Shulou(Shulou.com)06/01 Report--

In the actual development process, perhaps due to the needs of the project, we need to change the version of JDK. However, an error will be reported after replacement, as follows:

Java compiler level does not match the version of the installed Java project facet.

Solution:

Step 1: set the eclipse JDK version

Windows---- > Preferences---- > Java---- > Installed JREs

Step 2: set the compiled version of JDK

Windows---- > Preferences---- > Java---- > Compiler

Step 3: right-click the project and set the JDK version of the project to the unified one above

Right-click the project-> Properties---- > Java Compiler

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