Java Reference
In-Depth Information
Display 18.2
A Window Listener
(part 2 of 3)
35
public void
windowDeactivated(WindowEvent e)
36
{}
37
}
//End of inner class CheckOnExit
38
private class
ConfirmWindow
extends
JFrame
implements
ActionListener
39
{
40
public
ConfirmWindow()
Another inner class.
41
{
42
setSize(SMALL_WIDTH, SMALL_HEIGHT);
43
getContentPane().setBackground(Color.YELLOW);
44
setLayout(
new
BorderLayout());
45
JLabel confirmLabel =
new
JLabel(
46
"Are you sure you want to exit?");
add(confirmLabel,
BorderLayout.CENTER);
47
48
JPanel buttonPanel =
new
JPanel();
49
buttonPanel.setBackground(Color.ORANGE);
50
buttonPanel.setLayout(
new
FlowLayout());
51
JButton exitButton =
new
JButton("Yes");
52
exitButton.addActionListener(
this
);
53
buttonPanel.add(exitButton);
54
JButton cancelButton =
new
JButton("No");
55
cancelButton.addActionListener(
this
);
56
buttonPanel.add(cancelButton);
add(buttonPanel,
BorderLayout.SOUTH);
57
58
}
59
public void
actionPerformed(ActionEvent e)
60
{
61
String actionCommand = e.getActionCommand();
62
if
(actionCommand.equals("Yes"))
63
System.exit(0);
64
else if
(actionCommand.equals("No"))
65
dispose();
//Destroys only the ConfirmWindow.
66
else
System.out.println("Unexpected Error
in
Confirm
Window.");
67
68
}
69
}
//End of inner class ConfirmWindow
