如何从 a.jar 成功生成 working.exe，包括 jre 和必要的依赖项？

Question

0 What I have so far:

So I build an application with Java 17 using JavaFX for the UI Stuff. After sveral attempts I finally generated a.jar-File that runs the programm with the following command:

java --module-path ".\jre" --add-modules java.base --module-path
".\lib\lib" --add-modules javafx.controls,javafx.fxml,javafx.graphics
-jar .\bin\Memorygame.jar --main-class java/spotted/memorygame/MemoryGame.java

Regarding the structure:

 |
 |-bin
     |- Memory.jar
 |
 |-jre
     |-here lies the jdk it should use 
 |
 |-lib
     |-here are the files for JavaFX

I had serveral failed attempts to generate a working exe with an own runtime environment.

1 Attempt Launch4j

I somehow managed to pack the jre into the final exe but running that resulted in a

java.lang.noclassdeffounderror: javafx/application/application

So I tried to give the module info to where the JavaFX lies and what modules I want to use in the JVM Field in Launch4j. I still got the same Problem.

2 Attempt JPackage without a main-class

I read that jpackage works sometimes better than Launch4j, so i try it next. Building the exe (or msi I tried both with the same result) works completly fine.

jpackage  -t exe --name "Memorygame" --app-version 1.0.0 --input ".\bin" --dest ".\bin" 
--main-jar "Memorygame.jar" --module-path ".\jre" --add-modules java.se 
--module-path ".\lib\lib" --add-modules javafx.controls,javafx.graphics,javafx.fxml

I get an installer that works, when I now try and run the.exe that was installed I get a

Failed to load JVM and afterwards a Child process exited with code 1

I start my next and up to this point last one:

3 Attempt jpackage with main-class

I use the exact same comand as in the scend one but i add a main-class option:

jpackage  -t exe --name "Memorygame" --app-version 1.2.0 --input ".\bin" --dest ".\bin" 
--main-jar "Memorygame.jar" --module-path ".\jre" --add-modules java.se 
--module-path ".\lib\lib" --add-modules javafx.controls,javafx.graphics,javafx.fxml
 --main-class java/spotted/memorygame/MemoryGame.java

(I can actually leave out the java/ -part of the classpath, it still has the same resut.)

Installing and starting this, results only in the Child process exited with code 1

My Question now:

Does someone know, where the mistakes in my attempts lie and maybe has a way to solve them? Or a completly different way to approach the problem?

Answer 1

Just have a look here https://github.com/dlemmermann/JPackageScriptFX and compare your setup with this working one.