Thanks for the suggestion, but I'm not being successful with apt-get either.
$ sudo apt-get install eclipse-platform
The following packages have unmet dependencies:
eclipse-platform: Depends: java-common (>= 0.23) but it is not installable
Depends: eclipse-rcp (= 3.2.2-3ubuntu3) but it is not going to be installed
Depends: libjsch-java (>= 0.1.28) but it is not installable
Depends: libtomcat5.5-java but it is not going to be installed
$ sudo apt-get install java-common eclipse-platform
Package java-common is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source