Monitoring open windows with java

Ok im trying to make a java program that detects mouse clicks, but only in a certain open window, i dont really know how to start this or how to obtain information about other applications running, but i have about 2 years experience with java and ive used the mouse events and key events but i dont really know much about windows. any help would be appreciated. -specifically im trying to make a program for a game that will reset a timer every time i click in the game window (a browser window) and the timer will show me how much time i have until i get logged out (im tired of waiting for someone else to make this so ive taken matters into my own hands to make my life just that much easier).

ok so im looking at the window focus listener and that could be promising though thats only useful if i made the window, any chance i could apply that to an already active window?

If you are talking about monitoring user interactions with a non-Java window, with a window that is in the OS and has been created by another program, I think that you may have chosen the wrong tool. Java is great for many things, but it's not so hot at interacting with the OS. You may be better off with C++ or if this is a Windows issue perhaps VB or C#. Your mileage may vary.

yeah ive come to that realization myself, and i guess ill start experimenting with c++