In Listing 1, which code sets the initial image icon and which code plays the audio?LISTIN...

In Listing 1, which code sets the initial image icon and which code plays the audio?

LISTING 1 FlagAnthem.java

1 import javafx.application.Application;
2 import javafx.collections.FXCollections;
3 import javafx.collections.ObservableList;
4 import javafx.stage.Stage;
5 import javafx.geometry.Pos;
6 import javafx.scene.Scene;
7 import javafx.scene.control.Button;
8 import javafx.scene.control.ComboBox;
9 import javafx.scene.control.Label;
10 import javafx.scene.image.Image;
11 import javafx.scene.image.ImageView;
12 import javafx.scene.layout.BorderPane;
13 import javafx.scene.layout.HBox;
14 import javafx.scene.media.Media;
15 import javafx.scene.media.MediaPlayer;
16
17 public class FlagAnthem extends Application {
18 private final static int NUMBER_OF_NATIONS = 7;
19 private final static String URLBase =
20 "http://cs.armstrong.edu/liang/common";
21 private int currentIndex = 0;
22
23 @Override // Override the start method in the Application class
24 public void start(Stage primaryStage) {
25 Image[] images = new Image[NUMBER_OF_NATIONS];
26 MediaPlayer[] mp = new MediaPlayer[NUMBER_OF_NATIONS];
27
28 // Load images and audio
29 for (int i = 0; i
30 images[i] = new Image(URLBase + "/image/flag" + i + ".gif");
31 mp[i] = new MediaPlayer(new Media(
32 URLBase + "/audio/anthem/anthem" + i + ".mp3"));
33 }
34
35 Button btPlayPause = new Button(">");
36 btPlayPause.setOnAction(e -> {
37 if (btPlayPause.getText().equals(">")) {
38 btPlayPause.setText("||");
39 mp[currentIndex].pause();
40 } else {
41 btPlayPause.setText(">");
42 mp[currentIndex].play();
43 }
44 });
45
46 ImageView imageView = new ImageView(images[currentIndex]);
47 ComboBox cboNation = new ComboBox<>();
48 ObservableList items = FXCollections.observableArrayList
49 ("Denmark", "Germany", "China", "India", "Norway", "UK", "US");
50 cboNation.getItems().addAll(items);
51 cboNation.setValue(items.get(0));
52 cboNation.setOnAction(e -> {
53 mp[currentIndex].stop();
54 currentIndex = items.indexOf(cboNation.getValue());
55 imageView.setImage(images[currentIndex]);
56 mp[currentIndex].play();
57 });
58
59 HBox hBox = new HBox(10);
60 hBox.getChildren().addAll(btPlayPause,
61 new Label("Select a nation: "), cboNation);
62 hBox.setAlignment(Pos.CENTER);
63
64 // Create a pane to hold nodes
65 BorderPane pane = new BorderPane();
66 pane.setCenter(imageView);
67 pane.setBottom(hBox);
68
69 // Create a scene and place it in the stage
70 Scene scene = new Scene(pane, 350, 270);
71 primaryStage.setTitle("FlagAnthem"); // Set the stage title
72 primaryStage.setScene(scene); // Place the scene in the stage
73 primaryStage.show(); // Display the stage
74 }
75 }