Is it possible to create an instance of Process class if I have pid? Java

Question

Is it possible to create an instance of Process class if I have pid of process which already running? And put this Process in Map processMap. And then be able to stop Processes or check IsAlive

and do what with it? Are you simply looking to find if that process has completed, or are you trying to connect to its streams, or ... — Andy Turner, Feb 05 '20 at 08:51
@Andy and put this Process in Map processMap. And then be able to stop Processes or check IsAlive — SorryForAsking, Feb 05 '20 at 08:53

score 1 · Accepted Answer · answered Feb 05 '20 at 08:57

This isn't what Process is for:

Process provides control of native processes started by ProcessBuilder.start and Runtime.exec.

That's not to say you can't control already-running processes from Java; it's just that Process isn't the thing you should use to do it.

You can make your own class to do what you say you need, e.g:

interface ExternalProcess {
  boolean isRunning();

  void kill();
}

with implementations of the methods such as:

Is it possible to create an instance of Process class if I have pid? Java

1 Answers1