|
|
| Tips ‘n’ Tricks |
| |
pb = new JProgressBar(0, 20);
pb.setValue(0);
pb.setStringPainted(true);
label = new JLabel(“Roseindia.net”);
JPanel panel = new JPanel();
panel.add(button);
panel.add(pb);
JPanel panel1 = new JPanel();
panel1.setLayout(new BorderLayout());
panel1.add(panel, BorderLayout.NORTH);
panel1.add(label, BorderLayout.CENTER);
panel1.setBorder
(BorderFactory.createEmptyBorder(20, 20,
20, 20));
frame.setContentPane(panel1);
frame.pack();
frame.setVisible(true);
frame.setDefaultCloseOperation
(JFrame.EXIT_ON_CLOSE);
//Create a timer.
timer = new Timer(interval, new
ActionListener() {
public void actionPerformed(ActionEvent
evt) {
if (i == 20){
timer.stop();
button.setEnabled(true);
pb.setValue(0);
String str = “<html>” + “<font
color=\”#FF0000\”>” + “<b>” +
“Downloading completed.” + “</b>” + “</
font>” + “</html>”;
label.setText(str);
i = i + 1;
pb.setValue(i);
}
}
);
}
class ButtonListener implements
ActionListener {
public void actionPerformed(ActionEvent
ae) {
button.setEnabled(false);
i = 0;
String str = “<html>” +
|
|
“<font color=\”#008000\”>” + “<b>” +
“Downloading is in process.......” + “</b>”
+ “</font>” +“</html>”;
label.setText(str);
timer.start();
}}
public static void main(String[] args) {
SwingTimer spb = new SwingTimer();
}}
Compile and Run:
C:\JavaJazzup>javac SwingTimer.java
C:\JavaJazzup>java SwingTimer
Output:
The output of the above program appears
as shown in the figure below.
When the start button is clicked, a string “Downloading is in process….” appears at
the bottom as in the figure below.
The above string is replaced by the string “Downloading completed.” when the task is
completed.
|
|
Sept 2007 | Java Jazz Up | 67 |
|
| |
Pages:
1,
2,
3,
4,
5,
6,
7,
8,
9,
10,
11,
12,
13,
14,
15,
16,
17,
18,
19,
20,
21,
22,
23,
24,
25,
26,
27,
28,
29,
30,
31,
32,
33,
34,
35,
36,
37,
38,
39,
40,
41,
42,
43,
44,
45,
46,
47,
48,
49,
50,
51,
52,
53 ,
54,
55,
56,
57,
58,
59,
60,
61,
62,
63 ,
64,
65 ,
66 ,
67 ,
68 ,
69 ,
70,
71,
72,
73,
74,
75,
76,
77,
78,
79, Download PDF |
|
|
|
|
|
|
| |
| |
|
