Suppose I run two java programs simultaneously on the same machine. Will the programs run in a single instance of JVM or will they run in two different instances of JVM?
There's one JVM per Java application. There shouldn't be any connection between them unless you establish one, e.g. with networking. If you're working inside of an IDE, the code you write generally runs in a separate JVM. The IDE will typically connect the separate JVM for debugging.
Yes, you can run multiple JVM's on a single machine.
If you start each one with the java
command (from the command line) they will run as totally separate JVMs.
"Programs" may be started as separate Threads running inside the one JVM.
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