From the Oracle doc on the NullPointerException:
Thrown when an application attempts to use
null
in a case where an object is required. These include:
- Calling the instance method of a
null
object.- Accessing or modifying the field of a
null
object.- Taking the length of
null
as if it were an array.- Accessing or modifying the slots of
null
as if it were an array.- Throwing
null
as if it were aThrowable
value.
It is likely that you have got your reference for your image wrong, or that your image is in the wrong place in your eclipse project. You should store your images in the resources folder and check the references to the image.