JDialog

[Nuclear Mosquito]

How can I make the following JDialog run the getAccountID() mehod when it closes (disposes)? I want to be able to call it from another class in the following way (Or something similar):

int id = NewAccountDialog();

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package sciencepiction;

import javax.swing.JDialog;
import javax.swing.JOptionPane;

/**
 *
 * @author johan
 */
public class NewAccountDialog extends JDialog{

    public NewAccountDialog(){
        initComponents();
        pack();
        setVisible(true);
        this.setModal(true);
    }

    private void initComponents() {

        NameLabel = new javax.swing.JLabel();
        NameTextField = new javax.swing.JTextField();
        PasswordLabel = new javax.swing.JLabel();
        PasswordField = new javax.swing.JPasswordField();
        ConfirmLabel = new javax.swing.JLabel();
        ConfirmField = new javax.swing.JPasswordField();
        GradeLabel = new javax.swing.JLabel();
        GradeComboBox = new javax.swing.JComboBox();
        ConfirmButtom = new javax.swing.JButton();
        CancelButton = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
        setTitle("Create New Account");
        setAlwaysOnTop(true);
        setResizable(false);

        NameLabel.setText("Account Name:");

        NameTextField.setText("Account Name");
        NameTextField.addFocusListener(new java.awt.event.FocusAdapter() {
            public void focusGained(java.awt.event.FocusEvent evt) {
                NameTextFieldFocusGained(evt);
            }
            public void focusLost(java.awt.event.FocusEvent evt) {
                NameTextFieldFocusLost(evt);
            }
        });

        PasswordLabel.setText("Account Password:");

        PasswordField.setText("PasswordFieldStandard");
        PasswordField.addFocusListener(new java.awt.event.FocusAdapter() {
            public void focusGained(java.awt.event.FocusEvent evt) {
                PasswordFieldFocusGained(evt);
            }
            public void focusLost(java.awt.event.FocusEvent evt) {
                PasswordFieldFocusLost(evt);
            }
        });

        ConfirmLabel.setText("Confirm Password:");

        ConfirmField.setText("PasswordFieldStandard");
        ConfirmField.addFocusListener(new java.awt.event.FocusAdapter() {
            public void focusGained(java.awt.event.FocusEvent evt) {
                ConfirmFieldFocusGained(evt);
            }
            public void focusLost(java.awt.event.FocusEvent evt) {
                ConfirmFieldFocusLost(evt);
            }
        });

        GradeLabel.setText("Grade Level:");

        GradeComboBox.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Grade 10", "Grade 11", "Grade 12" }));

        ConfirmButtom.setText("Confirm");
        ConfirmButtom.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                ConfirmButtomMouseClicked(evt);
            }
        });

        CancelButton.setText("Cancel");
        CancelButton.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                CancelButtonMouseClicked(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addContainerGap()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(NameLabel)
                            .addComponent(PasswordLabel))
                        .addGap(146, 146, 146))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(20, 20, 20)
                        .addComponent(NameTextField, javax.swing.GroupLayout.DEFAULT_SIZE, 236, Short.MAX_VALUE))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(20, 20, 20)
                        .addComponent(PasswordField, javax.swing.GroupLayout.DEFAULT_SIZE, 236, Short.MAX_VALUE))
                    .addGroup(layout.createSequentialGroup()
                        .addContainerGap()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(layout.createSequentialGroup()
                                .addGap(10, 10, 10)
                                .addComponent(ConfirmField, javax.swing.GroupLayout.DEFAULT_SIZE, 236, Short.MAX_VALUE))
                            .addComponent(ConfirmLabel)))
                    .addGroup(layout.createSequentialGroup()
                        .addContainerGap()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(layout.createSequentialGroup()
                                .addGap(10, 10, 10)
                                .addComponent(GradeComboBox, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                            .addComponent(GradeLabel)))
                    .addGroup(layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(ConfirmButtom, javax.swing.GroupLayout.DEFAULT_SIZE, 246, Short.MAX_VALUE))
                    .addGroup(layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(CancelButton, javax.swing.GroupLayout.DEFAULT_SIZE, 246, Short.MAX_VALUE)))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(NameLabel)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(NameTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(PasswordLabel)
                .addGap(4, 4, 4)
                .addComponent(PasswordField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(ConfirmLabel)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(ConfirmField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(GradeLabel)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(GradeComboBox, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(ConfirmButtom)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(CancelButton)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        pack();
    }

    private void NameTextFieldFocusGained(java.awt.event.FocusEvent evt) {
        NameTextField.selectAll();
    }

    private void PasswordFieldFocusGained(java.awt.event.FocusEvent evt) {
        PasswordField.selectAll();
    }

    private void ConfirmFieldFocusGained(java.awt.event.FocusEvent evt) {
        ConfirmField.selectAll();
    }

    private void CancelButtonMouseClicked(java.awt.event.MouseEvent evt) {
        dispose();
    }

    private void ConfirmButtomMouseClicked(java.awt.event.MouseEvent evt) {
        if(PasswordField.getText().compareTo("PasswordFieldStandard")==0){
            JOptionPane.showMessageDialog(this,"The account password you have entered is the standard field entry.\nThis can't be used as a password.\nPlease enter a valid account password.","AccountError",JOptionPane.WARNING_MESSAGE);
        }
        else{
            communicateRankings.newAccount(NameTextField.getText(), PasswordField.getText(), (10 + GradeComboBox.getSelectedIndex()));
            ID = communicateRankings.getAccountID(NameTextField.getText());
            dispose();
        }
    }

    private void NameTextFieldFocusLost(java.awt.event.FocusEvent evt) {
        if(NameTextField.getText().length() >30){
            JOptionPane.showMessageDialog(this,"The account name is too long!\nThe maximum amount of characters for an account name is 30.\nPlease enter a shorter account name.","AccountError",JOptionPane.WARNING_MESSAGE);
        }
        else if(communicateRankings.countAccount(NameTextField.getText()) != 0)
        {
            JOptionPane.showMessageDialog(this, "The account name \"" + NameTextField.getText() + "\" is already in use!\nPlease enter another account name that is not in use", "AccountError", JOptionPane.WARNING_MESSAGE);
            NameTextField.setText("Account Name");
        }
    }

    private void PasswordFieldFocusLost(java.awt.event.FocusEvent evt) {
        if(PasswordField.getText().length() >30){
            JOptionPane.showMessageDialog(this,"The account password is too long!\nThe maximum amount of characters for an account password is 30.\nPlease enter a shorter account password.","AccountError",JOptionPane.WARNING_MESSAGE);
            PasswordField.setText("PasswordFieldStandard");
        }
        else if(PasswordField.getText().compareTo("")==0){
            JOptionPane.showMessageDialog(this,"You have entered a blank account password\nPlease enter a valid account password.","AccountError",JOptionPane.WARNING_MESSAGE);
            PasswordField.setText("PasswordFieldStandard");
        }
        ConfirmField.grabFocus();
    }

    private void ConfirmFieldFocusLost(java.awt.event.FocusEvent evt) {
        if(PasswordField.getText().compareTo(ConfirmField.getText())!=0){
            JOptionPane.showMessageDialog(this,"The account password and confirmation password don't match!\nPlease enter a valid confirmation password.","AccountError",JOptionPane.WARNING_MESSAGE);
            PasswordField.setText("PasswordFieldStandard");
            ConfirmField.setText("PasswordFieldStandard");
            PasswordField.grabFocus();
        }
    }

    public int getAccountID(){
        return ID;
    }

    private int ID = -1;
    private DBCommunicateRankings communicateRankings = new DBCommunicateRankings();
    private javax.swing.JButton CancelButton;
    private javax.swing.JButton ConfirmButtom;
    private javax.swing.JPasswordField ConfirmField;
    private javax.swing.JLabel ConfirmLabel;
    private javax.swing.JComboBox GradeComboBox;
    private javax.swing.JLabel GradeLabel;
    private javax.swing.JLabel NameLabel;
    private javax.swing.JTextField NameTextField;
    private javax.swing.JPasswordField PasswordField;
    private javax.swing.JLabel PasswordLabel;

}

[PhHein]

What is that supposed to do?

int id = NewAccountDialog();

You're not setting an owner of your Dialog.
The reference to your dialog won't be null after hiding/disposing it.
The constructor shouldn't call setVisible() in your case.
The calling code should basically look like this:

NewAccountDialog ad = new NewAccountDialog(owner);
ad.setVisible(true); // if modal, the code will stop executing here until dialog is closed
int id = ad.getAccountID();