B4J Question Use jar file to open Windows 10 default files

The jar file does not run by itself, it is a recognized type by Windows and it calls the Java Runtime so you can't associate it with anything.
There are packagers that will encapsulate your jar file into an exe which you could then use as the default executable for a given file type.
Look for Packager on the forum.

Personally I had problems with the Packager but better luck with http://launch4j.sourceforge.net/

Lanuch4J works ok. It can pass arguments.

xulihang said:

Lanuch4J works ok. It can pass arguments.

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I like it too but I have not managed to make it work with OpenJDK version 11. Launch4J expects to be pointed to a JRE and there is no JRE for OpenJDK 11.

Another thing I like is that it seems to resolve a strange issue. I reported before having great difficulties running the jar file produced by B4J on my corporate laptops. The IDE runs fine, the project runs fine in Debug mode but it does not run in release, something about missing the Main class file. I tried multiple corporate laptops and all do it while several personal laptops do not have problems (mix of Windows 7 and 10, 32 and 64 bits).

I have been using Launch4J at home for a little while just fine but just today, for the heck of it and without any hope, I installed Launch4J on the corporate machine (pointed it to the Oracle Java 1.8.xxx jre) and the exe runs fine!

Success, and a very large thorn off my side.

Previous attempts with the Packager and Packager11 tools did not work at all on the corporate machines.

Thanks for the replies, I think I knew that Launch4J would be the way to go. I will try it when I have the time.

I recommend you to use B4JPackager11. This is the way forward.

You will need to do a small change in B4JPackager11 code to support command line arguments: https://www.b4x.com/android/forum/t...-way-to-distribute-ui-apps.99835/#post-661745