Java by API/java.awt/AWTEvent

AWTEvent.MOUSE_EVENT_MASK

   <source lang="java">

// This example is from the book _Java AWT Reference_ by John Zukowski. // Written by John Zukowski. Copyright (c) 1997 O"Reilly & Associates. // You may study, use, modify, and distribute this example for any purpose. // This example is provided WITHOUT WARRANTY either expressed or import java.awt.AWTEvent; import java.awt.AWTEventMulticaster; import java.awt.ruponent; import java.awt.Frame; import java.awt.ItemSelectable; import java.awt.SystemColor; import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.awt.event.MouseEvent; class ItemEventComponent extends Component implements ItemSelectable {

 boolean selected;
 int i = 0;
 ItemListener itemListener = null;
 ItemEventComponent() {
   enableEvents(AWTEvent.MOUSE_EVENT_MASK);
 }
 public Object[] getSelectedObjects() {
   Object o[] = new Object[1];
   o[0] = new Integer(i);
   return o;
 }
 public void addItemListener(ItemListener l) {
   itemListener = AWTEventMulticaster.add(itemListener, l);
 }
 public void removeItemListener(ItemListener l) {
   itemListener = AWTEventMulticaster.remove(itemListener, l);
 }
 public void processEvent(AWTEvent e) {
   if (e.getID() == MouseEvent.MOUSE_PRESSED) {
     if (itemListener != null) {
       selected = !selected;
       i++;
       itemListener.itemStateChanged(new ItemEvent(this, ItemEvent.ITEM_STATE_CHANGED,
           getSelectedObjects(), (selected ? ItemEvent.SELECTED : ItemEvent.DESELECTED)));
     }
   }
 }

} public class MainClass extends Frame implements ItemListener {

 MainClass() {
   super("Listening In");
   ItemEventComponent c = new ItemEventComponent();
   add(c, "Center");
   c.addItemListener(this);
   c.setBackground(SystemColor.control);
   setSize(200, 200);
 }
 public void itemStateChanged(ItemEvent e) {
   Object[] o = e.getItemSelectable().getSelectedObjects();
   Integer i = (Integer) o[0];
   System.out.println(i);
 }
 public static void main(String args[]) {
   MainClass f = new MainClass();
   f.show();
 }

}

 </source>
   
  
 
  

AWTEvent.WINDOW_EVENT_MASK

   <source lang="java">
 

import java.awt.AWTEvent; import java.awt.Toolkit; import java.awt.event.AWTEventListener; import java.awt.event.ActionEvent; import java.awt.event.ruponentEvent; import java.awt.event.WindowEvent; import javax.swing.AbstractAction; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; public class Main implements AWTEventListener {

 public void eventDispatched(AWTEvent evt) {
   if (evt.getID() == WindowEvent.WINDOW_OPENED) {
     ComponentEvent cev = (ComponentEvent) evt;
     if (cev.getComponent() instanceof JFrame) {
       System.out.println("event: " + evt);
       JFrame frame = (JFrame) cev.getComponent();
       loadSettings(frame);
     }
   }
 }
 public static void loadSettings(JFrame frame) {
   System.out.println("loading");
 }
 public static void saveSettings() {
   System.out.println("saving");
 }
 public static void main(String[] args) throws Exception {
   Toolkit tk = Toolkit.getDefaultToolkit();
   final Main main = new Main();
   tk.addAWTEventListener(main, AWTEvent.WINDOW_EVENT_MASK);
   final JFrame frame = new JFrame("");
   frame.setName("your frame");
   JMenuBar mb = new JMenuBar();
   JMenu menu = new JMenu("File");
   menu.add(new AbstractAction("Quit") {
     public void actionPerformed(ActionEvent evt) {
       try {
         main.saveSettings();
         System.exit(0);
       } catch (Exception ex) {
         System.out.println(ex);
       }
     }
   });
   mb.add(menu);
   frame.setJMenuBar(mb);
   frame.pack();
   frame.setVisible(true);
 }

}

 </source>