B4J Question How to run B4J .jar application on linux

[vecino]

Hello, I can run the applications created with B4J using the command:
java -jar something.jar
In linux, too.
But, if it has been created with B4J it cannot be run. It always shows the error that it needs javafx runtime.
What do I have to do to run in linux the applications created with B4J?
Thank you.

 

[MichalK73]

Problems:
1. You have a GUI application and you want to run it in linux console mode.
2. Wrong java version on linux

 

[vecino]

1. You have a GUI application and you want to run it in linux console mode.

That's the problem.
I want to run it normally in the GUI.

 

[MichalK73]

You must run from the linux desktop environment and not from the console.

 

[vecino]

Thanks, folks.
I've created a menu entry to run it and it doesn't work either.
I don't know if the reason is because it's openjdk-11

 

[Erel]

JavaFX is distributed differently in Java 11+.

Two options:
1. Switch to Java 8.
2. Build a package with B4JPackager 11.

 

[vecino]

Nothing, I can't get it to work.
I'll try installing java 8 :/

 

[vecino]

Are executables (.jar) created with B4J compatible with windows and linux?
Is there anything to consider when compiling?

 

[Erel]

Nothing, I can't get it to work.

We cannot help you with this information. Have you used B4JPackager 11?

 

[vecino]

Hi, sorry for my lack of information, but I just don't know what to say. If I run it from the graphical environment (gnome) it doesn't do anything, and if I run it from the terminal, it shows the error that javafx is missing.

As for B4JPackager, it's that the instructions and files are not at all similar to the ones in the post and the downloaded zip file, so I don't know how it works.
In short, what I want is to run in linux the .jar application created with B4J. (If it's possible).

 

[Peter Simpson]

@vecino

1. sudo apt-get install oracle-java8-jdk
2. java -jar somejavafile.jar

 

[vecino]

Hello, I have installed different "java" and with all of them I get the same result.
That's why I asked before if it's necessary to take something into account when compiling from B4J to run later in linux graphical environment.

 

[vecino]

Well, I've uninstalled everything related to java.
I installed openjdk11, and it doesn't work.
I installed oraclejdk8, it does work.
Can it only work with oraclejdk8, and no other?
Thanks to all of you.

 

[vecino]

@vecino

1. sudo apt-get install oracle-java8-jdk
2. java -jar somejavafile.jar

What repository do you use?
webupt8 no longer has oracle-java-8

 

[OliverA]

Technically, if all you are doing is running your JavaFX application, then you just need the JRE, not the complete JDK. With Java 8, the JavaFX is bundled. With Java 11, JavaFX is a separate entity and has to be installed on it's own. The B4J page on Anywhere Software's website offers a bundled download of JDK11+JavaFX. Under 8, a simple java -jar application.jar would launch an Java application. With 11, if you want to use the command line (and not the packager), you'll have to add some more parameters. For example, on Windows, I have the above mentioned Java 11 bundle installed in C:\OpenJDK. In order to launch a JavaFX application I would need to run

C:\OpenJDK\jdk-11.0.1\bin\java.exe --module-path C:\OpenJDK\jdk-11.0.1\javafx\lib --add-modules ALL-MODULE-PATH -jar application.jar

 

[OliverA]

What repository do you use?

Just use openjdk-8-jre or openjdk-8-jdk and also install openjfx

 

[vecino]

I have jdk and javafx 11 installed, but it doesn't work.
The only thing that's worked so far is oracle 8, I don't know why.

 

[OliverA]

I have jdk and javafx 11 installed

And how do you start your jar with Java 12? If you just do java -jar app.jar, it’s not going to work. See my post above

 

[vecino]

And how do you start your jar with Java 12? If you just do java -jar app.jar, it’s not going to work. See my post above

You mean this?

C:\OpenJDK\jdk-11.0.1\bin\java.exe --module-path C:\OpenJDK\jdk-11.0.1\javafx\lib --add-modules ALL-MODULE-PATH -jar application.jar

 

[OliverA]

Yes. Just use your file paths, not mine. Oh yea, Java 12 is a typo. I’m all thumbs on phones