On CentOS and Debian systems "make install" copies JAR file twice instead of just once with a symbolic link.  See below:

conrad@debdev:~/gnu/svn/trunk/inetlib$ ls -l /usr/local/share/java
total 472
-rw-r--r-- 1 root staff  47042 Jan 21 14:35 activation.jar
-rw-r--r-- 1 root staff 210811 Jan 21 14:45 inetlib-1.2.jar
-rw-r--r-- 1 root staff 210811 Jan 21 14:45 inetlib.jar
conrad@debdev:~/gnu/svn/trunk/inetlib$

I suggest /usr/local/share/java should mimic the build directory:

conrad@debdev:~/gnu/svn/trunk/inetlib$ ls -l *.jar
-rw-rw-r-- 1 conrad conrad 210869 Jan 27 01:26 inetlib-1.2.jar
lrwxrwxrwx 1 conrad conrad     15 Jan 27 01:26 inetlib.jar -> inetlib-1.2.jar
conrad@debdev:~/gnu/svn/trunk/inetlib$