try {
                
                      File pdfFile = new File(filename);
                      if (pdfFile.exists()) {
           //     Desktop.getDesktop().print(file);
                              if (Desktop.isDesktopSupported()) {
                                    Desktop.getDesktop().open(pdfFile);
                                  
                              } else {
                                      System.out.println("Awt Desktop is not supported!");
                              }
                
                      } else {
                              System.out.println("File is not exists!");
                      }
                
                      System.out.println("Done");
                
                } catch (Exception ex) {
                      ex.printStackTrace();
                }