cant build

[delanym]

hi there. Why cant I build this?

/git/ubiq-fpe-java master ❯ echo $JAVA_HOME
/usr/lib/jvm/java-20-openjdk-amd64

/git/ubiq-fpe-java master ❯ java --version
openjdk 20-ea 2023-03-21                                                                                                                                                                                                                                  
OpenJDK Runtime Environment (build 20-ea+17-Ubuntu-2)                                                                                                                                                                                                     
OpenJDK 64-Bit Server VM (build 20-ea+17-Ubuntu-2, mixed mode, sharing)                                                 

/git/ubiq-fpe-java master ❯ ./gradlew                                                                                                                                                                             delany.middleton@traderoot.com 10:31:53 
                                                                                                                                                                                                                                                          
FAILURE: Build failed with an exception.                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                          
* Where:                                                                                                                                                                                                                                                  
Settings file '/git/ubiq-fpe-java/settings.gradle'                                                                                                                                                                                                        
                                                                                                                                                                                                                                                          
* What went wrong:                                                                                                                                                                                                                                        
Could not compile settings file '/git/ubiq-fpe-java/settings.gradle'.                                                                                                                                                                                     
> startup failed:                                                                                                                                                                                                                                         
  General error during semantic analysis: Unsupported class file major version 64                                                                                                                                                                         
                                                                                                                                                                                                                                                          
  java.lang.IllegalArgumentException: Unsupported class file major version 64                                                                                                                                                                             
        at groovyjarjarasm.asm.ClassReader.<init>(ClassReader.java:196)                                                   
        at groovyjarjarasm.asm.ClassReader.<init>(ClassReader.java:177)                                               
        at groovyjarjarasm.asm.ClassReader.<init>(ClassReader.java:163)                                                                                                                                                                                   
        at groovyjarjarasm.asm.ClassReader.<init>(ClassReader.java:284)                                                 
        at org.codehaus.groovy.ast.decompiled.AsmDecompiler.parseClass(AsmDecompiler.java:81)

[garyschneir]

Let me investigate. Is there a specific reason you need to compile file files? Our jar files are available in maven and sonatype

[garyschneir]

@delanym Looks to be a java version compatibility issue. The 64 in the message Unsupported class file major version 64 refers to Java 20, which you are using. I tried various java versions and our library compiles on java versions 11 - 15.

To determine why Java versions 16 or higher are not working properly, I need to do more research and investigate further.

Do you have the ability to downgrade your java environment to Java 11 - 15 ?

[delanym]

Ok strange, its building on 11. I started off on 17. Usually those messages mean the JDK can't handle the project, not the other way around.

I was having trouble with the JAR and wanted to make sure your unit tests run.

[ifreshwater]

@delanym Thank you for trying out our library! We are adding an issue to our backlog to investigate porting our library to Java 17, as Java 11 is ending LTS support soon. Let us know if we can help you with anything else.