java -version java version "1.8.0" Java(TM) SE Runtime Environment (build 1.8.0-b132)...
Add Version (-v) command line option
java version "1.8.0" Java(TM) SE Runtime Environment (build 1.8.0-b132) Java HotSpot(TM)...
I'm running PortMapper-1.9.5 under Raspbian OS against a Cisco Valet M20 router....