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

TK Gospodinov answer is correct even for maven projects. Beware: I do use Maven. The pom was correct and still got this issue. I went to "Project Facets" and actually removed the Java selection which was pointing to 1.6 but my project is using 1.7. On the right in the "Runtimes" tab I had to check the jdk1.7 option. Nothing appeared on the left even after I hit "Apply". The issue went away though which is why I still think this answer is important of the specific "Project Facets" related issue. After you hit OK if you come back to "Project Facets" you will notice Java shows up as version 1.7 so you can now select it to make sure the project is "marked" as a Java project. I also needed to right click on the project and select Maven|Update Project.

Examples related to eclipse

How do I get the command-line for an Eclipse run configuration? My eclipse won't open, i download the bundle pack it keeps saying error log strange error in my Animation Drawable How to uninstall Eclipse? How to resolve Unable to load authentication plugin 'caching_sha2_password' issue Class has been compiled by a more recent version of the Java Environment Eclipse No tests found using JUnit 5 caused by NoClassDefFoundError for LauncherFactory How to downgrade Java from 9 to 8 on a MACOS. Eclipse is not running with Java 9 "The POM for ... is missing, no dependency information available" even though it exists in Maven Repository The origin server did not find a current representation for the target resource or is not willing to disclose that one exists. on deploying to tomcat

Examples related to maven

Maven dependencies are failing with a 501 error Why am I getting Unknown error in line 1 of pom.xml? Why am I getting "Received fatal alert: protocol_version" or "peer not authenticated" from Maven Central? How to resolve Unable to load authentication plugin 'caching_sha2_password' issue Unable to compile simple Java 10 / Java 11 project with Maven ERROR Source option 1.5 is no longer supported. Use 1.6 or later 'react-scripts' is not recognized as an internal or external command How to create a Java / Maven project that works in Visual Studio Code? "The POM for ... is missing, no dependency information available" even though it exists in Maven Repository Java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/exc/InvalidDefinitionException

Examples related to m2eclipse

web.xml is missing and <failOnMissingWebXml> is set to true How to solve maven 2.6 resource plugin dependency? No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK? An internal error occurred during: "Updating Maven Project". java.lang.NullPointerException An internal error occurred during: "Updating Maven Project". Unsupported IClasspathEntry kind=4 Maven "build path specifies execution environment J2SE-1.5", even though I changed it to 1.7 Failed to resolve version for org.apache.maven.archetypes Could not calculate build plan: Plugin org.apache.maven.plugins:maven-resources-plugin:2.5 or one of its dependencies could not be resolved How to deal with missing src/test/java source folder in Android/Maven project? SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". error