Intellij IDEA出現「Usage of API documented as @since 1.8+」的解決辦法

intellij 出現「Usage of API documented as @since 1.6+」 或者 「Usage of API documented as @since 1.8+」的解決辦法   File ->Project Structure->Project Settings -> 1 Project ->Project SDK和 Project language level 設置爲

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