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

43 panel3.add(panel1, BorderLayout.WEST);
44 panel3.add(panel2, BorderLayout.CENTER);
45
46 setLayout(new BorderLayout());
47 add(panel3, BorderLayout.NORTH);
48 add(clock, BorderLayout.CENTER);
49
50 jcbLocales.addActionListener(new ActionListener() {
51 @Override
52 public void actionPerformed(ActionEvent e) {
53 clock.setLocale(
54 availableLocales[jcbLocales.getSelectedIndex()]);
55 }
56 });
57 jcbTimeZones.addActionListener(new ActionListener() {
58 @Override
59 public void actionPerformed(ActionEvent e) {
60 clock.setTimeZone(TimeZone.getTimeZone(
61 availableTimeZones[jcbTimeZones.getSelectedIndex()]));
62 }
63 });
64 }
65
66 private void setAvailableLocales() {
67 for (int i = 0; i < availableLocales.length; i++) {
68 jcbLocales.addItem(availableLocales[i].getDisplayName() + " "
69 + availableLocales[i].toString());
70 }
71 }
72
73 private void setAvailableTimeZones() {
74 // Sort time zones
75 Arrays.sort(availableTimeZones);
76 for (int i = 0; i < availableTimeZones.length; i++) {
77 jcbTimeZones.addItem(availableTimeZones[i]);
78 }
79 }
80 }
Listing 35.3 WorldClockApp.java
1 import javax.swing.*;
2
3 public class WorldClockApp extends JApplet {
4 /** Construct the applet */
5 public WorldClockApp() {
6 add(new WorldClockControl());
7 }
8 }
The WorldClock class uses GregorianCalendar to obtain a Calendar object for
the specified locale and time zone (line 28). Since WorldClock extends JPanel,
and every GUI component has the locale property, the locale for the calendar
is obtained from the WorldClock using getLocale() (line 28).
10