Jeanne Boyarsky wrote:By open, I assume you mean a standalone application that is running.
I'm guessing (although we haven't been told anything) that these applications have already been written and don't include any code for transferring data between them. In which case you're probably limited to copy-and-paste via the clipboard. On the other hand my guess might be completely wrong.
However it would be more helpful if we had some idea of what this question is for. General knowledge? A specific problem? Otherwise we're limited to saying things like "Yeah, Java can transfer data".