How do I install javahl?

are you installing eclipse from ubuntu repository? or download from eclipse?

IMHO you need install eclipse manually.

first you install subversion :

sudo apt-get install subversion

if you want to install subversion plugin for eclipse, you can install using menu Help -> Install New Software choose Helios or Galileo :

choose Collaboration and select Subversive :

Subversive? Not a good option, the problem is that version 1.7 or later of JavaHL is required, and the user is correct that libsvn-java only includes 1.6.x. Ubuntu needs to update this library.

Install svn from WANdisco - worked for me. Small explanation with solution:

https://plus.google.com/110836571215849032642/posts/5gecVzxXUpz

Script to run (found in the post above too), which will install the subversive and libsvn-java 1.7

http://pastebin.com/H7YjU1c3

And (as specified in the question), add the following line in eclipse.ini

-Djava.library.path=/usr/lib/jni/