Java launcher

Helper script to treat Java programs as scripts.

Overview

Put the java_launcher script in your path and put the following line at the top of an executable Java source program:

#!/usr/bin/env java_launcher

If you use Vim, add the following line:

# vim:ft=java

Optionally add jars to compile and run with:

# lib:/home/lk/kiln/teamten/java/dist/teamten.jar

Relative pathnames are relative to your Java script. In addition, all jars in a java_lib directory below the java_launcher script will be included.

The source will be compiled, cached, and executed. The source file does not need a .java extension, but it does need to match the name of the class.

Example

Put this into a file called helloworld and make the file executable. The name of the file must match the name of the class.

#!/usr/bin/env java_launcher
# vim:ft=java

public class helloworld {
    public static void main(String[] args) {
        System.out.println("Hello world!");
    }
}

Then run:

% ./helloworld
Hello world!