public class PowerPoint {

  public static void main(String[] args) throws Exception {
	// we are new PPTX Presentation
	XMLSlideShow ppt = new XMLSlideShow();
	// we add a new slide
	XSLFSlideMaster defaultMaster = ppt.getSlideMasters().get(0);
	// retrieving a the slide layout
	XSLFSlideLayout layout = defaultMaster.getLayout(SlideLayout.TITLE_ONLY);

	// we create the first slide
	XSLFSlide slide = ppt.createSlide(layout);

    // ...
  }
}