The Guide shows you Step-by-Step How to Install and Getting-Started with the Latest Eclipse 2023-03 R IDE x8664 Standard IDE for Linux Lubuntu 13.04 Raring Ringtail Lxde amd64 Desktop.
There is the Possibility also to Install the Eclipse Platform via apt-get But the Lubuntu 13.04 Raring apt Repositories are still Back to Eclipse 3.8 Flavor.
So at the Moment if you want Install the Latest Release of Eclipse 2023-03 R Build on Linux Lubuntu 13.04 you will Need to Download and Install Eclipse 2023-03 R Release for Linux.
The Contents and Details are Essentials and Give Focus only to Instructions and Commands.

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Download Latest Eclipse Standard for Linux:
Eclipse 2023-03 R IDE Standard Linux -
Double-Clik on Archive and Extract Eclipse into /tmp
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Open Terminal Window
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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 from Terminal simply with:
eclipse
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Create an Eclipse Desktop Launcher for Easy-Starting:
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Install Recommended Oracle Java SE JDK.