On Wed, Oct 17, 2018 at 09:28:55PM -0500, Kent West wrote:
>    westk@westkent64:~$
>    i A eclipse-jdt - Eclipse Java Development Tools (JDT)
>    i A eclipse-pde - Eclipse Plug-in Development Environment (PDE)
>    i A eclipse-platform - Eclipse platform without development plug-ins
>    i A eclipse-platform-data - Eclipse platform without development plug-ins
>    (data)
(SNIP)
>    westk@westkent64:~$ java --version
>    openjdk 11 2018-09-25
>    OpenJDK Runtime Environment (build 11+28-Debian-3)
>    OpenJDK 64-Bit Server VM (build 11+28-Debian-3, mixed mode, sharing)
>    Any help would be appreciated.
Kent,
The Eclipse JDT package in Sid (version 3.8) came out nearly 6.5 years
ago!  I doubt it if it will work with Java 11 and I would even be
surprised if it worked with Java 8.
Sadly, Eclipse is one piece of software that I have just never been able
to find a satisfactory setup based on Debian packages.  I recommend you
download the binary tarball from upstream, untar it in /opt and work
with it from there.
Regards,
-Roberto
-- 
Roberto C. Sánchez
Thanks for your response, Roberto. That helps. I purged all I could find of Eclipse, and then downloaded their installer from the 
eclipse.org website, and then their "Eclipse IDE for Java Developers", and with a little trial-and-error (their tutorial was a bit unclear), got a working "Hello, World" program.
It's a start.
I do feel a little tainted, going outside of the Debian repositories for software. But I understand that in the world of Free Software, there's not always a volunteer available to maintain a package.
This moves me forward. Thanks!