B4J Question App works only if B4J IDE is installed on Windows

ranul · Nov 6, 2025

Hi,

I developed an app using B4J.
Everything is working perfect on my development computer (Dell laptop/Windows 11).
But when I try to use the app (the jar file) on other machines, the app doesn't start. Nothing happens.
The other machines are also with Windows 11 and I installed the same JRE and also JDK.
It's the same issue on a number of different machines.
The app starts to work only if I install the B4J IDE on that machine.

Thanks.

Alessandro71 · Nov 11, 2025

Project / Build standalone package
and everything will be included

Swissmade · Nov 6, 2025

How do you start your jar file?

ranul · Nov 6, 2025

Swissmade said:
How do you start your jar file?

java -jar MyApp.jar

Swissmade · Nov 6, 2025

Windows 11

Where is your IDE?

Try
C:\Program Files\Java\<YOUR IDE VERSION>\bin\Java -jar MyApp.jar

ranul · Nov 6, 2025

Swissmade said:
Windows 11

Where is your IDE?

Try
C:\Program Files\Java\<YOUR IDE VERSION>\bin\Java -jar MyApp.jar

If B4J IDE is installed on the machine, the jar files works from any folder.

The problem is that the jar file doesn't work if the B4J IDE is not installed.

Swissmade · Nov 6, 2025

Then you miss some files.
What Java version you are using? JRE and not IDE Typo
Is it a GUI app or Command?

DonManfred · Nov 6, 2025

ranul said:
It's the same issue on a number of different machines.

Upload your project.
There must be something what you did wrong...

Alessandro71 · Nov 6, 2025

What if you build a standalone package?

ranul · Nov 11, 2025

DonManfred said:
Upload your project.
There must be something what you did wrong...

Beside the jar file, do I need to have other files/libraries on the Windows that I am trying to run the jar file?
In other words, does the jar file include everything that I need to run the application? (assuming JRE is installed)

Alessandro71 · Nov 11, 2025

Project / Build standalone package
and everything will be included

ranul · Nov 11, 2025

Alessandro71 said:
Project / Build standalone package
and everything will be included

Thanks.
The question is: Can I use only the exe file that was created or do I need to deploy the exe file together with the rest of stuff in the build folder which includes folders like bin, conf, legal, lib.

Sandman · Nov 11, 2025

ranul said:
The question is: Can I use only the exe file that was created or do I need to deploy the exe file together with the rest of stuff in the build folder which includes folders like bin, conf, legal, lib.

Alessandro71 said:
Project / Build standalone package
and everything will be included

Chris2 · Nov 11, 2025

ranul said:
Can I use only the exe file that was created or do I need to deploy the exe file together with the rest of stuff in the build folder which includes folders like bin, conf, legal, lib.

"You need to distribute the executable together with the 4 folders." - https://www.b4x.com/android/forum/t...distribute-standalone-ui-apps.117880/#content

josejad · Nov 11, 2025

ranul said:
Can I use only the exe file that was created or do I need to deploy the exe

As you can read in the link given by Chris2

"An Inno Script template is created in the parent folder. You can use it together with Inno Script to build a single file installer."

teddybear · Nov 11, 2025

Swissmade said:
Then you miss some files.
What Java version you are using? JRE and not IDE Typo
Is it a GUI app or Command?

You didn't answer Swissmade's question on the post#6

Swissmade · Nov 11, 2025

For Windows I use launch4j
Build the exe
Put it in a folder you like and also put the JRE there.
In launch4j you can tell where the runtimer is.

Post#6 is not answer so we don't know if it is a GUI application.

Swissmade · Nov 11, 2025

teddybear said:
You didn't answer Swissmade's question on the post#6

Thanks

ranul · Nov 11, 2025

The standalone package solved the issue. Thanks

Sandman · Nov 11, 2025

ranul said:
The standalone package solved the issue. Thanks

Just a friendly note. You're not meant to mark your own confirmation as the solution. In this case it would have more apropriate to mark #10 or #16 as the solution, or whichever you think is more correct.

B4J Question App works only if B4J IDE is installed on Windows

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