Using Google Maps with Java on a Desktop Application

Using Google Maps with Java on a Desktop Application

I want to use Google Maps on my java based application.
My application would overlay images on maps based on latitude and
longitude and change position of these images with time. The time interval
will be very short so it needs to be efficient.
Currently I can find following solution, but none of these works :
1) Using Qt WebKit through Qt Jambi : This will just open Google Maps in
browser over my application, I would not have control of overlaying images
on top of the Map, according to the lat/long.
2) Using Google Maps Image API : This would open image, but I would not be
able to translate the location in lat/long into coordinates in image, also
as the position of images are changing I will need zoom-in and zoom out
feature, which will be unavailable here.
Is there an exiting solution which fits my need?
Thanks!