How to install Matlab on Ubuntu.(didn't get through)

Download Image
Mount Image:
sudo mkdir /opt/matlab
Copy licence file to it.
sudo mount -t iso9660 ISO_FILE_NAME /media/cdrom -o loop

Run Install:
sudo /media/cdrom/install -glnx86 -nocp
Setup:
sudo /opt/matlab/install_matlab
Install Java:
sudo apt-get install sun-java6-jre(not working...)