Prentice.Hall.Introduction.to.Java.Programming,.Brief.Version.9th.(2014).[sharethefiles.com]

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14 private java.util.Calendar calendar;
15 private int month; // The specified month
16 private int year; // The specified year
17
18 // Panel jpDays to hold day names and days
19 private JPanel jpDays = new JPanel(new GridLayout(0, 7));
20
21 public CalendarPanel() {
22 // Create labels for displaying days
23 for (int i = 0; i < 49; i++) {
24 jlblDay[i] = new JLabel();
25 jlblDay[i].setBorder(new LineBorder(Color.black, 1));
26 jlblDay[i].setHorizontalAlignment(JLabel.RIGHT);
27 jlblDay[i].setVerticalAlignment(JLabel.TOP);
28 }
29
30 // Place header and calendar body in the panel
31 this.setLayout(new BorderLayout());
32 this.add(jlblHeader, BorderLayout.NORTH);
33 this.add(jpDays, BorderLayout.CENTER);
34
35 // Set current month and year
36 calendar = new GregorianCalendar();
37 month = calendar.get(Calendar.MONTH);
38 year = calendar.get(Calendar.YEAR);
39 updateCalendar();
40
41 // Show calendar
42 showHeader();
43 showDays();
44 }
45
46 /** Update the header based on locale */
47 private void showHeader() {
48 SimpleDateFormat sdf =
49 new SimpleDateFormat("MMMM yyyy", getLocale());
50 String header = sdf.format(calendar.getTime());
51 jlblHeader.setText(header);
52 }
53
54 /** Update the day names based on locale */
55 private void showDayNames() {
56 DateFormatSymbols dfs = new DateFormatSymbols(getLocale());
57 String dayNames[] = dfs.getWeekdays();
58
59 // jlblDay[0], jlblDay[1], ..., jlblDay[6] for day names
60 for (int i = 0; i < 7; i++) {
61 jlblDay[i].setText(dayNames[i + 1]);
62 jlblDay[i].setHorizontalAlignment(JLabel.CENTER);
63 jpDays.add(jlblDay[i]); // Add to jpDays
64 }
65 }
66
67 /** Display days */
68 public void showDays() {
69 jpDays.removeAll(); // Remove all labels from jpDays
70
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