Ubuntu – Can’t install Oracle J2EE due to “An internal Error has occurred”

As Marcos Roriz and Thomas Ward said in the comments

That happens because eclipse writes a lot of temp and plugin files and /usr/local is recommended to not allow apps to write (that is only read and execute there)

You may have better luck just saving Eclipse down onto your user directory - it does still operate from the user directory, even though you may want to place it in /usr/ or elsewhere. This is what I do to use it :/

Start a search for all packages for the path /usr/share/java in the standard language (English):

LANG=C apt-file search  /usr/share/java/ | awk -F": " '{print $1}' | sort -u | xargs apt-cache policy | grep -P -B 1 "Installed:\s[^(]"

With this command, you see a list of installed packages. Install these packages again with:

sudo apt-get install --reinstall <package_name>

Sample output:

% LANG=C apt-file search  /usr/share/java/ | awk -F": " '{print $1}' | sort -u | xargs apt-cache policy | grep -P -B 1 "Installed:\s[^(]"

gettext:
  Installed: 0.19.2-2ubuntu1
--
gettext-base:
  Installed: 0.19.2-2ubuntu1
--
java-common:
  Installed: 0.52
--
libatk-wrapper-java:
  Installed: 0.30.5-1
--
libcommons-collections3-java:
  Installed: 3.2.1-8
--
libcommons-dbcp-java:
  Installed: 1.4-5ubuntu1
--
libcommons-pool-java:
  Installed: 1.6-2
--
libecj-java:
  Installed: 3.10.1-1
--
libservlet3.0-java:
  Installed: 7.0.56-2
--
libtomcat7-java:
  Installed: 7.0.56-2
--
ure:
  Installed: 4.4.2-0ubuntu1