Learning Java proxies - landscape question

Hi guys,

I could use a little help to learn Java Proxies, I'm just starting to get familiar with Java, I'm coming from the ABAP side.

First and foremost what do I need from the system point view?

We have an XI box and using file/FTP/IDoc adapters and also ABAP Proxies, I wrote some Java (mapping)functions, I am familiar with these.

But for a Java proxy, I would need a separate Java server(?) to run the application on, is this correct?

Can I use my own PC for this? (for learning purposes), I have NWDS installed on my PC.

What are the steps to write a small simple Java Proxy.

I would very much appreciate some help, guys, how do I start?

Thanks a lot,

Viktor