That looks like a pretty reasonable good library with tools to generate
the MIBs when required. What you should know first, is general
litreature of snmp.

Then you need your MIB extensions (if any) and your messages to play
with the stack. take the SmtpRequest console for start  before
integrating code into your programs. specially you need to know
what you want to do with what device, and to what extend.

Take the source of the SnmpRequest class for granted when generating
the messages for different pdutypes.

Look at the javadoc of the snmp  class to start your final integration. I
currently can not run a test against something as i don't have the
environment to test.