dpkg: error processing netbeans5.5 (--remove) missing final newline on a package

Thanks for this question.

Try to execute the following command:

sudo dpkg --remove --force-all netbeans5.5

I hope this helps

- Open a Terminal from the menu Applications->Accessories->Terminal

Useful Tip: to have the terminal window always on top please right click on the terminal window top title and select "Always on Top"

then type or better copy from here and paste into terminal the rows below:
copy and paste only one row a time then press enter.

sudo dpkg --clear-avail

(the system ask you a password: give your user password, you will not see nothing when you type it, then press enter)

sudo dpkg --configure -a
sudo aptitude install -f
sudo aptitude update
sudo aptitude upgrade
sudo apt-get autoremove

then if you want to reboot your system, type:

sudo reboot

Hope this helps