How can a Java program get its own process ID?

Question

How do I get the id of my Java process?

I know there are several platform-dependent hacks, but I would prefer a more generic solution.

Answer 1

Based on Ashwin Jayaprakash's answer (+1) about the Apache 2.0 licensed SIGAR, here is how I use it to get only the PID of the current process:

import org.hyperic.sigar.Sigar;

Sigar sigar = new Sigar();
long pid = sigar.getPid();
sigar.close();

Even though it does not work on all platforms, it does work on Linux, Windows, OS X and various Unix platforms as listed here.