First ever post..how does java interface an appl

Here is my problem...
I am trying to write a Java application that will allow me to track mouse movements, clicks, obtain urls, and other browser tracking data. I have searched forums enlessly and cant find the answer to my question. This is my first ever post dont let me down : )
1. How do I get a java application to retrieve, get or load an interface to ie or netscape that I can use their functions and retrieve information.
I need this for a school project and although there other ways maybe more suited, applet, script or whatever, this is my task. I have searched and cant find what the mechanics are for how java is to interface and use an application.
thanks...

I was excited to get a reponse...
I understand an applet runs in a browser and application runs independently. But say I want my java application program to interact with an application such as a browser. I want to grab data from it, such as mouse clicks and urls.
What I havent seen is how to do this. I am told that in C programing a dll would be loaded and imported functions could be called from within the C program, is there anything like this in java. How do I use an the ie or navigator API with Java?
thanks...

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