java.awt.AWTEvent java code examples

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private void handleEvent(AWTEvent event) {
  MagePane frame = activeFrame;
  // support multiple mage panes
  Object source = event.getSource();
  if (source instanceof Component) {
    Component component = (Component) source;
    while (component != null) {
      if (component instanceof MagePane) {
        frame = (MagePane) component;
        break;
      }
      component = component.getParent();
    }
  }
  if (frame != null) {
    frame.handleEvent(event);
  }
}

JFrame f = new JFrame("Listeners");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JCheckBox b = new JCheckBox("JCheckBox");
b.addActionListener(new ActionListener() {
    System.out.println(e.getID() == ActionEvent.ACTION_PERFORMED
      ? "ACTION_PERFORMED" : e.getID());
p.add(b);
f.add(p);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);

long eventMask = AWTEvent.MOUSE_MOTION_EVENT_MASK + AWTEvent.MOUSE_EVENT_MASK;
 Toolkit.getDefaultToolkit().addAWTEventListener(new AWTEventListener() {
   public void eventDispatched(AWTEvent e) {
     System.out.println(e.paramString()+"-"+e.getSource());
   }
 }, eventMask);

/**
 * Indicates whether the id of the given event is equal to {@code WindowEvent.COMPONENT_SHOWN} and the source of the
 * event is a {@code Window}.
 * 
 * @param e the given event.
 * @return {@code true} if the id of the given event is equal to {@code COMPONENT_SHOWN} and the source of the event
 *         is a {@code Window}; {@code false} otherwise.
 */
public static boolean wasWindowShown(@Nonnull AWTEvent e) {
 return e.getID() == COMPONENT_SHOWN && e.getSource() instanceof Window;
}

JButton b1 = new JButton("B1");
JButton b2 = new JButton("B2");
tf2.setEnabled(false);
focusList = new Component[]{tf1, b1, tf2, b2, tf3};
JPanel panel = new JPanel(new GridLayout(5, 1));
panel.add(tf1);
panel.add(b1);
panel.add(tf2);
panel.add(b2);
panel.add(tf3);
frame = new JFrame();
frame.setFocusTraversalPolicy(new MyFocusTraversalPolicy());
frame.add(panel);
frame.pack();
frame.setLocation(150, 100);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
KeyboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventDispatcher(new KeyEventDispatcher() {
    if (ke.getID() == KeyEvent.KEY_PRESSED) {
      if (ke.getKeyCode() == KeyEvent.VK_TAB) {
        Component comp = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
        if (comp.isEnabled() == false) {
          if (ke.isShiftDown()) {
            KeyboardFocusManager.getCurrentKeyboardFocusManager().focusPreviousComponent();

header.getActionMap().put("toggleSortOrder2", new AbstractAction() {
    e.setSource(table);
    table.getActionMap().get("focusHeader").actionPerformed(e);
    if (selectedColumn != null) {
      int i = header.getColumnModel().getColumnIndex(selectedColumn);
    header.repaint();
InputMap im = header.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
im.put(KeyStroke.getKeyStroke(KeyEvent.VK_F8, 0), "toggleSortOrder2");
header.addMouseListener(new MouseAdapter() {
header.setToolTipText("Sorting by F8");
JPanel p = new JPanel(new BorderLayout());
p.add(new JScrollPane(table));
return p;
JFrame f = new JFrame();
f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
f.getContentPane().add(new SelectedColumnTest().makeUI());
f.setSize(320, 240);
f.setLocationRelativeTo(null);
f.setVisible(true);

 ((JSlider)getComponent(slider)).setValue(value);
public void doLayout()
 Insets i=getInsets();
 int x=i.left, y=i.top, width=getWidth()-x-i.right, height=getHeight()-y-i.bottom;
 for(int ix=0, n=getComponentCount(); ix<n; ix++)
  getComponent(ix).setBounds(x, y, width, height);
  if(e.getID()==MouseEvent.MOUSE_PRESSED) active=sl;
  else if(e.getID()==MouseEvent.MOUSE_RELEASED) active=null;
  if(e.getID()==MouseEvent.MOUSE_CLICKED)
  e.setSource(this);
  super.processMouseEvent(e);
 protected void processMouseMotionEvent(MouseEvent e)
  if(e.getID()==MouseEvent.MOUSE_MOVED)
   toAllSliders(e);
  else
  e.setSource(this);
  super.processMouseMotionEvent(e);
 repaint();
 slider.setFocusable(false);

setLayout(new BorderLayout());
mouseWheelListener = createMouseWheelListener();
tipArea = new JTextArea(rows, columns);
    JComponent component = getComponent();
    if (component != null) {
      tipArea.dispatchEvent(new MouseWheelEvent(tipArea, e.getID(),
          e.getWhen(), e.getModifiers(), 0, 0, e.getClickCount(),
          e.isPopupTrigger(), e.getScrollType(), e.getScrollAmount(),
JComponent component = getComponent();
if (component != null) {
  component.addMouseWheelListener(mouseWheelListener);
JComponent component = getComponent();
if (component != null) {
  component.removeMouseWheelListener(mouseWheelListener);
return getComponent(0).getPreferredSize();
      e.printStackTrace();
    f.setVisible(true);

 p.add(new JLayer<JTabbedPane>(tabbedPane, new CloseableTabbedPaneLayerUI()));
 p.add(new JButton(new AbstractAction("add tab") {
  @Override public void actionPerformed(ActionEvent e) {
   tabbedPane.addTab("test", new JPanel());
 JFrame f = new JFrame();
 f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
 f.getContentPane().add(new CloseableTabbedPaneTest().makeUI());
 f.setSize(320, 240);
 f.setLocationRelativeTo(null);
 f.setVisible(true);
public CloseableTabbedPaneLayerUI() {
 super();
 button.setBorder(BorderFactory.createEmptyBorder());
 button.setFocusPainted(false);
 button.setBorderPainted(false);
 if (e.getID() == MouseEvent.MOUSE_CLICKED) {
  pt.setLocation(e.getPoint());
  JTabbedPane tabbedPane = (JTabbedPane) l.getView();
  l.getView().repaint();
  tabbedPane.repaint(tabbedPane.getBoundsAt(index));
 } else {
  tabbedPane.repaint();

if (event instanceof FocusEvent) {
  FocusEvent focusEvent = (FocusEvent) event;
  if (focusEvent.getID() == FocusEvent.FOCUS_LOST) {
    Component focusTo = focusEvent.getOppositeComponent();
    Component focusFrom = focusEvent.getComponent();
    if (focusTo == null || !focusTo.getParent().equals(table)) {
  if (mouseEvent.getID() == MouseEvent.MOUSE_CLICKED) {
    Component focusOwner = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
    JTable table = getTableFrom(focusOwner);
    System.out.println("focusOwner = " + focusOwner);
    if ((table != null && mouseEvent.getComponent() != table) && (focusOwner != null && !focusOwner.getParent().equals(table))) {
      stopCellEditing(table);
      clearSelection(table);
if (component instanceof JTable) {
  table = (JTable) component;
} else if (component != null && component.getParent() instanceof JTable) {
  table = (JTable) component.getParent();

  enableEvents(AWTEvent.MOUSE_EVENT_MASK | AWTEvent.MOUSE_MOTION_EVENT_MASK);
  g.fillRect(0, 0, getWidth(), getHeight());
  if (e.getID() == MouseEvent.MOUSE_PRESSED && e.getButton() == MouseEvent.BUTTON1) {
      e.consume();
  } else if (e.getID() == MouseEvent.MOUSE_DRAGGED) {
      e.consume();
  } else if (e.getID() == MouseEvent.MOUSE_RELEASED && e.getButton() == MouseEvent.BUTTON1) {
    repaint();
JFrame frame = new JFrame("Panel Drag Example");
frame.getContentPane().add(new DragPanel());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(640, 480);
frame.setVisible(true);

box.setBorder(BorderFactory.createEmptyBorder(20, 0, 20, 20));
box.add(makeTitledPanel("Default", slider0));
box.add(Box.createVerticalStrut(20));
box.add(makeTitledPanel(
  "Override TrackListener#shouldScroll(...): false",  slider1));
box.add(Box.createVerticalStrut(20));
p.setBorder(BorderFactory.createTitledBorder(title));
p.add(c, BorderLayout.NORTH);
return p;
 JFrame f = new JFrame();
 f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
 f.getContentPane().add(new MainPanel().makeUI());
 f.setSize(320, 240);
 f.setLocationRelativeTo(null);
 f.setVisible(true);
});
if (e.getID() == MouseEvent.MOUSE_PRESSED && SwingUtilities.isLeftMouseButton(e)) {
 JSlider slider = (JSlider) e.getComponent();
 MouseEvent me = new MouseEvent(
  slider,
  e.getID(), e.getWhen(),
 slider.dispatchEvent(me);

private JFrame frame = new JFrame();
  Toolkit.getDefaultToolkit().addAWTEventListener(this, Long.MAX_VALUE);
  panel = new JPanel();
  panel.setBackground(Color.red);
  panel.setBorder(new LineBorder(Color.black, 1));
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  frame.add(panel);
  frame.setPreferredSize(new Dimension(300, 300));
  frame.pack();
  frame.setVisible(true);
  System.out.println(event);
  if (event instanceof MouseEvent) {
    if (event.getID() == MouseEvent.MOUSE_PRESSED) {
      Timer timer = new Timer(500, new ActionListener() {
        @Override
  frame.remove(panel);
  panel = new JPanel();
  panel.setBorder(new LineBorder(Color.black, 1));
  frame.add(panel);
  frame.validate();
  frame.repaint();
  frame.setPreferredSize(new Dimension((int) Math.random() * 50 + 300, (int) Math.random() * 50 + 300));
  frame.pack();
  System.err.println("stuff done");

typingArea.addKeyListener(this);
scrollPane.setPreferredSize(new Dimension(375, 125));
add(typingArea, BorderLayout.PAGE_START);
add(scrollPane, BorderLayout.CENTER);
add(button, BorderLayout.PAGE_END);
displayArea.setText("");
typingArea.setText("");
typingArea.requestFocusInWindow();
int id = e.getID();
if (id == KeyEvent.KEY_TYPED) {
 char c = e.getKeyChar();
JFrame.setDefaultLookAndFeelDecorated(true);
JFrame frame = new JFrame("KeyEventDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JComponent newContentPane = new KeyEventTest();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
frame.pack();
frame.setVisible(true);

content.add(new JLabel("Creature"));
JButton badger = new JButton("Badger");
badger.setName("badger");
JButton ferret = new JButton("Ferret");
ferret.setName("ferret");
JButton stoat = new JButton("Stoat");
stoat.setName("stoat");
content.add(badger);
content.add(ferret);
JButton close = new JButton(frame.getRootPane().getActionMap().get(ACTION_CLOSE));
frame.setSize(200, 150);
frame.pack();
frame.getRootPane().getActionMap().put(ACTION_CLOSE, close);
    if (event instanceof MouseEvent) {
      MouseEvent m = (MouseEvent) event;
      if (m.getID() == MouseEvent.MOUSE_CLICKED) {
        System.out.println(m.toString());

JTextArea textArea = new JTextArea("This is a working text area\n\nI LOVE SWING", 4, 0);
textArea.setCursor(Cursor.getDefaultCursor());
mainPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
mainPanel.add(new JLabel("A Normal Label"), BorderLayout.NORTH);
mainPanel.add(textArea, BorderLayout.CENTER);
mainPanel.add(new JButton("Hello World!"), BorderLayout.SOUTH);
        BufferedImage im = new BufferedImage(this.getWidth(), this.getHeight(),
            BufferedImage.TYPE_3BYTE_BGR);
        f.paint(f.getGraphics());
      MouseEvent evt = new MouseEvent(
          me.getComponent(),
          me.getID(),
          me.getWhen(),
          me.getModifiers(),
          f.getWidth() - me.getX() + f.getInsets().right - f.getInsets().left,
          f.getHeight() - me.getY() + f.getInsets().top - f.getInsets().bottom,
          me.getClickCount(),
          false,
Toolkit.getDefaultToolkit().getSystemEventQueue().push(queue);

realListeners = scrollPane.getMouseWheelListeners();
  scrollPane.removeMouseWheelListener(mwl);
scrollPane.addMouseWheelListener(this);
  e.getID(),
  e.getWhen(),
  e.getModifiers(),
    JTextArea textArea = new JTextArea(5, 20);
    JScrollPane scrollPane = new JScrollPane( textArea );
    scrollPane.setMinimumSize( scrollPane.getPreferredSize() );
    new MouseWheelToParent(scrollPane);
    panel.add(scrollPane, gbc);
JFrame frame = new JFrame("TextAreaSSCCE");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add( new JScrollPane( panel ) );
frame.setSize(400, 400);
frame.setLocationByPlatform( true );
frame.setVisible( true );

  table.addMouseListener(new MouseAdapter() {
    public void mouseClicked(MouseEvent e) {
      printDebugData(table);
  @Override
  public boolean dispatchKeyEvent(KeyEvent e) {
   if(e.getID() == KeyEvent.KEY_PRESSED)
add(scrollPane);
JFrame frame = new JFrame("SimpleTableDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
frame.pack();
frame.setVisible(true);

popup.add(new JMenu("aAaa"));
JPanel contentPane = new JPanel();
contentPane.add(popup);
JButton b = new JButton();
b.setAction(new AbstractAction("Button")
contentPane.add(b);
contentPane.addMouseListener(new MouseAdapter() {
  @Override
  public void mousePressed(MouseEvent e)
    if(me.getID() == MouseEvent.MOUSE_PRESSED)
JFrame f = new JFrame();
f.setContentPane(contentPane);
f.setSize(400, 300);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);

  menu.add(new MyMenuItem("Bananas"));
  JFrame frame = new JFrame("Testing");
  frame.setJMenuBar(mb);
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  frame.add(new TestPane());
  frame.pack();
  frame.setLocationRelativeTo(null);
  frame.setVisible(true);
if (evt.getID() == MouseEvent.MOUSE_RELEASED && contains(evt.getPoint())) {
  doClick();
  setArmed(true);

Javadoc

The root event class for all AWT events. This class and its subclasses supercede the original java.awt.Event class. Subclasses of this root AWTEvent class defined outside of the java.awt.event package should define event ID values greater than the value defined by RESERVED_ID_MAX.

The event masks defined in this class are needed by Component subclasses which are using Component.enableEvents() to select for event types not selected by registered listeners. If a listener is registered on a component, the appropriate event mask is already set internally by the component.

The masks are also used to specify to which types of events an AWTEventListener should listen. The masks are bitwise-ORed together and passed to Toolkit.addAWTEventListener.

Most used methods

getSource
getID
Returns the event type.
paramString
Returns a string representing the state of this Event. This method is intended to be used only for d
setSource
toString
Returns a String representation of this object.

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How to useAWTEvent in java.awt

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