The Tututorial Show How to Install and Getting-Started with the Latest Eclipse 2022-12 R IDE x8664 Java JEE on Xubuntu Linux 12.04 Precise 64-bit Xfce Desktop.
There is the Possibility also to Install the Eclipse Platform via apt-get But the Ubuntu 12 Precise apt Repositories from Wich Xubuntu 12 Depends are still Back to Eclipse 3.7 Indigo.
So at the Moment if you want Install the Latest Eclipse 2022-12 R Build on Linux Xubuntu 12 you will Need to Download and Install Eclipse 2022-12 R JEE Release for Linux.
The contents give Focus only to the Essential Instructions and Commands so to make the Tut easier to understand ;)

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Download Latest Eclipse 2022-12 R x8664:
Eclipse 2022-12 R IDE x8664 Linux -
Double-Clik on Archive and Extract Eclipse into /tmp
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Open Terminal Window
(Press “Enter” to Execute Commands) -
Relocating Eclipse.
sudo chown -R root:root /tmp/eclipse && mv /tmp/eclipse /opt/
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Starting Eclipse from Terminal.
Making a Symlink
ln -s /opt/eclipse/eclipse /usr/local/bin/eclipse
After you can Start Eclipse JEE from Terminal simply with:
eclipse
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Create an Eclipse Desktop Launcher for Easy-Starting: