Warning: Cannot use jsr199 Javac from jrt-fs.jar"

Keimpe Bronkhorst keimpe.bronkhorst at oracle.com
Thu Oct 8 21:08:49 UTC 2015


I'm running JDeveloper with jigsaw build 
1.9.0-ea-jigsaw-nightly-h3477-20150929-b83. Compiling in-process using 
JSR199 with a Javac from JDK8 tools.jar is working fine.


On 10/8/2015 2:27 PM, Alan Bateman wrote:
> On 08/10/2015 20:45, Keimpe Bronkhorst wrote:
>> Alan,
>> If the user's project's JDK has a higher version than the JDK of 
>> JDeveloper, the compile is done out-of-process. Otherwise an 
>> in-process JSR199 is attempted.
>> Yes, -source/-target/-Xbootclasspath (and now -release) for 
>> cross-compiling is another way, but it doesn't use the Javac of the 
>> user's project's JDK. The user can easily set up a cross-compile in 
>> JDeveloper, but some users want to use the actual Javac of their 
>> project's JDK.
> I don't want to comment on trying to mixing different versions of JDK 
> modules in the same VM but I'm curious whether your loading of 
> tools.jar in the target VM continues to work when you run it on jake 
> and when targeting a JDK 8 or older. I would expect it should work as 
> before, assuming of course that your custom class loader that is 
> loading from the targets tools.jar isn't doing parent-first 
> delegation. The latter point is important because a consequence of the 
> JEP 220 work is that types that were previously in tools.jar are 
> always visible when running a class path application on the JDK.
> -Alan

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