<<interface>>
Iterator
hasNext()
next()
remove()
実際には背後に
Enumeration
インタ
フェースがあっても、新し
いコードでは
Iterator
イン
タフェースを使うことがで
きます。
EnumerationIterator
hasNext()
next()
remove()
EnumerationIterator
はアダプタです。
Enumeration
イ
ンタフェースを実
装しているクラス
はアダプティです。
古いコードの
Enumeration
を、
新しいコードでは
Iterator
に見え
るようにします。
ターゲットインタフェース
アダプティインタフェース
アダプタを設計する
クラスには、ターゲットインタフェースを実装し ...
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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.