Check What You Run

I usually try to check what software is installed and I'm running on my machine, using debian there are a few ways to check this with a few packages that come from the repository, I use

Java Shell Script

Often happen that I've to write some shell/automation scripts for job or fun and most of the time i do it with bash or similar, but because my main programming language has been java, i every time wondered if could be possible do some of this script in java, i know that a lot of other languages have the support for be ran as script, like in D you can put on the top of your file #!/usr/bin/env rdmd and that file can be compiled or just run, in case you run it it will compile itself and exec the code.....