[izpack-user] Detect Java version running

jason godbold-smith

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Nov 27, 2010, 6:31:48 PM11/27/10

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HI

Once an izPack installation is running is there a way to detect and returnt he version of Java that the izPack is using?

Regards Jason

cimnine

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Nov 29, 2010, 4:23:04 AM11/29/10

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launch your installer like this:
$ java -DTRACE=true -jar installer.jar

You'll see all available variables on the right. The java version is
amongst them.

~Chris

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Dirk Räder

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Nov 29, 2010, 4:28:28 AM11/29/10

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I don't think that's what Jason wanted to do. I suppose he wanted to
find out which Java version is currently used to run IzPack. That is,
find out programmatically.

Regards, Dirk

2010/11/29 cimnine <cim...@gmail.com>:

cimnine

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Nov 29, 2010, 5:21:26 AM11/29/10

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The Java version, IMHO, is stored in one of these variables I mentioned. Same like JAVA_HOME.. Isn't it?

Julien Ponge

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Nov 29, 2010, 9:01:43 AM11/29/10

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No that one is not built-in, so you need to look at declaring an
environment variable.

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cimnine

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Nov 29, 2010, 9:26:11 AM11/29/10

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But why shouldn't you be able to access variables like 'SYSTEM_java_runtime_version' or 'SYSTEM_java_specification_version' from within the install.xml when they are defined at runtime? Files get parsed at runtime, don't they?
Maybe I have time this evening to test it out. I still think it is possible to access these vars :)

Cheers, Chris

Am 29.11.2010 15:02 schrieb "Julien Ponge" <julien...@gmail.com>:

Julien Ponge

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Nov 29, 2010, 9:27:29 AM11/29/10

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Yep :-)

http://izpack.org/documentation/installation-files.html#environment-variables

jason godbold-smith

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Nov 30, 2010, 3:58:53 PM11/30/10

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Thanks a lot, this really helped with what i was doing. The option to start-up izPAck with the DTRACE option is also invaluable piece of info to remember.

Regards

Julien Ponge

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Nov 30, 2010, 4:03:26 PM11/30/10

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Cool!

cimnine

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Nov 30, 2010, 4:27:36 PM11/30/10

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Yes it is. And it definetly is too less documented. Great I could help you.
~Chris

Am 30.11.2010 22:00 schrieb "jason godbold-smith" <jgodbo...@googlemail.com>:

Julien Ponge

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Nov 30, 2010, 4:36:48 PM11/30/10

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Well the docs can be edited from
http://docs.codehaus.org/display/IZPACK/User+documentation :-)

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