// ======================================
// Adding Slide Comments
// ======================================
Presentation pres = new Presentation();

// Adding Empty slide
pres.getSlides().addEmptySlide(pres.getLayoutSlides().get_Item(0));

// Adding Author
ICommentAuthor author = pres.getCommentAuthors().addAuthor("Aspose", "AS");

// Position of comments
java.awt.geom.Point2D.Float point = new java.awt.geom.Point2D.Float(0.2f, 0.2f);
java.util.Date date = new java.util.Date();

// Adding slide comment for an author on slide 1
author.getComments().addComment("Hello Aspose, this is slide comment",
        pres.getSlides().get_Item(0), point, date);

// Adding slide comment for an author on slide 1
author.getComments().addComment("Hello Aspose, this is second slide comment",
        pres.getSlides().get_Item(1), point, date);

// Accessing ISlide 1
ISlide slide = pres.getSlides().get_Item(0);

// if null is passed as an argument then it will bring comments from all
// authors on selected slide
IComment[] Comments = slide.getSlideComments(author);

// Accessing the comment at index 0 for slide 1
String str = Comments[0].getText();

pres.save("data/AsposeComments.pptx", SaveFormat.Pptx);

if (Comments.length > 0)
{
    // Select comments collection of Author at index 0
    ICommentCollection commentCollection = Comments[0].getAuthor().getComments();

    String Comment = commentCollection.get_Item(0).getText();
}

// ======================================
// Accessing Slide Comments
// ======================================

// Presentation pres = new Presentation("data/AsposeComments.pptx");
for (ICommentAuthor author1 : pres.getCommentAuthors())
{
    for (IComment comment : author1.getComments())
    {
        System.out.println("ISlide :"
            + comment.getSlide().getSlideNumber()
            + " has comment: " + comment.getText()
            + " with Author: " + comment.getAuthor().getName()
            + " posted on time :" + comment.getCreatedTime() + "\n");
    }
}