?? guidemo7.java
字號:
//Example 7 of Chapter 5
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class GUIDemo7 implements
MouseMotionListener , MouseListener , WindowListener
{
private JFrame f;
JTextField tf;
public static void main(String args[])
{
GUIDemo7 demo = new GUIDemo7();
demo.go();
}
public void go()
{
f = new JFrame("三個監聽器的實例");
JPanel container = new JPanel();
f.setContentPane(container);
container.setLayout(new BorderLayout());
tf = new JTextField(30);
container.add(new JLabel("單擊并拖動鼠標") , BorderLayout.NORTH);
container.add(tf , BorderLayout.SOUTH);
f.addMouseListener(this);
f.addMouseMotionListener(this);
f.addWindowListener(this);
f.setSize(240 , 150);
f.setVisible(true);
}
public void mouseClicked(MouseEvent e){ }
public void mouseEntered(MouseEvent e)
{
String s = "鼠標進來了";
tf.setText(s);
}
public void mouseExited(MouseEvent e)
{
String s = "鼠標退出了";
tf.setText(s);
}
public void mousePressed(MouseEvent e){ }
public void mouseReleased(MouseEvent e){ }
public void mouseMoved(MouseEvent e){ }
public void mouseDragged(MouseEvent e)
{
String s = "鼠標拖動 :X="+e.getX()+"Y="+e.getY();
tf.setText(s);
}
public void windowActivated(WindowEvent e){ }
public void windowClosing(WindowEvent e)
{
System.exit(1);
}
public void windowClosed(WindowEvent e){ }
public void windowDeactivated(WindowEvent e){ }
public void windowDeiconified(WindowEvent e){ }
public void windowIconified(WindowEvent e){ }
public void windowOpened(WindowEvent e){ }
}
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