public static void partitionPdfFile(String pdfFile,              String newFile, int from, int end) {          Document document = null;          PdfCopy copy = null;                  try {              PdfReader reader = new PdfReader(pdfFile);                        int n = reader.getNumberOfPages();                        if(end==0){                  end = n;              }              ArrayList
     
       savepaths = new ArrayList
      
       ();              String staticpath = pdfFile.substring(0, pdfFile.lastIndexOf("\\")+1);              String savepath = staticpath+ newFile;              savepaths.add(savepath);              document = new Document(reader.getPageSize(1));              copy = new PdfCopy(document, new FileOutputStream(savepaths.get(0)));              document.open();              for(int j=from; j<=end; j++) {                document.newPage();                PdfImportedPage page = copy.getImportedPage(reader, j);                copy.addPage(page);            }            document.close();