VirtualMachine in tools.jar

Alan Bateman Alan.Bateman at
Tue Sep 1 07:40:25 UTC 2015

On 01/09/2015 05:10, Henri Tremblay wrote:
> I'm back on this topic.
> After a little experiment, it appears that VirtualMachine is available 
> by default in the JDK 9. It is in the jdk.attach module. Which I guess 
> is loaded by default.
> So, in fact, to work on JDK9, no tools.jar is needed.
tools.jar has not existed in JDK 9 builds since the integration of JEP 
220 [1]. All types that were previously in tools.jar are now visible by 
default whereas previously you would have needed to put tools.jar on the 

The jdk.attach module is not linked into the JRE image, which I think is 
what you were asking for in your original mail.



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