| Код |
// LowLevelEvents.Java
// Наблюдение за основными низкоуровневыми событиями
import javax.swing.*;
import java.awt.event.*;
public class LowLevelEvents extends JFrame
{
LowLevelEvents()
{
super("LowLevelEvents");
// при закрытии окна - выход
setDefaultCloseOperation(EXIT_ON_CLOSE);
// добавим текстовое поле
getContentPane().add(new JTextArea());;
//и кнопку Все компоненты mouseWheelMoved(MouseWheelEvent) Все компоненты
JButton button = new JButton("Источник событий");
getContentPane().add(button, "South");
// регистрируем нашего слушателя
OurListener ol = new OurListener();
button.addkeylistener(ol);
button.addMouseListener(ol);
button.addMouseMotionListener(ol);
button.addFocusListener(ol);
// выводим окно на экран
setSize(400, 300);
setVisible(true);
}
// сюда мы будем выводить информацию
JTextArea out;
// внутренний класс - слушатель событий
class OurListener implements MouseListener, KeyListener,MouseMotionListener, MouseWheelListener, FocusListener
{
public void mousedicked (MouseEvent e) { out.append(e.toString() + "\n"); }
public void mousePressed (MouseEvent e) { out.append(e.toString() + "\n"); }
public void mouseReleased (MouseEvent e) { out.append(e.toString() + "\n"); }
public void mouseEntered (MouseEvent e) { out.append(e.toString() + "\n"); }
public void mouseExited (MouseEvent e) { out.append(e.toString() + "\n"); }
public void keyTyped (KeyEvent e) { out.append(e.toString() + "\n"); }
public void keyPressed (KeyEvent e) { out.append(e.toString() + "\n"); }
public void keyReleased (KeyEvent e) { out.append(e.toString() + "\n"); }
public void mouseDragged (MouseEvent e) { out.append(e.toString() + "\n"); }
public void mouseMdved (MouseEvent e) { out.append(e.toString() + "\n"); }
public void focusGained (FocusEvent e) { out.append(e.toString() + "\n"); }
public void focusLost (FocusEvent e) { out.append(e.toString() + "\n"); }
public void mouseWheelMoved(MouseWheelEvent e){ out.append(e.toString() + "\n"); }
}
public static void main(String[] args)
{
new LowLevelEvents();
}
}
C:\Program Files\Java\jdk1.6.0_03\bin>javac LowLevelEvents.java
LowLevelEvents.java:20: cannot find symbol
symbol : method addkeylistener(LowLevelEvents.OurListener)
location: class javax.swing.JButton
button.addkeylistener(ol);
^
LowLevelEvents.java:32: LowLevelEvents.OurListener is not abstract and does not override abstract method mouseClicked(java.awt.e
vent.MouseEvent) in java.awt.event.MouseListener
class OurListener implements MouseListener, KeyListener,MouseMotionListener, MouseWheelListener, FocusListener
^
2 errors
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