Link to Eclipse download :
http://www.eclipse.org/downloads/index.php
Getting Started documentation:
http://www.eclipse.org/downloads/index.php
To create the eclipse projects to use for SCA development:
1) When checking code out from subversion, checkout the
subversion trunk to a location outside your eclipse
workspace (it has to be outside because Eclipse will
not allow you to import projects from a location
overlapping with your workspace)
2) Go to Import / Existing projects into workspace.
Select either the runtime, spec, tools or samples
directory.
The wizard proposes the list of Eclipse projects
under that directory. Importing the projects does
not copy the files; it just makes the files at that
location visible under an Eclipse project.
3) If you need to use Eclipse to edit files outside of
these projects (for example the etc directory, or
the maven files at the root of the trunk), then
delete the Eclipse projects, with the option to not
delete the files, and import the whole trunk as a
project.