public static void main(String[] args) throws Exception {

        StopWatch stopwatch = new StopWatch();
        stopwatch.start();


        File folder = new File("D:\PDF1");
        File[] listOfFiles = folder.listFiles();

        for (File file : listOfFiles) {
            if (file.isFile()) {
                HashSet<String> uniqueWords = new HashSet<>();
                String path = "D:\PDF1\" + file.getName();
                try (PDDocument document = PDDocument.load(new File(path))) {

                    if (!document.isEncrypted()) {

                        PDFTextStripper tStripper = new PDFTextStripper();
                        String pdfFileInText = tStripper.getText(document);
                        String lines[] = pdfFileInText.split("\r?\n");
                        for (String line : lines) {
                            String[] words = line.split(" ");



                            for (String word : words) {
                                // check if one or more special characters at end of string then remove OR
                                // check special characters in beginning of the string then remove
                               uniqueWords.add(word.replaceAll("([\W]+$)|(^[\W]+)", ""));




                            }

                        }


                    }
                } catch (IOException e) {
                    System.err.println("Exception while trying to read pdf document - " + e);
                }
                String[] words1 = uniqueWords.toArray(new String[uniqueWords.size()]);



                MysqlAccessIndex connection = new MysqlAccessIndex();



                    connection.readDataBase(path, words1);



                System.out.println("Completed");

            }
        }