Configure Launch4J to use 32-bit JVM only

Question

I'm using Launch4J to start my Java application and if an x64 JRE is present on the system, Launch4J seems to prefer it.

Unfortunately my application cannot run on a 64 bit JVM because I'm loading a 32 bit DLL, which is not possible and leads to an UnsatisfiedLinkError.

Is there any way to force/trick Launch4J to use a 32 bit JVM only?

Answer 1

I encountered the same problem some time ago and forked the project, so that the User interface exposes an option to force that a 32bit JVM ought to be found, you can grab the installer of launch4j 3.0.3 with the patch from:

http://fbergmann.github.io/launch4j/files/SetupLaunch4j_3.0.3.exe

and read more here:

http://frank-fbergmann.blogspot.de/2012/11/launch4j-for-32bit.html
http://fbergmann.github.io/launch4j/

Answer 2

I have exactly the same problem : Into 64 bits environment if both 32 ans 64 bits JDK/JRE are installed this tools always detect the 64 bits version. I have patched the source (java + C++) code to make my own version and re-compile all. I add a check box to FORCE the 32 bits JDK/JRE detection into 64 bits windows environment. Just donwload the version and use it as the original one.

Version : launch4j-3.0.2-win32_Java32bitsDetection