Launch4j 3.5

Cross-platform Java executable wrapper for creating lightweight Windows native EXEs
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Launch4j is a cross-platform tool for wrapping Java applications distributed as jars in lightweight Windows native executables.

The executable can be configured to search for a certain JRE version or use a bundled one, and it's possible to set runtime options, like the initial/max heap size.

The wrapper also provides better user experience through an application icon, a native pre-JRE splash screen, a custom process name, and a Java download page in case the appropriate JRE cannot be found.

NOTE: Launch4j is licensed and distributed under the terms of the BSD License.

Main features:

  • Launch4j wraps jars in Windows native executables and allows to run them like a regular Windows program. It's possible to wrap applications on Windows, Linux, Mac OS X and Solaris!
  • Also creates launchers for jars and class files without wrapping.
  • Supports executable jars and dynamic classpath resolution using environment variables and wildcards.
  • Doesn't extract the jar from the executable.
  • Custom application icon with multiple resolutions and color depths.
  • Native pre-JRE splash screen in BMP format shown until the Java application starts.
  • Process name as the executable filename to easily identify your application, initial priority and single aplication instance features.
  • Works with a bundled JRE or searches for newest Sun or IBM JRE / JDK in given version range.
  • Opens Java download page if an appropriate Java version cannot be found or a support website in case of an error.
  • Supports GUI and console apps.
  • Supports Vista manifests and XP visual style manifests.
  • Passes command line arguments, also supports constant arguments.
  • Allows to set the initial/max heap size also dynamically in percent of free memory.
  • JVM options: set system properties, tweak the garbage collection...
  • Runtime JVM options from an .l4j.ini file.
  • Runtime command line switches to change the compiled options.
  • Access to environment variables, the registry and executable file path through system properties.
  • Set environment variables.
  • Option to change current directory to the executable location.
  • The JRE's bin directory is appended to the Path environment variable.
  • Custom version information shown by Windows Explorer.
  • GUI and command line interface.
  • Build integration through an Ant task and a Maven Plugin.
  • Lightweight: 26 KB!
  • It's free and may be used for commercial purposes.
  • Includes a sample application and Ant script that automates the build process from Java sources to native executable.
  • The wrapped program works on all Windows platforms (98/Me/NT/2K/XP/Vista), Launch4j works on NT/2K/XP/Vista, Linux, Mac OS X (build on 10.4) and Sparc Solaris 8-10.

last updated on:
October 10th, 2014, 6:22 GMT
file size:
4.5 MB
license type:
developed by:
Grzegorz Kowal
operating system(s):
Mac OS X
binary format:
Universal Binary
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3 Screenshots
What's New in This Release:
  • Ticket #75 Fixed exit value of -1 results in launch4j error.
  • Ticket #133, #134 Fixed runtimeBits JRE option.
  • FR #28, #72 Ability to restart the application based on exit code (Pascal Gruen, GK).
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