Digital Stamp with own information?! (Java Code)

Hi,

I saw a lot of tutroials for how to create a custom digital stamp. For me it wouldnt be a problem toi create a transparent stamp with acutal date. My problem is I need a stamp which asks for informations. i will explain.

I need to put a stamp on a document, with the following information:

Date:

Material:

Acc. No.:

The stamp should be like this if I put it on the pdf, the date should appear, the material and acc no also, but the material and account number should be fields dynamic field which I can edit. I dont know if there is a possibility with java to make a code which asks you for the information. or if I can make right click and then adjust the two fields. I hope there is a possibility.

Best Regards

Lukas