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

696 Chapter 18 Applets and Multimedia
register listener
start audio
register listener
stop audio
register listener
select a nation
present a nation
play a clip
stop audio clip
main method omitted
29 panel.add(jbtResume);
30 panel.add(jbtSuspend);
31 panel.add(new JLabel("Select"));
32 panel.add(jcboNations);
33 add(jlblImageLabel, BorderLayout.CENTER);
34 add(panel, BorderLayout.SOUTH);
35
36 jbtResume.addActionListener(new ActionListener() {
37 @Override
38 public void actionPerformed(ActionEvent e) {
39
40
start();
}
41 });
42 jbtSuspend.addActionListener(new ActionListener() {
43 @Override
44 public void actionPerformed(ActionEvent e) {
45
46
stop();
}
47 });
48 jcboNations.addActionListener(new ActionListener() {
49 @Override
50 public void actionPerformed(ActionEvent e) {
51 stop();
52 current = jcboNations.getSelectedIndex();
53 presentNation(current);
54 }
55 });
56
57 jlblImageLabel.setIcon(icons[0]);
58 jlblImageLabel.setHorizontalAlignment(JLabel.CENTER);
59
60
currentAudioClip = audioClips[0];
currentAudioClip.play();
61 }
62
63 private void presentNation(int index) {
64 jlblImageLabel.setIcon(icons[index]);
65 jcboNations.setSelectedIndex(index);
66 currentAudioClip = audioClips[index];
67
68
currentAudioClip.play();
}
69
70 @Override
71 public void start() {
72
73
currentAudioClip.play();
}
74
75 @Override
76 public void stop() {
77
78
currentAudioClip.stop();
}
79 }
A label is created in line 13 to display a flag image. An array of flag images for seven nations
is created in lines 22–23. An array of audio clips is created in lines 24–25. The image files and
audio files are stored in the same directory as the applet class file so these files can be located
using the getResource method.
The combo box for country names is created in lines 16–17. When a new country name in
the combo box is selected, the current presentation is stopped and a new selected nation is
presented (lines 51–53).