Scala error "Unsupported major.minor version 52.0" when my java version is already 8

Question

This is my screen print:

[user@host ~]$ scala
Exception in thread "main" java.lang.UnsupportedClassVersionError: scala/tools/nsc/MainGenericRunner : Unsupported major.minor version 52.0
        at java.lang.ClassLoader.findBootstrapClass(Native Method)
        at java.lang.ClassLoader.findBootstrapClassOrNull(ClassLoader.java:926)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:297)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:295)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Could not find the main class: scala.tools.nsc.MainGenericRunner.  Program will exit.

But my java and javac version all updated to latest:

[user@host ~]$ javac -version
javac 1.8.0_162
[user@host ~]$ java -version
java version "1.8.0_162"
Java(TM) SE Runtime Environment (build 1.8.0_162-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.162-b12, mixed mode)

My JAVA_HOME is set. And PATH is set with /path/to/scala/bin, /path/to/jdk1.8.0_162/bin and /path/to/jdk1.8.0_162/jre/bin.

What could be the issue?

Answer 1

You are trying to compile in the higher version, and running in the lower version that’s why you are getting the error.

In intelliJ IDEA,

1.Go to maven Settings -> Maven -> lmporting. Set JDK for importer to 1.8

2.Go to Maven Settings → Maven → Runner. Set the JRE to 1.8.

3.Go to menu File* → Project Structure → SDKs. Make sure the JDK home path is set to 1.8.

Restart IntelliJ IDEA.