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
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.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.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.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.
598
14
章
Bridge
パターン
Bridge
パターン
実装だけでなく抽象も変化させるために、Bridgeパターンを使
いましょう。
シナリオ
人間工学に基づいた使いやすい新しいテレビリ
モコン用のコードを書いているとします。リモコ
ンは同じ抽象に基づいていますが、その実装は数
多くある（テレビのモデルごとに違う）ため、優
れた
OO
テクニックを使うべきだということはす
でに承知しています。
ジレンマ
リモコンの最初のユーザインタフェースは正しいものではな
いことはわかっています。実際、リモコンのユーザビリティ
データを収集しながら、何度も製品を改良していくことになる
でしょう。
したがって、リモコンが変更されるとテレビもまた変更され
るというジレンマがあります。顧客が所有する多くのテレビに
合わせて実装を変えられるように、すでにユーザインタフェー
スを抽象化済みです。しかし、ユーザのフィードバックに基づ
いてリモコンを改良するので時間の経過とともにその抽象も変
わるため、抽象を変更する必要もでてきます。
では、実装と抽象の両方を変えられるような
OO
設計をどの
ように行うのでしょうか。
すべてのリモコンは同じ
抽象を持ちます。
RemoteControl
on()
off()
setChannel()
//
他のメソッド
テレビごとに
1
つず
つ、数多くの実装が
あります。
SonyControl
on()
off()
setChannel()
//
他のメソッド
RCAControl
on()
off()
setChannel()
//
他のメソッド
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.