My problem is that, i can't import a embedded xls-file in to a ppt slide.
Does anyone have a solution for this problem?
Thank you for your help.

Here is my code:

class createPPT {

public static void main(String[] args) throws IOException, OpenXML4JException, XmlException{

//load existing ppt-file with embedded files
XMLSlideShow ppt = new XMLSlideShow(new FileInputStream("C:\\Users\\..."));

//get the layout of the slide master
XSLFSlideLayout layout_ppt = ppt.getSlideMasters()[0].getLayout(ppt.getSlideMasters()[0].getSlideLayouts()[0].getType());

//create a new ppt-slide
XSLFSlide slide = ppt.createSlide(layout_ppt);

//save all embedded files in listemb, the first item is a xls-file
java.util.List<PackagePart> listemb = ppt.getAllEmbedds();

//load xls-file in poifs
POIFSFileSystem poifs = new POIFSFileSystem(listemb.get(0).getInputStream());

//here i want to import the embedded xls-file in a new ppt-slide

//save new ppt-file
FileOutputStream out = new FileOutputStream("C:\\Users\\...");