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第9回 リフレクションその３ #11

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sakai-y opened this issue Jan 27, 2017 · 4 comments
Open

第9回 リフレクションその３ #11

sakai-y opened this issue Jan 27, 2017 · 4 comments

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@sakai-y
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sakai-y commented Jan 27, 2017

2017/2/10

リフレクションによるフィールドの取得・操作
アノテーションの取得
@t-kunou t-kunou mentioned this issue Feb 10, 2017
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@sakai-y
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sakai-y commented Feb 10, 2017

  • static finalでもFINALフラグを落とせば書き換えられる
  • アノテーションには"生存期間"が存在する
  • リフレクションも独自アノテーションも主にフレームワーク作成者が利用する

@sakai-y
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sakai-y commented Feb 10, 2017

リフレクションで取得したFieldのインスタンスは取得する度に異なるのでsetAccessible(false)しなくていいって話
http://hhelibex.hatenablog.jp/entry/20100221/1266726908

@sakai-y
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sakai-y commented Feb 10, 2017

みんな大好きlombokの@DataはRetentionPolicy.SOURCE

@t-kunou
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t-kunou commented Feb 10, 2017

~ はビット反転の演算子。組み込みではよく使う。

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@t-kunou @sakai-y