IDEA: Error:java: 无效的源发行版: 9

File -> Project Structure -> Project Settings>>Project>Project language  应与JDK吻合  

 

File -> Project Structure -> Project Settings>>Modules>Modules language

 


 File -> Settings -> Compiler -> Java Compiler -> Target bytecode version

 

posted @ 2019-06-30 12:22  陌之殇  阅读(7341)  评论(1编辑  收藏  举报