[PLUG-TALK] SOLVED Java confusion

[John Jason Jordan]

I finally found a place that had a deprecated but still functional PPA
for the two Oracle packages. It worked, I installed them, and TreeForm
is now working.

In case anyone else needs these packages, here is the URL:
https://deb.pkgs.org/packages/opennms-amd64/oracle-java8-installer_8u131-1~webupd8~2_all.deb.html


On Thu, 17 Feb 2022 16:37:02 -0800
John Jason Jordan <johnxj at gmx.com> dijo:

>For many years I have had a Java application called TreeForm for
>drawing phrase structure trees. I have the current version installed
>on my Lenovo laptop, where it works perfectly. Now I am trying to get
>it working on my new Latitude, but it produces an error when I try to
>run it:
>
>	java -Xmx256m -Xms64m -jar TreeForm.jar
>	Exception in thread "main" java.lang.NoClassDefFoundError:
>		sun.misc.Launcher at user.Interface.Start.<clinit>
>		(Start.java:54
>
>From past experience this program is really touchy about what flavor of
>Java you try to feed it. I searched Synaptic on the Lenovo for 'java'
>and installed everything installed there onto the Latitude, but still
>get the error. However, I didn't install two packages:
>
>	oracle-java8-installer	Oracle Java8(TM) Development Kit
>	oracle-java8-set-default	Set Oracle Java8 as default
>	Java
>
>I remember having e-mail discussions (Donald Derrick, now PhD, UBC) who
>is the fellow who wrote it while working on his dissertation on syntax,
>and he strongly suggested Sun Java 8 (now Oracle) which is no doubt why
>I installed the above two packages. However, I installed them a long
>time ago and I don't know where I got them. They're not in the repos
>for Xubuntu 21.10, and I can't find any references to them as .deb or
>PPA anywhere on Oracle's website.  However, I did find and download
>from Oracle jdk-8u321-linux-x64.tar, which can be used to install
>Oracle Java 8 on 64-bit Linux. I extracted the contents of the file,
>but it doesn't seem to have occurred to Oracle to include instructions
>for how to install it.
>
>I found a lot of references on askUbuntu regarding a PPA, but the
>comments indicate that it was eliminated on 4/17/2019.
>
>I could use some suggestions. :)
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