How Can I Bundle a JRE with My Application Using Launch4j?

Bundling a JRE with Launch4j: A Comprehensive Guide

Enhancing application portability by bundling a JRE within the executable file is a key feature of Launch4j. To achieve this, follow these steps:

Acquiring a Portable JRE:

Oracle's JRE download links provide installer packages. To obtain a compact, portable JRE, navigate to other sources such as third-party websites or online repositories.

Integrating JRE with the EXE:

To bundle the JRE with the EXE using Launch4j, adopt the following structure within a zip file:

containerFolder
|- jre
      |-bin (java.exe resides within)
      |-lib
|- cfg (optional configuration folder)
|- bin (application with .exe, .jar, and dependencies)

Launch4j XML Configuration:

Within the Launch4j XML file, specify the JRE path relative to the EXE's location:

<jre>
    <path>../jre</path>
    <opt>-DgvSIG.confDir=../cfg</opt>
</jre>

Path Considerations:

Note that the "path" attribute does not point directly to "java.exe." Instead, it refers to the folder that contains it, ensuring proper JRE integration.

Custom JRE:

For bundling, you can use a JRE extracted from a Windows system installation. Simply copy and paste the necessary files into the "jre" folder.

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