Multiple versions of a non-exported dependency

Alex Buckley alex.buckley at
Wed Aug 31 19:50:44 UTC 2016

On 8/31/2016 12:39 PM, cowwoc wrote:
> I don't even care if you keep the current restrictions in place (allow
> only one version per layer)

There is no such restriction in the Java Platform Module System -- 
please look at java.lang.reflect.Layer. The restriction to a single 
version of each module resides in the 'java' launcher [*] because we 
don't want to change the class loading behavior of regular Java 


[*] That's not the full story, as the boot layer with the application 
loader has already been created by the time the launcher runs, but from 
the user's point of view it's all "the 'java' launcher".

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