docx4j pptx loading

sample.java

            PresentationMLPackage presentationMLPackage =
                    (PresentationMLPackage) OpcPackage.load(new java.io.File("src/resources/testPresentation.pptx"));

            System.out.printf("Slide count: %d", presentationMLPackage.getMainPresentationPart().getSlideCount());

            MainPresentationPart mdp = presentationMLPackage.getMainPresentationPart();
            
            String notesFromSlide = mdp.getSlide(0).getNotesSlidePart().getContents().toString();

            System.out.printf("Slide 1 notes: %s", notesFromSlide);

getNotesSlidePart() won't create the Notes part; it will return null if there isn't a notes part in the deck.

So you have to check for null.

There is method createNotesSlidePart(NotesMasterPart nmp)

@plutext Sorry, should have been clearer - in this example some notes/content already exist, I'm simply trying to read them (and evenutally update them). I naively assumed the getContents call would return the string contents, but I think i'm missing a step around wrangling the XML that method returns

Instead of getContents, try getXML()

Yes, that works (returns the XML). I'd then need to parse that XML correctly, I was looking for a lovely convenience feature to handle all of that for me :-) - i.e to get just the text contents of the notes, or to update the text of the slide notes. I'll keep digging...

(Thanks for the help btw!)