Frame dialog data exchange : Frame « Swing JFC « Java

Frame dialog data exchange

Frame dialog data exchange

import java.awt.Container;
import java.awt.GridLayout;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

public class DataExchangeTest extends JFrame implements ActionListener {
  private ConnectDialog dialog = null;

  private JMenuItem connectItem = new JMenuItem("Connect");

  public DataExchangeTest() {
    setTitle("Data Exchange");
    setSize(300, 300);
    addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {

    JMenuBar mbar = new JMenuBar();
    JMenu fileMenu = new JMenu("File");

  public void actionPerformed(ActionEvent evt) {
    Object source = evt.getSource();
    if (source == connectItem) {
      UserInfo transfer = new UserInfo("yourname", "pw");
      dialog = new ConnectDialog(this);
      if (dialog.showDialog(transfer)) {
        String name = transfer.username;
        String pwd = transfer.password;
        Container contentPane = getContentPane();
        contentPane.add(new JLabel("username=" + name + ", password="  + pwd), "Center");

  public static void main(String[] args) {
    JFrame f = new DataExchangeTest();;


class UserInfo {
  public String username;

  public String password;

  public UserInfo(String u, String p) {
    username = u;
    password = p;

class ConnectDialog extends JDialog implements ActionListener {

  private JTextField username = new JTextField("");

  private JPasswordField password= new JPasswordField("");

  private boolean okPressed;

  private JButton okButton;

  private JButton cancelButton;

  public ConnectDialog(JFrame parent) {
    super(parent, "Connect", true);
    Container contentPane = getContentPane();
    JPanel p1 = new JPanel(new GridLayout(2, 2,3,3));
    p1.add(new JLabel("User name:"));
    p1.add(new JLabel("Password:"));
    p1.add(password );
    contentPane.add("Center", p1);

    Panel p2 = new Panel();
    okButton = addButton(p2, "Ok");
    cancelButton = addButton(p2, "Cancel");
    contentPane.add("South", p2);
    setSize(240, 120);

  private JButton addButton(Container c, String name) {
    JButton button = new JButton(name);
    return button;

  public void actionPerformed(ActionEvent evt) {
    Object source = evt.getSource();
    if (source == okButton) {
      okPressed = true;
    } else if (source == cancelButton)

  public boolean showDialog(UserInfo transfer) {
    okPressed = false;
    if (okPressed) {
      transfer.username = username.getText();
      transfer.password = new String(password.getPassword());
    return okPressed;


Related examples in the same category

1.The Swing Version of the Hello, World! Program
2.Using anonymous inner classesUsing anonymous inner classes
3.No direct interaction with JRootPaneNo direct interaction with JRootPane
4.A demonstration of the WindowListener approach to closing JFramesA demonstration of the WindowListener approach to closing JFrames
5.How to center a frame or dialogHow to center a frame or dialog
6.React to frame close actionReact to frame close action
7.Create a frameCreate a frame
8.Draw on frame with keyboardDraw on frame with keyboard
9.Frame with componentsFrame with components
10.Default button for frame: press Enter to activateDefault button for frame: press Enter to activate
11.Frame Icon drawn by yourselfFrame Icon drawn by yourself
12.Create a JFrame class in a thread-safe way
13.Demo to show a way of having More Choices or Less ChoicesDemo to show a way of having More Choices or Less Choices
14.Frame Icon from gifFrame Icon from gif
15.FrameDemo:invoked from the event-dispatching thread FrameDemo:invoked from the event-dispatching thread
16.Screen edge snapping
17.Creating a Borderless Window
18.Disabling the Close Button on a JFrame
19.Exiting an Application When a JFrame Is Closed
20.Use Component listener to ensure frame visibilities
21.Drag and move a frame from its content area
22.Setting the Icon for a Frame
23.Removing the Title Bar of a Frame
24.Setting the Bounds for a Maximized Frame
25.Iconifies a frame; the maximized bits are not affected.
26.Deiconifies a frame; the maximized bits are not affected.
27.Hiding a Frame When Its Close Button Is Clicked
28.Exiting an Application When a Frame Is Closed
29.Getting All Created Frames in an Application
30.Maximizes a frame; the iconified bit is not affected
31.Making a Frame Non-Resizable: use setResizable(false) to freeze a frame's size.
32.Determining When a Frame or Window Is Opened or Closed
33.Determining When a Frame or Window Is Iconized or Maximized
34.Determining When a Component Has Been Made Visible, Moved, or Resized
35.Get the JFrame of a component
36.Disable JFrame close button
37.Handle JFrame window events
38.Define the default close operation of a JFrame to EXIT_ON_CLOSE, application will exit by calling System.exit()
39.Center a JFrame
40.Creating Frames with a background image
41.Preventing a Window from Gaining the Focus
42.Create undecorated frame
43.Make a JFrame always visible
44.Maximize a JFrame
45.Close a JFrame under condition
46.Creating a Titleless and Borderless JFrame shows off the window decoration features added in 1.4
48.JFrame that closes when someone presses the ESC key
49.Show the given frame as modal to the specified owner
50.Set Frame Location By Platform