[Solved] Error:java: error: release version 5 not supported & Switch Unrecognized String


There will be such a problem when importing project and build from other places

At present, the local is openjdk11.0.2

Change the idea configuration as follows

File > Settings

If STR in switch is string type, the following two parts should be changed:

File > project structure

However, when the POM changes and rebuilds, the above three settings will automatically change back to the default settings, so the & lt; project> Add the Maven compiler plugin plug-in, and specify the JDK version to be used by JDK (I currently use openjdk 11.0.2, and I find that it’s OK to directly configure an 11, and the settings in the above three places will automatically change to the 11 option)


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