Program: 78375
Project: 78375
Buggy source:
/** 
 * inizializza le componenti dell'interfaccia
 */
private void initComponents(){
  panelOut.setLayout(new BorderLayout());
  panelData.setLayout(new GridLayout(11,1,40,5));
  panelData.setBorder(BorderFactory.createTitledBorder("String_Node_Str"));
  panelPayment.setBorder(BorderFactory.createTitledBorder("String_Node_Str"));
  panelPayment.setLayout(new GridLayout(5,1,40,5));
  panelOut.add(panelData,BorderLayout.NORTH);
  panelOut.add(panelPayment,BorderLayout.CENTER);
  panelOut.add(panelButton,BorderLayout.SOUTH);
  panelData.add(labelName);
  panelData.add(textName);
  panelData.add(labelSurname);
  panelData.add(textSurname);
  panelData.add(labelDate);
  for (int years=1930; years <= Calendar.getCurrentYear(); years++) {
    years_tmp.add(years + "String_Node_Str");
  }
  dayList=new JComboBox<>(day);
  monthList=new JComboBox<>(month);
  yearList=new JComboBox(years_tmp.toArray());
  panelDate.setLayout(new GridLayout(1,3,5,5));
  panelDate.add(dayList);
  panelDate.add(monthList);
  panelDate.add(yearList);
  panelData.add(panelDate);
  panelData.add(labelEmail);
  panelData.add(textEmail);
  panelData.add(labelPassword);
  panelData.add(textPassword);
  panelData.add(labelConfirmPassword);
  panelData.add(textConfirmPassword);
  panelData.add(labelCountry);
  panelData.add(textCountry);
  panelData.add(labelCity);
  panelData.add(textCity);
  panelData.add(labelCap);
  panelData.add(textCap);
  panelData.add(labelAddress);
  panelAddress.setLayout(new BoxLayout(panelAddress,BoxLayout.X_AXIS));
  panelAddress.add(textStreet);
  panelAddress.add(textStreetNumber);
  panelData.add(panelAddress);
  panelData.add(labelPhoneNumber);
  panelData.add(textPhoneNumber);
  panelPayment.add(labelCreditCardOwnerName);
  panelPayment.add(textCreditCardOwnerName);
  panelPayment.add(labelCrediCardOwnerSurname);
  panelPayment.add(textCreditCardOwneSurname);
  panelPayment.add(labelCreditCardNumber);
  panelPayment.add(textCreditCardNumber);
  panelPayment.add(labelExpirationDate);
  expirationMonth=new JComboBox<>(expirationMonths);
  expirationYear=new JComboBox<>(expirationYears);
  textExpirationDays.setEditable(false);
  labelExpirationDate.setLabelFor(textExpirationDays);
  panelExpiration.setLayout(new GridLayout(1,3,5,5));
  panelExpiration.add(textExpirationDays);
  panelExpiration.add(expirationMonth);
  panelExpiration.add(expirationYear);
  panelPayment.add(panelExpiration);
  panelPayment.add(labelSecurityCode);
  panelPayment.add(textSecurityCode);
  add(panelOut);
  panelButton.setLayout(new GridLayout(1,2,5,5));
  panelButton.setBorder(BorderFactory.createEmptyBorder(30,90,10,90));
  panelButton.add(buttonCancel,BorderLayout.SOUTH);
  panelButton.add(buttonCustomerConfirm,BorderLayout.SOUTH);
  ActionListener registration=new ActionListener(){
    @Override public void actionPerformed(    ActionEvent registrationAe){
      if (registrationAe.getActionCommand().equals("String_Node_Str")) {
        Password="String_Node_Str";
        confirmPassword="String_Node_Str";
        Password=readPassword(textPassword.getPassword());
        confirmPassword=readPassword(textConfirmPassword.getPassword());
        if (textName.getText().equals("String_Node_Str") || textSurname.getText().equals("String_Node_Str") || textCountry.getText().equals("String_Node_Str")|| textCity.getText().equals("String_Node_Str")|| textCap.getText().equals("String_Node_Str")|| textStreet.getText().equals("String_Node_Str")|| textStreetNumber.getText().equals("String_Node_Str")|| textPhoneNumber.getText().equals("String_Node_Str")|| Password == "String_Node_Str" || confirmPassword == "String_Node_Str" || textCreditCardOwnerName.getText().equals("String_Node_Str") || textCreditCardOwneSurname.getText().equals("String_Node_Str") || textCreditCardNumber.getText().equals("String_Node_Str") || textSecurityCode.getText().equals("String_Node_Str")) {
          JOptionPane.showMessageDialog(new JFrame(),"String_Node_Str","String_Node_Str",JOptionPane.ERROR_MESSAGE);
        }
 else         if (checkEmail(textEmail.getText())) {
          boolean inputPassword=changePasswordFields(Password,confirmPassword);
          boolean inputCap=checkCapNumber(textCap.getText());
          boolean inputAddressNumber=checkAddressNumber(textStreetNumber.getText());
          boolean inputPhoneNumber=checkPhoneNumber(textPhoneNumber.getText());
          if (inputPassword && inputCap && inputAddressNumber&& inputPhoneNumber) {
            boolean inputCrediCardNumber=checkCreditCardNumber(textCreditCardNumber.getText());
            Date inputDate=getNewExpirationDate();
            boolean inputCvv=checkCvvNumber(textSecurityCode.getText());
            if (inputCrediCardNumber && !(dateBeforeToday(inputDate)) && inputCvv) {
              boolean add=addCustomerValues();
              if (add) {
                JOptionPane.showMessageDialog(new JFrame(),"String_Node_Str","String_Node_Str",JOptionPane.INFORMATION_MESSAGE);
                GUICustomerLabel guiCustomerLabel=new GUICustomerLabel(textEmail.getText().toUpperCase(),guiSignUp);
                guiCustomerLabel.setVisible(true);
                dispose();
              }
            }
          }
        }
      }
      if (registrationAe.getActionCommand().equals("String_Node_Str")) {
        System.exit(0);
      }
    }
  }
;
  buttonCancel.addActionListener(registration);
  buttonCustomerConfirm.addActionListener(registration);
}

Fixed version (ground truth):
/** 
 * inizializza le componenti dell'interfaccia
 */
private void initComponents(){
  panelOut.setLayout(new BorderLayout());
  panelData.setLayout(new GridLayout(11,1,40,5));
  panelData.setBorder(BorderFactory.createTitledBorder("String_Node_Str"));
  panelPayment.setBorder(BorderFactory.createTitledBorder("String_Node_Str"));
  panelPayment.setLayout(new GridLayout(5,1,40,5));
  panelOut.add(panelData,BorderLayout.NORTH);
  panelOut.add(panelPayment,BorderLayout.CENTER);
  panelOut.add(panelButton,BorderLayout.SOUTH);
  panelData.add(labelName);
  panelData.add(textName);
  panelData.add(labelSurname);
  panelData.add(textSurname);
  panelData.add(labelDate);
  for (int years=1930; years <= Calendar.getCurrentYear(); years++) {
    years_tmp.add(years + "String_Node_Str");
  }
  dayList=new JComboBox<>(day);
  monthList=new JComboBox<>(month);
  yearList=new JComboBox(years_tmp.toArray());
  panelDate.setLayout(new GridLayout(1,3,5,5));
  panelDate.add(dayList);
  panelDate.add(monthList);
  panelDate.add(yearList);
  panelData.add(panelDate);
  panelData.add(labelEmail);
  panelData.add(textEmail);
  panelData.add(labelPassword);
  panelData.add(textPassword);
  panelData.add(labelConfirmPassword);
  panelData.add(textConfirmPassword);
  panelData.add(labelCountry);
  panelData.add(textCountry);
  panelData.add(labelCity);
  panelData.add(textCity);
  panelData.add(labelCap);
  panelData.add(textCap);
  panelData.add(labelAddress);
  panelAddress.setLayout(new BoxLayout(panelAddress,BoxLayout.X_AXIS));
  panelAddress.add(textStreet);
  panelAddress.add(textStreetNumber);
  panelData.add(panelAddress);
  panelData.add(labelPhoneNumber);
  panelData.add(textPhoneNumber);
  panelPayment.add(labelCreditCardOwnerName);
  panelPayment.add(textCreditCardOwnerName);
  panelPayment.add(labelCrediCardOwnerSurname);
  panelPayment.add(textCreditCardOwneSurname);
  panelPayment.add(labelCreditCardNumber);
  panelPayment.add(textCreditCardNumber);
  panelPayment.add(labelExpirationDate);
  expirationMonth=new JComboBox<>(expirationMonths);
  expirationYear=new JComboBox<>(expirationYears);
  textExpirationDays.setEditable(false);
  labelExpirationDate.setLabelFor(textExpirationDays);
  panelExpiration.setLayout(new GridLayout(1,3,5,5));
  panelExpiration.add(textExpirationDays);
  panelExpiration.add(expirationMonth);
  panelExpiration.add(expirationYear);
  panelPayment.add(panelExpiration);
  panelPayment.add(labelSecurityCode);
  panelPayment.add(textSecurityCode);
  add(panelOut);
  panelButton.setLayout(new GridLayout(1,2,5,5));
  panelButton.setBorder(BorderFactory.createEmptyBorder(30,90,10,90));
  panelButton.add(buttonCancel,BorderLayout.SOUTH);
  panelButton.add(buttonCustomerConfirm,BorderLayout.SOUTH);
  ActionListener registration=new ActionListener(){
    @Override public void actionPerformed(    ActionEvent registrationAe){
      if (registrationAe.getActionCommand().equals("String_Node_Str")) {
        Password="String_Node_Str";
        confirmPassword="String_Node_Str";
        Password=readPassword(textPassword.getPassword());
        confirmPassword=readPassword(textConfirmPassword.getPassword());
        if (textName.getText().equals("String_Node_Str") || textSurname.getText().equals("String_Node_Str") || textCountry.getText().equals("String_Node_Str")|| textCity.getText().equals("String_Node_Str")|| textCap.getText().equals("String_Node_Str")|| textStreet.getText().equals("String_Node_Str")|| textStreetNumber.getText().equals("String_Node_Str")|| textPhoneNumber.getText().equals("String_Node_Str")|| Password == "String_Node_Str" || confirmPassword == "String_Node_Str" || textCreditCardOwnerName.getText().equals("String_Node_Str") || textCreditCardOwneSurname.getText().equals("String_Node_Str") || textCreditCardNumber.getText().equals("String_Node_Str") || textSecurityCode.getText().equals("String_Node_Str")) {
          JOptionPane.showMessageDialog(new JFrame(),"String_Node_Str","String_Node_Str",JOptionPane.ERROR_MESSAGE);
        }
 else         if (checkEmail(textEmail.getText())) {
          boolean inputPassword=changePasswordFields(Password,confirmPassword);
          boolean inputCap=checkCapNumber(textCap.getText());
          boolean inputAddressNumber=checkAddressNumber(textStreetNumber.getText());
          boolean inputPhoneNumber=checkPhoneNumber(textPhoneNumber.getText());
          if (inputPassword && inputCap && inputAddressNumber&& inputPhoneNumber) {
            boolean inputCrediCardNumber=checkCreditCardNumber(textCreditCardNumber.getText());
            Date inputDate=getNewExpirationDate();
            boolean inputCvv=checkCvvNumber(textSecurityCode.getText());
            if (inputCrediCardNumber && !(dateBeforeToday(inputDate)) && inputCvv) {
              boolean add=addCustomerValues();
              if (add) {
                JOptionPane.showMessageDialog(new JFrame(),"String_Node_Str","String_Node_Str",JOptionPane.INFORMATION_MESSAGE);
                GUICustomerLabel guiCustomerLabel=new GUICustomerLabel(textEmail.getText().toUpperCase(),guiSignUp);
                guiCustomerLabel.setVisible(true);
                guiSignUp.setVisible(false);
              }
            }
          }
        }
      }
    }
  }
;
  buttonCancel.addActionListener(e -> guiSignUp.dispatchEvent(new WindowEvent(guiSignUp,WindowEvent.WINDOW_CLOSING)));
  buttonCustomerConfirm.addActionListener(registration);
}