Comment 39 for bug 1363785

If you absolutely must use 14.10...

(1)
You can follow the instructions in post #14 (https://bugs.launchpad.net/ubuntu/+source/icedtea-web/+bug/1363785/comments/14) to correct the issue.

(2)
Or, execute these commands in sequence to avoid getting an error during the icedtea-7-plugin installation:

    # Remove icedtea-7-plugin openjdk-7-jre, if you have them installed
    $ sudo apt-get autoremove --purge icedtea-7-plugin openjdk-7-jre

    # Install openjdk-7-jre
    $ sudo apt-get install openjdk-7-jre

    # Use the workaround proposed in post #14: create a link to java-7-openjdk-amd64
    $ sudo ln -sv /usr/lib/jvm/java-7-openjdk-amd64 /usr/lib/jvm/java-8-openjdk-amd64

    # Install the iced tea plugin
    $ sudo apt-get install icedtea-7-plugin

Of course this is just a work-around.

Perhaps when openjdk 8 is released and, this bug may just go away???