Hi, can someone tell me how to replace texts in a pdf file without creating a new pdf file? Or can I overwrite a text file like other editors do? [closed]

I was working with iText7 in Java, and want to know how this can be done today in 2022. Did not find much ways for the same.If not this, can someone explain how vs code or other editors overwrite existing files ie the save option and not the save as option.