- project structure中的project ，SDK选择1.8，Project language level选择8
- project structure中的module，选择Language level为8
- setting中的java compiler
idea报错Diamond types are not supported at this language level
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Diamond types are not supported at language level '5'
idea language level 介绍
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TypeError: ufunc 'sqrt' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''
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react @types/react-router-dom报错
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Kotlin: Language version 1.1 is no longer supported; please, use version 1.2 or greater.