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Asked: 2026-05-11T13:40:42+00:00

I have a very simple batch file that lauches a Java app (Saxon) with

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I have a very simple batch file that lauches a Java app (Saxon) with the simple command ‘java net.sf.Saxon.transform...‘

This app requires java version 1.5.

This batch file will be used by 400+ users who each may or may not have some versions of the JRE installed on their machines.

I had thought that simply installing the most recent version of the JRE would solve the problem, but no: in some cases in our preliminary tests, although the most recent version of the JRE is installed (1.6.0_13), the command ‘java‘ calls an old Java version (1.3.1…).

What would be the simplest (but most robust) way to do the following from the batch file:

  • check which is the most recent JRE installed
  • if most recent version is >= 1.5, then use this JRE from the batch command
  • if not, tell the user to go download the most recent JRE

This should work even if there is no installed version of the JRE at all on the machine.

I have read a little about Java Webstart but am not sure it’s the simplest tool for the job. I couldn’t figure if it has to be installed, if it can run without any installed version of Java at all, etc.

What other tools are there for this?

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1 Answer

  1. I’ve never used it, but someone suggested Launch4j in another question.

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