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JavaSysMon is designed to provide an OS-independent way to get live system information such as CPU and memory usage, distributed as a single jar file. It is written in C and Java. However the C is hidden away inside the jar (thanks to one-jar), so you never need to worry about it.

Currently it supports Mac OS X and Linux. Support for Windows will be added shortly; Solaris should follow a little later. Ultimately we aim to support everything from AIX to Android.

Get started

Run ant, and then:

java -jar target/javasysmon.jar

Using the library from code

Simply put the jar in your classpath, and use it like this:

import com.jezhumble.javasysmon.JavaSysMon;
JavaSysMon monitor = new JavaSysMon();
float cpuUsage = monitor.cpuUsage();
long totalMemory = monitor.totalMemory();
long freeMemory = monitor.freeMemory();
long totalSwap = monitor.totalSwap();
long freeSwap = monitor.freeSwap();
int numCpus = monitor.numCpus();
long cpuFrequency = monitor.cpuFrequency();

Current support

• Currently only supports Mac OS X and Linux
• Supports Java 1.4 and above

License

JavaSysMon is BSD licensed.