前回は、11月9日に公開されたJSR 308:Annotations on Java TypesのEarly Draftを元に、同仕様の概要を紹介した。JSR 308については本連載第15回でも取り上げているが、その際、開発段階にある対応コンパイラを用いて型に対するアノテーションの適用例を紹介した。

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