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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1
章 デザインパターン入門
you are here
3
ジョー
すべてのサブ
クラスが
fly()
を継承
ジョーが追加した
メソッド
経営幹部は、ライバル会社を打ち負かすためにこのシ
ミュレータに必要なのは、空飛ぶカモだと決断しました。
そしてもちろん、ジョーの上司は、ジョーが
1
週間で問題
なく改良できると経営幹部に報告しました。「何と言って
も、ジョーは
OO
プログラマなのですから、そんなことは
簡単です。」
しかし、カモが「飛ぶ」ようにする
必要が出てきてしまった
他の
Duck
型
Duck
quack()
swim()
display
()
fly()
//
カモに関する他のメソッド
display() {
//
マガモ（
mallard
）
//
の表示
}
MallardDuck
display() {
//
アメリカホシハジロ
//
（
redhead
）の表示
}
RedheadDuck
必要なもの
Duck
クラスに
fly()
メソッドを追加
すればいいのさ。そうすればすべて
のカモが継承できるからね。いまこそ
僕の
OO
の才能の見せ所だな。
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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.