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.
5
章
Singleton
パターン
you are here
183
チョコレート工場に戻ると…
マルチスレッド問題の原因究明をしている間に、チョコレートボイラーの清掃が
完了し、稼動準備が整いました。しかしその前に、マルチスレッドの問題を解決し
ておかなければいけません。いくつかの解決策がありますが、いずれも異なるトレー
ドオフを伴います。どの方法を採用しましょうか？
おめでとうございます！
チョコレート工場の問題は解決し、
Choc-O-Holic
社はボイラーコードに適用できる
新たな専門知識が得られて満足しています。マルチスレッド問題にどの解決策を適用
したにせよ、ボイラーはこれ以上事故を起こさない優れた状態となりました。おめで
とうございます。この章では、
2000
リットルのホットチョコレートの流出を何とか免
れただけでなく、
Singleton
で起こりうる問題をすべて理解することもできました。
それぞれの解決策について、チョコレートボイラーのコー
ド修正の問題に対する適用可能性を書いてみましょう。
getInstance()
メソッドの同期化
先行インスタンス化の使用
二重チェックロッキング
184
5
章
Singleton
に関する
Q&A
に答えます
Q
：たった
1
つのクラスを持つ簡単なパ
ターンなのに、
Singleton ...
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.