I found and read this thread but I'm not sure if this answeres my question since I'm a beginner. Is there a way to do this which is not too complicated? How can my Java program store files inside of its .jar file?
So my program creates files outside of the .jar file while running:
wwbCopy = Workbook.createWorkbook(new File("bstnCopy.xls"), wbook);
The Files are automatically created in the Folder where the .jar file is executed.