Bundling a JRE with Launch4j
Launch4j offers a convenient feature for bundling a JRE within an executable file, but the documentation on this process is limited.
How to Bundle a JRE with Launch4j
- Acquire a Compact JRE: Obtain a portable JRE for execution. Oracle's download links primarily offer installer packages, requiring an alternative approach.
-
Package as a Zip Archive: Create a zip file containing the following directory structure:
-
containerFolder
- jre (Contains the copied JRE files: bin with java.exe, lib)
- cfg (Optional for user configuration)
- bin (Application files, including executable and JAR)
-
-
Configure Launch4j XML: Specify the JRE's path in the Launch4j XML file:
<jre> <path>../jre</path> <opt>-DgvSIG.confDir=../cfg</opt> </jre>
Key Considerations:
- The path in the XML points to the JRE folder, not the java.exe file. It should be one level above java.exe in the directory structure.
- Utilize a pre-installed JRE from a Windows system to extract the necessary JRE files for bundling.
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