I can confirm that downloading the Eclipse installer from the main website: http://www.eclipse.org/downloads/ executing it as myself and then selecting the C/C++ option got me a working copy of Eclipse installed. That is a successful work around until the packaged version is fixed.
When I ran the install I did see some errors that I will bring up with the Eclipse team, if I can work out how: :~/Downloads/eclipse/eclipse-inst-linux64/eclipse-installer$ sudo ./eclipse-inst [sudo] password for thomas: WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by org.eclipse.emf.ecore.xmi.impl.XMLHandler (file:/home/thomas/Downloads/eclipse/eclipse-inst-linux64/eclipse-installer/plugins/org.eclipse.emf.ecore.xmi_2.13.0.v20170609-0707.jar) to method com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser$LocatorProxy.getEncoding() WARNING: Please consider reporting this to the maintainers of org.eclipse.emf.ecore.xmi.impl.XMLHandler WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release (SWT:17278): IBUS-WARNING **: 14:26:33.796: The owner of /home/thomas/.config/ibus/bus is not root! (SWT:17278): GLib-CRITICAL **: 14:26:38.153: Source ID 409 was not found when attempting to remove it :~/Downloads/eclipse/eclipse-inst-linux64/eclipse-installer$ ./eclipse-inst WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by org.eclipse.emf.ecore.xmi.impl.XMLHandler (file:/home/thomas/Downloads/eclipse/eclipse-inst-linux64/eclipse-installer/plugins/org.eclipse.emf.ecore.xmi_2.13.0.v20170609-0707.jar) to method com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser$LocatorProxy.getEncoding() WARNING: Please consider reporting this to the maintainers of org.eclipse.emf.ecore.xmi.impl.XMLHandler WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release (SWT:17498): GLib-CRITICAL **: 14:27:23.976: Source ID 5293 was not found when attempting to remove it (SWT:17498): GLib-CRITICAL **: 14:27:24.432: Source ID 5445 was not found when attempting to remove it (SWT:17498): GLib-CRITICAL **: 14:27:25.951: Source ID 5614 was not found when attempting to remove it [Fatal Error] :539:7: XML document structures must start and end within the same entity. However despite the above it did seem to install fine. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1784358 Title: Eclipse not starting with org.eclipse.equinox.launcher.Main.main java.lang.ClassNotFoundException being issued after updgrade to 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/eclipse/+bug/1784358/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
