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I noticed that the bash shell can suggest command line switches for your command.
Just type your command, a dash (-) and type tab. The shell will show you available switches.
For example, try:
andy@andyx:~$ java - and press tab – Surprise!
The question is:
How do I interface with this feature. I.e., if I write a program that is to be run from the console, what’s the API to tell the shell what switches are available?
You have discovered Bash’s programmable completion feature.