Source of the problem
Error report when starting Tomcat
Solve the problem of changing the settings in idea
Correct setting 
wrong setting 
this will lead to problems in compilation, because the default setting is consistent with the language level
Read More:
- Idea error: error: Java: error: release 5 is not supported
- Error: Java: error: release version 5 not supported solution to run error
- appear Error:java : javacTask: source release 1.7 requires target release 1.7
- Java in idea: warning: source release 11 needs to be resolved by target release 11
- Error: (44,73) lambda expression and XML are not supported in Java: – source 1.7 Error:java : Compilation failed
- IntelliJ idea error: error: Java does not support release 5
- javac Task Error source release 1.7 requires target release
- An error is reported when executing MVN. The diamond operator is not supported in source-1.5
- Android studio reported an error in the release package: Lint found fatal errors while assembling a release target
- Springcloud Feign Upload MultipartFile Error: Current req is not a multipart request Content type not supported
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- When feign is called, the solution of request method ‘post’ not supported appears
- fatal: protocol ‘https‘ is not supported
- Error starting day: SELinux is not supported with the overlay 2
- Authentication error occurred on remote connection, the required function is not supported
- The key “target densitydpi” is not supported
- Assignment under multiple single edges is not supported for synthesis
- ERROR: pygame-1.9.2-cp35-cp35m-win32.whl is not a supported wheel on this platform.
- The Excel connection manager is not supported in the 64-bit version of SSIS [Switch]
- tf.gradients is not supported when eager execution is enabled. Use tf.GradientTape instead.