I used the codes from the following the website. And it helped a lot to draw the required object on my screen.

But the problem I am facing is getting the coordinates of my object.

Let me explain. According to the code. You just need to add your graphic images in PNG format and refer it to the class here. What I am trying to achieve is a simple collision detection mechanism. I have added a maze (as PNG). And have a object (as PNG) to go through the blank path within the maze. In order to do this I need to know the blank spaces within the coordinates through which my object will move.

Can any one tell me how to get the blank spaces as (x,y) coordinates through which I can take my object?