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When I try to compile with sbt I get the error 

cannot acces org.xxx bad class file: C\:Users\xxx class file has wrong version 57.0, should be 55.0 Please remove or make sure it appears in the correct subdirectory of the classpath.

The problem is that I've set in intellij idea project sdk and project language level to java 11. Also I've checked with java -version and javac -version and they both say it's java 11.

Any ideas?

Kaspazza
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    Thank you, I had to delete all target folders from project and recompile. Now it works, thank you! – Kaspazza Mar 20 '20 at 15:46

1 Answers1

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If you have same problem:

  1. Change your java and javac version (you can check it with java --version and javac --version)

  2. In intellij file -> project structure -> under project settings: Project Here you can change project sdk

  3. Remove all target folders and recompile

Additionally: Java major versions:

Java 1.2 uses major version 46

Java 1.3 uses major version 47

Java 1.4 uses major version 48

Java 5 uses major version 49

Java 6 uses major version 50

Java 7 uses major version 51

Java 8 uses major version 52

Java 9 uses major version 53

Java 10 uses major version 54

Java 11 uses major version 55

Java 12 uses major version 56

Java 13 uses major version 57

Java 14 uses major version 58

List of Java class file format major version numbers?

Kaspazza
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