Installing matlab 2012b on ubuntu 12.10-java error

Installing matlab 2012b on ubuntu 12.10-java error

I have matlab 2012b iso file and I tried mounting it and install ..but i get the following error...
    root@karthik:/home/karthik# mount -t iso9660 -o loop /home/karthik/Downloads/matlab.iso /media/mathworks
    mount: warning: /media/mathworks seems to be mounted read-only.
    root@karthik:/home/karthik# cd /media/mathworks
    root@karthik:/media/mathworks# ./install
    ---------------------------------------------------------------------------
    Error: Cannot locate Java Runtime Environment (JRE).
    The directory /media/mathworks/sys/java/jre/glnx86/jre does not exist.

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What could be the problem??