Presentation pres = new Presentation("data/demo.pptx");
//Access first slide
ISlide slide = pres.getSlides().get_Item(0);
IShape shape= null;
//Iterate through the shapes and set a reference to the table found
for (int i = 0 ; i < slide.getShapes().size() ; i++)
{
shape = slide.getShapes().get_Item(i);
if (shape.getPlaceholder() != null)
{
//Change the text of each placeholder
((IAutoShape)shape).getTextFrame().setText("This is Placeholder");
}
}