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.
FlyBehavior
はすべての飛ぶ振
る舞いのクラスが実装するインタ
フェースです。新しい飛ぶ振る舞
いのクラスはすべて、
fly()
メソッ
ドを実装するだけでよいのです。
翼を持つすべてのカモに対
する飛ぶ振る舞いの実装
すべての飛べないカモに
対する実装
本当にガーガー
鳴く振る舞い
キューキューという
音を出す振る舞い
全く音を出さない
振る舞い
鳴く振る舞いに対しても同様
です。実装する必要のある
quack()
メソッドだけを含んだ
インタフェースがあります。
<<interface>>
FlyBehavior
fly()
fly() {
//
カモの飛ぶ
//
振る舞いを実装
}
FlyWithWings
fly() {
//
何もしない。
//
飛べない！
}
FlyNoWay
<<interface>>
QuackBehavior
quack()
quack() {
//
カモの鳴く
//
振る舞いを実装
}
Quack
quack() {
//
ゴムのアヒルが
//
キューキュー鳴く
}
Squeak
quack() {
//
何もしない。
//
鳴けない！
}
MuteQuack
カモの振る舞いを実装する
ここでは
FlyBehavior
と
QuackBehavior
の
2
つのインタフェースと、そ
れぞれの具体的な振る舞いを実装するクラスがあります。
そのため、継承に伴うすべ
ての負担を負うことなく、
「再利用」のメリットを享受
できます。
この設計では、飛ぶ振る舞いや鳴く振る舞いがDuck のサブ
クラス内に隠蔽されなくなるので、別の型のオブジェクト
が振る舞いを再利用できます！ ...
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.