Java Reference
In-Depth Information
28
29 buttonPanel =
new
JPanel();
30 buttonPanel.setLayout(
new
GridLayout(
4
,
3
));
31
32 //
Add digit buttons
33
34 addButton(
Ð7Ñ
);
35 addButton(
Ð8Ñ
);
36 addButton(
Ð9Ñ
);
37 addButton(
Ð4Ñ
);
38 addButton(
Ð5Ñ
);
39 addButton(
Ð6Ñ
);
40 addButton(
Ð1Ñ
);
41 addButton(
Ð2Ñ
);
42 addButton(
Ð3Ñ
);
43 addButton(
Ð0Ñ
);
44 addButton(
Ð.Ñ
);
45
46 //
Add clear entry button
47
48 clearButton =
new
JButton(
ÐCEÑ
);
49 buttonPanel.add(clearButton);
50
51
class
ClearButtonListener
implements
ActionListener
52 {
53
public void
actionPerformed(ActionEvent event)
54 {
55 display.setText(
ÐÑ
);
56 }
57 }
58 ActionListener listener =
new
ClearButtonListener();
59
60 clearButton.addActionListener(
new
61 ClearButtonListener());
62
63 add(buttonPanel,
ÐCenterÑ
);
64 }
65
66 /**
575
576
