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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気象観測アプリケーションの概要
さっそく開発する気象観測アプリケーションを検討してみましょう。
Weather-O-
Rama
社から提供されるものと、私たちが開発または拡張する必要があるものの両方
を検討します。このシステムは
3
つの構成要素からなります。気象観測所（実際の気
象データを取得する物理デバイス）、気象観測所から来るデータを監視して表示を更
新する
WeatherData
オブジェクト、そしてユーザに現在の気象状況を示す表示デバイ
スです。
WeatherData
オブジェクト
気象観測所
表示デバイス
気温センサー
湿度センサー
気圧センサー
データを取得
表示
現在の
気象状況
気温：
72
度
湿度：
60%
気圧：
WeatherData
オブジェクトは
Weather-O-Rama
社が作成したもので、実際の気象
観測所とやり取りして更新された気象データを取得するのはこの
WeatherData
オブ
ジェクトです。私たちは、
WeatherData
オブジェクトを使って、表示を更新する方
法を知る必要があります。
Weather-O-Rama
社のソースコードにその方法のヒント
があるのではないかと期待しています。私たちには、現在の気象状況（気温、湿度、
気圧）、気象統計データ、簡単な予報という
3
つの異なる表示要素を実装する責任が
あるのです。
つまり、この仕事を引き受けるなら、私たちの仕事は
WeatherData
オブジェクト
を使って、現在の気象状況、気象統計データ、予報という
3
つの表示を更新するア
プリケーションを作成することです。 ...
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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.