How to interect between two JVM instances?

[Girish Vasmatkar]

Hello to all ranchers,

My desktop application is a JFrame and I want only one instance of my application to run at a time and so far i have been successful.

I used file locking mechanism to check if the lock on the file exists and it it does exists then I am stopping another instance of JFrame to load.

But when I minimize the first instance i want that first instance of JFrame to be maximized or you can say setVisible(true).

Does any one have any idea how can i do this?

Thanks

[Peter Lawrey]

Instead of using a lock you could have them communicate using Sockets.
You can start the first one as a Server on a fixed port, and a second will not be able to start on that port until the first one dies. You can have these processes communicate via this port as well.