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

Answer 1

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:

• Verify if a process is running using its PID in JAVA
• Killing a process in Java