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launch4j

Launch4J not picking up bundled JRE

i am aware that there are many similar questions like this one, but i could not make it work with those solutions.

I am using Launch4J 3.50, and trying to run a exe using a bundled JRE, which is provided by adoptium https://adoptium.net/temurin/releases/?version=11

By starting the exe from a bat file, using SET Launch4j=debug option, i am able to generate this log file:

Version:    3.50
CmdLine:    D:\MyApp.exe 
JNI:        No
WOW64:      Yes
Working dir:    D:\.
Requires JDK:   Yes
Requires 64-Bit: No
Java min ver:   1.011.000_000
Java max ver:   1.011.900_900
JRE paths:  service\adoptium
Check launcher: D:\service\adoptium\bin\javaw.exe (OK)
Check javac:    D:\service\adoptium\bin\javac.exe (not found)
64-bit search:  SOFTWARE\JavaSoft\Java Development Kit...
32-bit search:  SOFTWARE\JavaSoft\Java Development Kit...
64-bit search:  SOFTWARE\JavaSoft\JDK...
32-bit search:  SOFTWARE\JavaSoft\JDK...
64-bit search:  SOFTWARE\IBM\Java Development Kit...
32-bit search:  SOFTWARE\IBM\Java Development Kit...
64-bit search:  SOFTWARE\IBM\Java Development Kit...
32-bit search:  SOFTWARE\IBM\Java Development Kit...
Error msg:  This application requires a Java Runtime Environment 11.0.0 - 11.900.900

This is my root folder:

enter image description here

This is my service folder:

enter image description here

And this is my Launch4J xml configuration file:

<?xml version="1.0" encoding="UTF-8"?>
<launch4jConfig>
  <dontWrapJar>false</dontWrapJar>
  <headerType>gui</headerType>
  <jar>C:\Users\jhonnyD\Desktop\launch4j\service\jars\MyApp.jar</jar>
  <outfile>.\MyApp.exe</outfile>
  <errTitle></errTitle>
  <cmdLine></cmdLine>
  <chdir>.</chdir>
  <priority>normal</priority>
  <downloadUrl></downloadUrl>
  <supportUrl></supportUrl>
  <stayAlive>false</stayAlive>
  <restartOnCrash>false</restartOnCrash>
  <manifest></manifest>
  <icon>C:\Users\jhonnyD\Desktop\launch4j\myIcon.ico</icon>
  <classPath>
    <mainClass>com.main.StartMyApp</mainClass>
    <cp>C:\Users\jhonnyD\Desktop\launch4j\service\jars\lib\*</cp>
  </classPath>
  <jre>
    <path>service/adoptium</path>
    <requiresJdk>true</requiresJdk>
    <requires64Bit>false</requires64Bit>
    <minVersion>11.0.0</minVersion>
    <maxVersion>11.900.900</maxVersion>
  </jre>
</launch4jConfig>

When i run this on a computer that has java installed, the exe works. Clearly it is picking up the jre from the system. When i run this on a computer where java is missing, i am getting:

This application requires a Java Runtime Environment 11.0.0 - 11.900.900

The strange thing is that the log states that bundled javaw.exe is found:

Check launcher: D:\service\adoptium\bin\javaw.exe (OK)

Am i missing something here?

Solution

  • Seems like you need to change the option in tag <requiresJdk> from true to false. I've tested launch4j 3.50 just now on my app with similar config and it worked fine with this min config:

    <?xml version="1.0" encoding="UTF-8"?>
<launch4jConfig>
  <dontWrapJar>false</dontWrapJar>
  <headerType>gui</headerType>
  <jar>C:\launch4j-3.50-win32\service\jars\dvm.jar</jar>
  <outfile>C:\launch4j-3.50-win32\dvm.exe</outfile>
  <errTitle></errTitle>
  <cmdLine></cmdLine>
  <chdir>.</chdir>
  <priority>normal</priority>
  <downloadUrl></downloadUrl>
  <supportUrl></supportUrl>
  <stayAlive>false</stayAlive>
  <restartOnCrash>false</restartOnCrash>
  <manifest></manifest>
  <icon></icon>
  <jre>
    <path>service/adoptium</path>
    <requiresJdk>false</requiresJdk>
    <requires64Bit>false</requires64Bit>
    <minVersion></minVersion>
    <maxVersion></maxVersion>
  </jre>
</launch4jConfig>