Файл не сохранен

Question

любой может указать, почему он не позволяет мне сохранить мой файл бронирования? Это дает мне исключение после попытки сохранить имя клиента. Не могу увидеть ошибки, так что не знаю точно, что не так. Благодаря

private void savebookingButtonActionPerformed(java.awt.event.ActionEvent evt) {             
     Booking customerbooking = new Booking(); 
     Customer customerfile = customerbooking.getCustomer(); 

     try { 
      if (custnameTF.getText().equals("")) { 
       throw new EmptyField("Please Insert Customer"); 
      } else { 
       FileOutputStream fos = new FileOutputStream("Bookings/" + custidTF.getText() + ".txt"); 
       ObjectOutputStream oos = new ObjectOutputStream(fos); 

       customerfile.setPersonName((custnameTF.getText())); 
       customerfile.setPersonSurname((custsurnameTF.getText())); 
       customerfile.setPersonID((custidTF.getText())); 
       customerfile.setConsultantname(consnameTF.getText()); 
       customerfile.setConsultantsurname((conssurnameTF.getText())); 
       customerfile.setConsulid(considTF.getText()); 
       customerbooking.setFlightlocation(locationCB.getSelectedItem().toString()); 
       customerbooking.setFlighttime(timeCB.getSelectedItem().toString()); 
       customerbooking.setFlightfee(feeCB.getSelectedItem().toString()); 
       customerbooking.setCar(carRB.isSelected()); 
       customerbooking.setInsurance(insuranceRB.isSelected()); 

       oos.writeObject(customerbooking); 
       oos.close(); 
       fos.close(); 

       custnameTF.setText(""); 
       custsurnameTF.setText(""); 
       custidTF.setText(""); 
       considTF.setText(""); 
       consnameTF.setText(""); 
       conssurnameTF.setText(""); 
       locationCB.setSelectedItem(""); 
       timeCB.setSelectedItem(""); 
       feeCB.setSelectedItem(""); 

       JOptionPane.showMessageDialog(this, "Booking was Saved Successfully!", 
         "Success", JOptionPane.INFORMATION_MESSAGE); 
      } 

     } catch (IOException e) { 
      JOptionPane.showMessageDialog(this, "Booking could not be Saved!", 
        "Error!", JOptionPane.INFORMATION_MESSAGE); 
     } catch (EmptyField ex) { 
      JOptionPane.showMessageDialog(this, "Please Insert Customer", 
        "Error", JOptionPane.INFORMATION_MESSAGE); 
     } 

     dispose(); 

    }         

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException 
    at airline.booking.system.BookingFrame.savebookingButtonActionPerformed(BookingFrame.java:357) 
    at airline.booking.system.BookingFrame.access$200(BookingFrame.java:21) 
    at airline.booking.system.BookingFrame$3.actionPerformed(BookingFrame.java:102) 
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022) 
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2346) 
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) 
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259) 
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252) 
    at java.awt.Component.processMouseEvent(Component.java:6525) 
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3324) 
    at java.awt.Component.processEvent(Component.java:6290) 
    at java.awt.Container.processEvent(Container.java:2234) 
    at java.awt.Component.dispatchEventImpl(Component.java:4881) 
    at java.awt.Container.dispatchEventImpl(Container.java:2292) 
    at java.awt.Component.dispatchEvent(Component.java:4703) 
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898) 
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533) 
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462) 
    at java.awt.Container.dispatchEventImpl(Container.java:2278) 
    at java.awt.Window.dispatchEventImpl(Window.java:2750) 
    at java.awt.Component.dispatchEvent(Component.java:4703) 
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:751) 
    at java.awt.EventQueue.access$500(EventQueue.java:97) 
    at java.awt.EventQueue$3.run(EventQueue.java:702) 
    at java.awt.EventQueue$3.run(EventQueue.java:696) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75) 
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86) 
    at java.awt.EventQueue$4.run(EventQueue.java:724) 
    at java.awt.EventQueue$4.run(EventQueue.java:722) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75) 
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:721) 
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201) 
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) 
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) 
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) 
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) 
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82) 

Answer 1

При проверке custnameTF.getText() вы на самом деле не проверять, если она равна нулю. Существует различие между пустой строкой и пустой строкой. Добавьте в чек как custnameTF.getText() != null, и это должно выбросить исключение, которое вы запрограммировали, а не перейти к нулевому указателю.