When multiple java programs run on the same machine

Question

Each java application will run in a specific Java Virtual Machine Instance. I am really getting confused on below aspects and Googling has confused me even more. Different

Answer 1

1. see How to Daemonize a Java Program?
2. new instance of JVM will be created
3. the same way as memory is shared between all other processes
4. it is managed by O/S
5. other instances are not affected

If your instances have to coordinate their work, you can create single main instance which would run/stop other instances.

You did not explain why you need multiple JVM instances. Probably, single instance would work better.