If you did not migrate your account yet, visit https://idp-portal-info.suse.com/
Eclipse is part of the official repositories:
sudo zypper install eclipse-jdt
for the Java version and
sudo zypper install eclipse-cdt
for C/C++ developers.
It is also available via Flatpak:
sudo zypper install flatpak
Install from the FlatHub repository:
flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
flatpak install flathub org.eclipse.Java
Run as a containerized application:
flatpak run org.eclipse.Java
If Eclipse doesn't start after an update try
which cleans all cached data.