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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542
12
章
心臓モデルをテストする
% java HeartTestDrive
%
ファイル 編集 ウィンドウ ヘルプ 脈拍を調べてください
これを実行
すると、
これが表示されます。
この表示と心臓との相性は抜群です！
ビートバーはちょうど脈拍
のように見えます。
HeartModel
も
BPM
オブザーバとビートオ
ブザーバをサポートしているので、
DJ
のビートの場合と同様に脈
拍を更新できます。
心拍の自然な変動にしたがって、表示が新しい
BPM
（心拍数）で
更新されます。
BPM
が更新されるたびに、アダプタは
getBPM()
呼び出しを
getHeartRate()
呼び出しに変換しています。
［開始］と［停止］のメニュー項目は、コントローラが無効にして
いるので使えません。
他のボタンは使えますが、コントローラがこれらのボタンに対して
ノーオペレーションを実装しているので何も効果はありません。
ビューを変更して、これらの項目を無効にすることもできます。
実行すべきこと
次はテストの実行
5
4
3
2
1
適切で健康的な
心拍数
現在の
BPM
：
68
ビュー
コントロール
DJ
コントロール
BPM
を入力：
設定
you are here
543
12
章
Compound
パターン
に答えます
Q
：
MVC
の中に
Composite
パ
ターンがあるという
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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.