Linux 16.04 LTS ROS Kinetic

context

Put tangorosmessages from tangorosstreamer package into catkin_ws/src as instructed by teacher. This folder has its own package.xml and CMakeLists.txt so should be fine.

problem

Trying to use the tangorosmessages/save_map service:

$ rosservice list

returns available service:

/tango/save_map

But trying out the following:

$ rosservice info /tango/save_map

returns:

ERROR: Unable to load type [tangorosmessages/SaveMap]

Have you typed 'make' in [tangorosmessages] ?

Trying:

~catkinws/$ catkinmake

returns:

CMake Error at /usr/share/cmake-3.5/Modules/FindPackageHandleStandardArgs.cmake:148(message): Could Not find JNI (missing: JAVAAWTLIBRARY JAVAJVMLIBRARY JAVAINCLUDEPATH JAVAINCLUDEPATH2 JAVAAWTINCLUDE_PATH)

Trying:

~/catkingws/src/tangoros_messages$ make

returns:

make: *** No targets specified and no makefile found. Stop.

Search results

The answers I found at:

https://stackoverflow.com/questions/17636166/cmake-find-packagejni-not-work-in-ubuntu-12-04-amd64

https://github.com/zeromq/jzmq/issues/332

https://forum.byte-welt.net/t/could-not-find-jni-missing-java-awt-library-java-jvm-library/3570/5

However, these do not help me as I'm unable to understand their responses. Furhtermore, as someone put it in the last link:

" I did a websearch for “Could NOT find JNI” cmake FindPackageHandleStandardArgs and this (and similar searches) brings hundreds of results, but only some strange bug reports and build logs without any explaination or solution…"

What is the cause of this error / How do I resolve it or avoid it? Thank you.