To use Eclipse you'll need two folders. One where you install Eclipse, the other one will be the workspace. E.g., /home/acraphae~/devel/eclipse_installs/ and /home/acraphae~/devel/eclipse_workspaces/gramps

Download an Eclipse package from [http://www.eclipse.org/downloads/ Eclipse.org]. Unzip the file into /home/acraphae~/devel/eclipse_installs/ and run the eclipse binary in /home/acraphae~/devel/eclipse_installs/eclipse when asked for a workspace, enter /home/acraphae~/devel/eclipse_workspaces/gramps