ubuntu14.04 the boot bar icon is a gray question mark after installing eclipse

Ubuntu creates eclipse shortcut icons.

Cd/usr/share/applications

sudo touch eclipse.desktop

sudo gedit eclipse.desktop

Enter the following content:

[Desktop Entry]
Encoding=utf-8
name=eclipse platfrom
comment=eclipse IDE
exec=/opt/eclipse/eclipse      // This is the path to your Eclipse folder under Eclipse.exe
icon=/opt/eclipse/icon.xpm    //eclipse folder icon icon.xpm path
terminal= False
startupnotify=true
type=application
categories=application;development;

Save.
Perform:

sudo chmod u+x eclipse.desktop   //convert it into an executable file.

When you open/usr/share/applications/, you will find an Eclipse icon appears.