B4J Question Enable to run b4J program

DonManfred

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• Feb 13, 2019

• #2

to run the jar standalone it should NOT compile in Debug but in Release.
Debug will only work if the app is started by the IDE.

 

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lucdrb

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• Feb 13, 2019

• #3

I only said that everything is ok in debug mode and when I execute in release mode the program start well after the complilation.

When I close B4J and try to run the program with a double clic on the jar file (find in the program_name/object), nothing happend.

 

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DonManfred

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• Feb 13, 2019

• #4

Is it a UI app or nonUI App?

 

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lucdrb

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• Feb 13, 2019

• #5

It's a UI app
If it's can help I try to run it on a Mac and I got the same thing

 

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OliverA

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• Feb 13, 2019

• #6

Which JDK?

 

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aaronk

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• Feb 14, 2019

• #7

run the jar file from a batch file and see what it logs.

 

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metheoneandonly

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• Feb 14, 2019

• #8

Hello, same here, exactly the same problem. It says "Exception in thread "JavaFX Application Thread" Exception in thread "main" java.lang.UnsupportedClassVersionError: b4j/example/main has been compiled by a more recent version of the Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0". JDK is OpenJDK 11 + OpenJFX 11 as said on the B4J Download page, JRE is most recent.

 

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Daestrum

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• Feb 14, 2019

• #9

There is no JRE for java 11, the app has to run against the JDK java.exe.

If you run Java -version in a command prompt window, what does it return.

 

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Erel

B4X founder

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• Feb 14, 2019

• #10

@lucdrb which version of Java are you using?

Java 11 no longer supports executable jars. You need to use B4JPackager11 to build an installer: https://www.b4x.com/android/forum/t...the-simplest-way-to-distribute-ui-apps.99835/

 

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lucdrb

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• Feb 14, 2019

• #11

Here the result of java _version:
java version "1.8.0_201"
Java(TM) SE Runtime Environment (build 1.8.0_201-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.201-b09, mixed mode)

and I'm using the JDK 11.0.1

I'll try the B4Jpackager11 and I got 2 errors, I'll open a new thread for it
Thanks
Luc

 

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