B4J Question B4J app from Windows to Linux

[Wien.Mart]

Hello All,

I have been trying to make an app with multiple forms (GUI) to work on Linux. I am using Rocky Linux (RL) since this is closest to CentOS 8 (I am a newbie to Linux and I have a lot of learning to do). I installed java 11 downloaded from B4X site as well as the B4J-bridge.jar and it seems to be working after a lot of tries. Finally, I see on the terminal that I am connected. I use a windows machine to connect to the bridge to RL. I got the message below on B4J IDE:

WARNING: package com.sun.glass.ui.win not in javafx.graphics

I did some more searching and added the line

#VirtualMachineArgs: --add-opens javafx.graphics/com.sun.glass.ui=ALL-UNNAMED

in the Region Project Attributes and run in release mode. I got another error

Unrecognized option: --add-opens javafx.graphics/com.sun.glass.ui=ALL-UNNAMED
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

May I ask, where am I going wrong or what do I need to add. I see in tutorials that members are able to run their creations in Mac, Raspberry Pi and Linux.

Thank you in advance.

Warm regards,

Martin

 

[Wien.Mart]

What is tested by me so far is on Ubuntu Linux 20.04 LTS.
I am not sure which version of Rocky Linux you are running. I would suggest you use the desktop environment (DE) which is running on X11 display server and see is the problem gone.
May I know any reason you picked up Rocky Linux?

@aeric
We are using RHEL in our production environment. CentOS 8 development has ended. Next best to CentOS 8 is Rocky Linux. I am a newbie to Linux and am discovering a lot of quirks and issues. I wanted to learn a linux flavor that is very near our production environment, learning a database engine in linux and learning B4J and B4A at the same time. Three birds ... one stone ... ? if that is possible.

 

[aeric]

@aeric
We are using RHEL in our production environment. CentOS 8 development has ended. Next best to CentOS 8 is Rocky Linux. I am a newbie to Linux and am discovering a lot of quirks and issues. I wanted to learn a linux flavor that is very near our production environment, learning a database engine in linux and learning B4J and B4A at the same time. Three birds ... one stone ... ? if that is possible.

Take your time. I suggest you use B4J to learn B4X. You can do a quick test using Console (Non-UI) app without firing up an emulator or connect to a real Android device.

I think Rocky Linux and AlmaLinux are quite new. Maybe you may try Fedora or OpenSUSE which also based from Red Hat.

 

[Wien.Mart]

@aeric .... thank you. I shall try different distros of linux to see what works best for my use.

Thanks too Erel, tchart and xulihang.

 

[aeric]

@aeric .... thank you. I shall try different distros of linux to see what works best for my use.

Thanks too Erel, tchart and xulihang.

Check https://distrowatch.com for the ranking of popular Linux distros.

 

[Wien.Mart]

this is a great resource ... thanks ...

 

[rboeck]

this is a great resource ... thanks ...

I read this and your problem came to my mind:

Lockruf für verprellte CentOS-Nutzer: Was steckt hinter SUSEs freiem RHEL-Klon?

Mit Liberty Linux will SUSE bisherige CentOS-Nutzer als Kunden gewinnen. Martin Loschwitz erklärt, worauf sich wechselwillige Nutzer einstellen müssen.

www.heise.de

Maybe the quickest solutiuon...
Greetings from LA (lower austria ;-)
Reinhard

 

[Wien.Mart]

@Reinhard

Thank you for the informative link above ... I shall proceed to download, install and test.

Thanks,

Martin


ps ... Auslander who used to be from Vienna, still work in Vienna, now live in LA too ... hi neighbor. =)