1. Go to root folder and then open a terminal there . If not use Ctrl + L and search "/usr/share/applications"
2. Then go to path "/usr/share/applications"
root@roshans-HP-PrBook-G4:/usr/share/applications#
3. Then we have to give a name for icon name as we want ,
Here my icon name is "intelJIdea"
sudo touch intelJIdea.desktop
4. After that sudo vi intelJIdea.desktop .Then we have to add following code to that file
[Desktop Entry]
Name=IntelliJ IDEA
Comment=IntelliJ IDEA IDE
Exec=/home/roshans/Documents/Software/idea-IC-211.7628.21/bin/idea.sh
Icon=/home/roshans/Documents/Software/idea-IC-211.7628.21/bin/idea.png
Terminal=false
StartupNotify=true
Type=Application
Categories=Development;IDE;
5. Then save that file using :wq
6. Then you will be able to find icon for any application you wanted to run using icon in the your application list.