How Can I Convert My Java JAR File to an Executable for Windows (and Mac/Linux)?

Converting Java JAR Files to Executables

Question:

Can a .jar file be converted to an .exe file to run on Microsoft Windows? Are there any tools available for this conversion, including options for Mac and Linux?

Answer:

Launch4j is a versatile tool that can be used on both Windows and Linux/Mac to convert JAR files to EXE format:

• Windows: Launch4j offers a straightforward graphical user interface (GUI) for creating EXE files from JARs.
• Linux/Mac: Although Launch4j doesn't natively run on Linux or Mac, users can embed their JAR into a shell script (exestub.sh) using the following steps:

<code class="sh">#!/bin/sh
MYSELF=`which "<pre class="brush:php;toolbar:false"><code class="sh">$ cat exestub.sh myrunnablejar.jar > myrunnable
$ chmod +x myrunnable</code>

" 2>/dev/null` [ $? -gt 0 -a -f "" ] && MYSELF="./" JAVA_OPT="" PROG_OPT="" # Parse options to determine which ones are for Java and which ones are for the Program while [ $# -gt 0 ] ; do case in -Xm*) JAVA_OPT="$JAVA_OPT " ;; -D*) JAVA_OPT="$JAVA_OPT " ;; *) PROG_OPT="$PROG_OPT " ;; esac shift done exec java $JAVA_OPT -jar $MYSELF $PROG_OPT

This shell script can then be converted into an executable file using:

This method works because JAR files have a ZIP format, with the header located at the end. By prefixing the JAR file with the shell script, the script acts as an executable header that launches the Java Virtual Machine (JVM) to run the JAR as an application.

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