I have to create a Java 9 modularized jar file programmatically.

I noticed, that the compiled module-info.class file gets modified (main-class, 
module-version and modules-hash) by the jar command line tool (using 

Unfortunately, neither the ModuleInfoExtender itself nor the used asm-lib is 
exported to allow external use. Is it planned to change this in the final 
release of Java 9?

I think, it is a bit scary, that the binary version of module-info.class gets 
manipulated to create a jar file. Having to re-implement this functionality in 
3rd party tools (like Ant, Maven, Gradle, etc.) doesn’t make it better ;-)



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