diamond types are not supported at this language level

在intellij导入git项目之后出现 diamond types are not supported at this language level错误或者String等报错

File->Project Structure->Project之后选择Project language level为高版本即可

转载于:https://www.cnblogs.com/dream-to-pku/p/6265564.html

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lambda expressions are not supported at this language level
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diamond types are not supported at this language level

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