Sending keystrokes with keys held down

Question

Hello,
I am trying to develop a program which will allow me to send keystrokes to another application (possibly not Java) based on a programmatically produced script. Similar to a macro program.
Ideally, I would like to be able to send keystroke combinations including periods where 1 or more keys are held down (other than normal control keys such as SHIFT and ALT). For example, I would like to be able to send keystrokes to another program to mimic this script:
KEY "a": hold down for 10 seconds, do nothing for 5 seconds, tap once.
KEY "b": do nothing for 12 seconds, tap, wait one second, tap, tap.
KEY "c": hold down for 5 seconds, pause 10, hold down for 5 seconds
Key "d": pause 5 seconds, hold down for 10 seconds, pause for 5
etc
...where each key's script is run simultaneously, ie, the 3rd second of the script will see key "a" being held down, and key "c" held down. The 12th second will see the "b" key tapped once while the "d" key was held down.
My intention is to use such a program to drive others which use the keyboard for input, but not as typed keys, but rather as buttons.
Does anyone have any ideas on how this could be done?

Answer 1

I'm not sure, but could the Robot class work for you?
http://java.sun.com/j2se/1.5.0/docs/api/java/awt/Robot.html