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Eclipse Project Boundary Environment

Even if I checked this post and tried the solution on it, the problem still exists.

The Java compiler level does not match the version of the installed aspect of the Java project. Project Name Unknown grant project issue (Java version mismatch)

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4 answers

Eclipse refuses the decision.
Just right-click on the problem, in the "Problems" view, select "Quick Fix" and run with a different version that I used to run.

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Go to the project properties, check the "Project Boundaries" section, set the correct JRE

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on the project properties and go to the project faces, at this moment you should change the java version, just right-click on java and go to the previous version. or go to the Java build path, change the server libraries, or go to the server and change the server. if this is not a problem problem

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First of all, right-click your project, and then go to the java compiler, check the compiler compliance level, correct the correct version of java.

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