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Double-clickable JAR Files

If a JAR file has a main class specified in its manifest file, a user can launch it just by double clicking the JAR file. Double-clickable JAR files are run with Java 1.4.1. If you need to run a JAR file with Java 1.3.1, you can either wrap it as a Mac OS X application bundle using Jar Bundler or you can launch it from the command line with /System/Library/Frameworks/JavaVM.framework/Versions/1.3.1/Commands/java -jar YourJARFile.jar.

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