B4J Question Modules file

Pelky · Dec 30, 2021

Hello oh fonts of knowledge, I have a problem that i need some help understanding.
When building a standalone application I find in the Build/Lib folder a file called Modules. This file is 46mb in size
and I was wondering if there was a way to reduce the size. I need to be able to email the application and it exceeds
the 30mb limit that outlook has. I have tried to reduce the libraries etc but this does not seem to make a difference.

Thank you in advance for your assistance.

MegatenFreak · Dec 30, 2021

Does it by any chance include Java runtime embedded inside?

Pelky · Dec 30, 2021

I am not entirely sure what you mean by that however I did some testsm with smaller apps and found that the size does change quite significantly depending on the designer definitions. I am sure there are other influencing issues tho.

What I am after is the smallest footprint when distributed. If you have any advice to give regarding that it would be appreciated.

DonManfred · Dec 31, 2021

Do not use the packager; distribute the JAR alone. This is the smallest footprint.

Java must be installed on the target system though.

Erel · Jan 2, 2022

Are you including any large assets files? They go into the modules file.

Why not send a link instead of sending the file? It will work better.

Pelky · Jan 4, 2022

DonManfred said:
Do not use the packager; distribute the JAR alone. This is the smallest footprint.

Java must be installed on the target system though.

I would like to thank you for your response and apologise for not coming back to you sooner - i have been working ridiculous hours.
I am not sure what you mean by the JAR alone. I have tried finding one but only
find the following files; JavaFx-Swt.Jar / JRT-Fs.Jar / Jar.Jar

Is one of these the Jar file you are referring to?

Erel · Jan 4, 2022

Pelky said:
Is one of these the Jar file you are referring to?

No. Run the app in Release mode and it will create a jar file that you can distribute with two important nuances:

1. You need to compile with Java 8 (11+ will not work).
2. Java 8 needs to be installed on the user computer.

Pelky · Jan 5, 2022

Thank you so much Erel your assistance it is very much appreciated.

To compile with Java 8 do I need to download that version and change my build parameters?
Also the computer I will be loading onto is windows 7 - does that make a difference?

Erel · Jan 6, 2022

Pelky said:
o compile with Java 8 do I need to download that version and change my build parameters?

Yes.

Pelky said:
Also the computer I will be loading onto is windows 7 - does that make a difference?

No.

Pelky · Jan 6, 2022

Erel said:
Yes.

No.

Thank you very very much - your assistance is always so welcome

Pelky · Jan 6, 2022

Erel said:
Yes.

No.

Once Again Thankyou - I have tried to create a release of the App using Java 8 and it had an error -

java 11+ is required

is there a way around this?

Erel · Jan 6, 2022

I guess that you tried to build a standalone package. This is only supported by Java 11+.

See my answer in post #7.

Pelky · Jan 6, 2022

Erel said:
I guess that you tried to build a standalone package. This is only supported by Java 11+.

See my answer in post #7.

I did indeed do that - I have now followed your instructions in #7 and it created a JAR file.

I double click on that and nothing happens. So I created a .bat file and got this message -

C:\DevX\Legals\LegalVisits\B4J\Objects>java -jar LegalVisits.jar
Error: JavaFX runtime components are missing, and are required to run this application

[process exited with code 1]

once again it would appear that I am missing something or the jar n3eds to be moved somewhere?

LucaMs · Jan 6, 2022

Pelky said:
I did indeed do that - I have now followed your instructions in #7 and it created a JAR file.

I double click on that and nothing happens. So I created a .bat file and got this message -

C:\DevX\Legals\LegalVisits\B4J\Objects>java -jar LegalVisits.jar
Error: JavaFX runtime components are missing, and are required to run this application

[process exited with code 1]

once again it would appear that I am missing something or the jar n3eds to be moved somewhere?

Check if you have javafx folder inside your jdk-11.x.x folder.

Pelky · Jan 6, 2022

LucaMs said:
Check if you have javafx folder inside your jdk-11.x.x folder.

I do have a javafx folder in the jdk-11.0.1 folder... however there is no such folder in the java8 folder

stevel05 · Jan 6, 2022

If you've set java8 in configure paths, make sure you don't have a #JavaCompilerPath directive pointing to java11 in your project

Pelky · Jan 6, 2022

stevel05 said:
If you've set java8 in configure paths, make sure you don't have a #JavaCompilerPath directive pointing to java11 in your project

where would I find that directive?

stevel05 · Jan 6, 2022

Probably near the top of Main module, do a search for #javacomp. It'll find it if it's there.

Pelky · Jan 6, 2022

stevel05 said:
Probably near the top of Main module, do a search for #javacomp. It'll find it if it's there.

I searched and found nothing ....

#Region Shared Files
#CustomBuildAction: folders ready, %WINDIR%\System32\Robocopy.exe,"..\..\Shared Files" "..\Files"

'Ctrl + click to sync files: ide://run?file=%WINDIR%\System32\Robocopy.exe&args=..\..\Shared+Files&args=..\Files&FilesSync=True
#End Region

I

stevel05 · Jan 6, 2022

It was just a thought. Javafx was included with the java 8 jdk, so if you've downloaded the jdk from the B4j download page you shouldn't get this issue.

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