carlo@carlo-Ubuntu:~/Pobrane$ javaws
Program javaws it's not installed. etc.
sudo apt install icedtea-netx
carlo@carlo-Ubuntu:~/Pobrane$ sudo apt install icedtea-netx
Reading packet list... Ready... etc.
icedtea-netx is already the newest version (1.6.2-3ubuntu1).

carlo@carlo-Ubuntu:~/Pobrane$ javaws
Program javaws it's not installed. etc.