2 separate programs share one int variable

Question

Let's say I compile and execute a java program that returns an integer. It is just saved temporarily in an int variable and the code cannot be changed. After that, I want to compile and execute a second program that fetches the integer that had been returned in the previous program. I cannot save the integer in a text file for later use. Is there any possibility to do that? How would such a second program look like?

Answer 1

I took that as emphasising that the second program
couldn't have any kind of dependency upon its earlier
invocation (for example, it couldn't set up a named
pipe, or start a thread, or something).
Dave.Ok, that makes sense. But it still doesn't explain:
I cannot save the integer in a text file for later use. Does that mean that he doesn't control the first application, or is it because it's a distributed system? He says that he isn't allowed to recompile the first application, so he actually wants to attach to that proccess and read the value? I.e. write an proccess that uses the debugging api?
/Confused