Find text position in .pdf file?

Question

Java

Good afternoon. I've already spent a day looking for a quick way to find the position of a word in a .pdf file. The point of all this is that in the application you can find the location of the word in the .pdf file and try to bring the screen closer to it on an android device, if you know ways (preferably easier) how this could be implemented, then I will be very grateful for your answer.