This is a Java interface to Tobi Oetikers rrdtool. It is pure java but it requires the rrdtool binary to do its job.
'net.stamfest:java-rrd:1.1.0'
<dependency>
<groupId>net.stamfest</groupId>
<artifactId>java-rrd</artifactId>
<version>1.1.0</version>
</dependency>
<dependency org="net.stamfest" name="java-rrd" rev="1.1.0"/>
"net.stamfest", "java-rrd", "1.1.0"