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my eclipse editor had an error in the last 2 days, but never before. It says

java.lang.UnsupportedClassVersionError: com/pluginswithalfa/java/takeinandout has been compiled by a more recent version of the Java Runtime (class file version 59.0), this version of the Java Runtime only recognizes class file versions up to 53.0 

I use MacOS and i am a newbie could someone please help me

  • A class has been compiled with Java 15 (class file version 59) but the editor code only supports up to Java 9 (class file version 53). – greg-449 Feb 05 '21 at 17:51
  • Oh I see the issue, But how can I upgrade my eclipse editor to edit java 15? – Ip Logging Boi Feb 05 '21 at 17:56
  • What is this 'eclipse editor'? Are you just trying to look at a class file using the standard Eclipse class editor? You would have to update to the current Eclipse 2020-12 which is the first version to have full Java 15 support. – greg-449 Feb 05 '21 at 18:01
  • Does this answer your question? [How to fix java.lang.UnsupportedClassVersionError: Unsupported major.minor version](https://stackoverflow.com/questions/10382929/how-to-fix-java-lang-unsupportedclassversionerror-unsupported-major-minor-versi) – 9ilsdx 9rvj 0lo Jun 07 '21 at 11:16

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