How to get percentage of CPU usage of OS from java

Question

I want to calculate percentage of CPU usage of OS from java code.

1. There are several ways to find it by unix command [e.g. using mpstat

Answer 1

You can use the SIGAR API. It is cross platform ( but I've only use it on Windows).

The Javadoc is available here and the binaries are here

It is licensed under the terms of the Apache 2.0 license.