right click to open file with netbeans ubuntu

create file netbeans.desktop and save in /home/chieu/.local/share/applications
[Desktop Entry]
Encoding=UTF-8
Name=Netbeans IDE
Comment=Netbeans IDE
Exec=/home/chieu/netbeans-7.2/bin/netbeans %f
Terminal=false
Type=Application
Icon=/home/chieu/netbeans-7.2/nb/netbeans.png
Categories=Application;Utility;TextEditor;
StartupNotify=false
MimeType=text/plain;
NoDisplay=false



add two line below to  /home/chieu/.local/share/applications/mimeapps.list
[Added Associations]
text/plain=netbeans.desktop;


reference : http://standards.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html