I'll bet you dollars to donuts that "instance.toString()" does not return anything remotely resembling what you seem to assume it returns.
Joined: Oct 20, 2011
Thanks for your response. Could you please help me to achieve the target?
Joined: Sep 21, 2011
Depends on what you intend to do. It looks like you're trying to convert a PDF to a (series of) images. I've never tried that, but I noticed that the com.lowagie.text.Image class has methods called getOriginalData and getOriginalType; those might be useful for that task.
If that's all you're trying to do, you might check out the PDFBox library, which has this functionality (amongst others).