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```$ ./gradlew clean build

FAILURE: Build failed with an exception.

* Where:
Initialization script '/Users/ummalhotra/.gradle/init.gradle'

* What went wrong:
Could not compile initialization script '/Users/ummalhotra/.gradle/init.gradle'.
&gt; startup failed:
  General error during conversion: Unsupported class file major version 64

  java.lang.IllegalArgumentException: Unsupported class file major version 64
        at groovyjarjarasm.asm.ClassReader.&lt;init&gt;(ClassReader.java:199)
        at groovyjarjarasm.asm.ClassReader.&lt;init&gt;(ClassReader.java:180)
        at groovyjarjarasm.asm.ClassReader.&lt;init&gt;(ClassReader.java:166)
        at groovyjarjarasm.asm.ClassReader.&lt;init&gt;(ClassReader.java:287)
        at org.codehaus.groovy.ast.decompiled.AsmDecompiler.parseClass(```


java --version
openjdk 20 2023-03-21
OpenJDK Runtime Environment (build 20+36-2344)
OpenJDK 64-Bit Server VM (build 20+36-2344, mixed mode, sharing)

Don't use an unsupported Java version: <https://docs.gradle.org/current/userguide/compatibility.html>

gradle --version

Welcome to Gradle 8.1!

Here are the highlights of this release:
 - Stable configuration cache
 - Experimental Kotlin DSL assignment syntax
 - Building with Java 20

Exactly, "Building" (using the toolchains feature)

then which java version should i use with this gradle?

That I answered already with the first answer :wink:

Ok, got it. Java 20 and later versions are not yet supported.

But actually I tried with open jdk Java 17 as well, But I had got a similar problem with that also.

I will try again and check if java 17 works

Thanks for the help. <@URQ797WRW>

If you got a problem with 17, then please tell which exactly, details are important :slightly_smiling_face: