Java compiler level does not match the version of the installed Java Project Facet solution

Project appears Java compiler level does not match the version of the installed Java Project facet error, which is typically caused by an inconsistent environment version of the project migration.

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Solution:

Under Explorer, locate the directory where the project resides, and in the. Settings subdirectory, open the Org.eclipse.wst.common.project.facet.core.xml configuration file with a text editor:

Modify the Red Draw line section to keep it consistent with the compiler version settings for the project.

To view the compiler version settings for your project, in the eclipse environment, right-click the project, tap Properties, select Java Compiler, and you can see the compiler version on the right side of the window:

Java compiler level does not match the version of the installed Java Project Facet solution