[Fixed] Eclipse – Java compiler level does not match the version of the installed Java project facet

Filed Under: Java

Recently I imported a Maven project in Eclipse and changed the build path Library to work on Java 1.7. After that Eclipse shown me error in project, although there was no error shown in any files.

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

The error description was Java compiler level does not match the version of the installed Java project facet.

I also changed the project compiler compliance level to 1.7 but still error was not gone. Below screenshot shows the Problem View where this error was shown.

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

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

After some research and looking at the project properties, I was able to fix this issue. All I needed to do was to change the Java Project Facet version from 1.5 to 1.7.

Below screenshot shows the Project properties window where you can set the project facets version.

Eclipse Project Facets Settings to fix Java compiler level does not match the version of the installed Java project facet

Personally I don’t like to change anything in UI, I am more inclined to do things through terminal.

Well, there is a way to do this by editing the project settings for facets.

You will find this in org.eclipse.wst.common.project.facet.core.xml file inside .settings folder at the project root.

The original content of this file was:


<?xml version="1.0" encoding="UTF-8"?>
<faceted-project>
  <fixed facet="wst.jsdt.web"/>
  <installed facet="jst.web" version="2.3"/>
  <installed facet="wst.jsdt.web" version="1.0"/>
  <installed facet="java" version="1.5"/>
</faceted-project>

I modified it to below.


<?xml version="1.0" encoding="UTF-8"?>
<faceted-project>
  <fixed facet="wst.jsdt.web"/>
  <installed facet="jst.web" version="2.3"/>
  <installed facet="wst.jsdt.web" version="1.0"/>
  <installed facet="java" version="1.7"/>
</faceted-project>

After refreshing the project, error was gone.

Bonus Tip for Java compiler level does not match the version of the installed Java project facet

If you want to change the compiler compliance level from terminal, you need to edit below properties in org.eclipse.jdt.core.prefs file.


org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
org.eclipse.jdt.core.compiler.compliance=1.7
org.eclipse.jdt.core.compiler.source=1.7

We can change the Library also in .classpath file of the project, but that is not easy and it depends on the name configured for the Library, for example in my project classpath file, entry for JRE looks like below.


<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.launching.macosx.MacOSXType/Home">
	<attributes>
		<attribute name="owner.project.facets" value="java"/>
	</attributes>
</classpathentry>

I hope it will help someone facing this issue with project facets.

Comments

  1. Ahamed Shameem says:

    Thanks a lot!! It works!!

  2. Srikumar K says:

    thank you so much.
    i was able to resolve my issue, thanks to your article.

  3. Ranjitha says:

    Thanks a lot … It worked for me

  4. ankit says:

    thanks a lot

  5. Bulelani Mlindelwa says:

    Thanks a lot your solution worked for me too!

  6. Shashank Dahake says:

    Thanks a lot. Solution worked for me.

  7. aniketa says:

    can you plz help me. This solution does not work for me.
    I follow your instruction but in my project, the applied changes don’t make when I reopen the project facets its same as before.

    Facing same Error: Java compiler level does not match the version of the installed Java project facet. redmine-client Unknown Faceted Project Problem (Java Version Mismatch)

  8. Ramamurthy says:

    Thanks a lot. Solution worked for me.

  9. Franco says:

    …More than one year later…
    Thanks a lot!
    Your bonus tip helped me to solve the problem!

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