Question

/ Finish the code to make it work

import static javafx.application.Application.launch;
import java.io.File;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ChoiceBox;
import javafx.scene.control.Label;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.media.AudioClip;
import javafx.stage.Stage;

public class JukeBox extends Application
{
private ChoiceBox<String> choice;
private AudioClip[] tunes;
private AudioClip current;
private Button playButton, stopButton;
  
//-----------------------
// presents an interface that allows the user to select and play
// a tune from a drop down box
//-----------------------
  
public void start(Stage primaryStage)

{
  
String [] names = { "Western Beats", "Classical Melody",
"Jeapordy Theme", "eightiesJam",
"New Age Rhythm", "lullaby",
"hitchcock"
};
  
  
  
// need to populate this list with the name of the songs
// that you want to use in this jukebox
// works with .wav and .mp3 file extensions
  
  
File [] audioFiles = {new File("westernBeat.wav"),
new File("classical.wav"),
new File("jeapordy.mp3"),
new File("eightiesJam.wav"),
new File("New Age Rhythm.wav"),
new File("lullaby.mp3"),
new File("hitchcock.wav")
};
  
tunes = new AudioClip[audioFiles.length];
for(int i = 0; i < audioFiles.length; i++)
{
tunes[i] = new AudioClip(audioFiles[i].toURI().toString());

}
  
current = tunes[0];
  
Label label = new Label("Select a tune: ");
  
choice = new ChoiceBox<String>();
choice.getItems().addAll(names);
choice.getSelectionModel().selectFirst();
choice.setOnAction(this::processChoice);
  
playButton = new Button("Play :) ");
stopButton = new Button("Stop :( ");
HBox buttons = new HBox(playButton, stopButton);
buttons.setSpacing(10);
buttons.setPadding(new Insets(15, 0, 0, 0));
buttons.setAlignment(Pos.CENTER);
  
playButton.setOnAction(this::processButtonPush);
stopButton.setOnAction(this::processButtonPush);
  
VBox root = new VBox(label, choice, buttons);
root.setPadding(new Insets(15, 15, 15, 25));
root.setSpacing(10);
root.setStyle("-fx-background-color: skyblue");
  
Scene scene = new Scene(root, 300, 150);
  
primaryStage.setTitle("Java Jupiter JukeBox");
primaryStage.setScene(scene);
primaryStage.show();
  
  
}
  
  
  
// -------------------------
// When a choice box selection is made3, stops current clip
// if one was playing, and sets the current tune
//--------------------------
public void processChoice(ActionEvent event)
{
current.stop();
current = tunes[choice.getSelectionModel().getSelectedIndex()];
  
}
  
//----------------------------
// handles the play and stop buttons. Stops the current clip
// in either case. If the play button was pressed. , restarts the
// current clip
//----------------------------
public void processButtonPush(ActionEvent event)
{
current.stop();
  
if(event.getSource() == playButton)
{
current.play();
}
}
  
/*
public static void main(String [] args)
{
launch(args);
}
*/
}

Answer 1

The code on Net Beans IDE using JDK8 and found two errors:

• on line[25] one should use annotation Override
• on line[63] one should not mention String inside<>.
• IMPORTANT: The files mentioned in the code should be present in the source code directory.

The compete corrected code is below:

1. import static javafx.application.Application.launch;
2. import java.io.File;
3. import javafx.application.Application;
4. import javafx.event.ActionEvent;
5. import javafx.geometry.Insets;
6. import javafx.geometry.Pos;
7. import javafx.scene.Scene;
8. import javafx.scene.control.Button;
9. import javafx.scene.control.ChoiceBox;
10. import javafx.scene.control.Label;
11. import javafx.scene.layout.HBox;
12. import javafx.scene.layout.VBox;
13. import javafx.scene.media.AudioClip;
14. import javafx.stage.Stage;
15. public class JukeBox extends Application
16. {
17. private ChoiceBox<String> choice;
18. private AudioClip[] tunes;
19. private AudioClip current;
20. private Button playButton, stopButton;
21.   
22. //-----------------------
23. // presents an interface that allows the user to select and play
24. // a tune from a drop down box
25. //-----------------------
26.   
27. @Override
28. public void start(Stage primaryStage)
29. {
30.   
31. String [] names = { "Western Beats", "Classical Melody",
32. "Jeapordy Theme", "eightiesJam",
33. "New Age Rhythm", "lullaby",
34. "hitchcock"
35. };
36.   
37.   
38.   
39. // need to populate this list with the name of the songs
40. // that you want to use in this jukebox
41. // works with .wav and .mp3 file extensions
42.   
43.   
44. File [] audioFiles = {new File("westernBeat.mp3"),
45. new File("classical.mp3"),
46. new File("jeapordy.mp3"),
47. new File("eightiesJam.mp3"),
48. new File("New Age Rhythm.mp3"),
49. new File("lullaby.mp3"),
50. new File("hitchcock.mp3")
51. };
52.   
53. tunes = new AudioClip[audioFiles.length];
54. for(int i = 0; i < audioFiles.length; i++)
55. {
56. tunes[i] = new AudioClip(audioFiles[i].toURI().toString());
57. }
58.   
59. current = tunes[0];
60.   
61. Label label = new Label("Select a tune: ");
62.   
63. choice = new ChoiceBox<>();
64. choice.getItems().addAll(names);
65. choice.getSelectionModel().selectFirst();
66. choice.setOnAction(this::processChoice);
67.   
68. playButton = new Button("Play :) ");
69. stopButton = new Button("Stop :( ");
70. HBox buttons = new HBox(playButton, stopButton);
71. buttons.setSpacing(10);
72. buttons.setPadding(new Insets(15, 0, 0, 0));
73. buttons.setAlignment(Pos.CENTER);
74.   
75. playButton.setOnAction(this::processButtonPush);
76. stopButton.setOnAction(this::processButtonPush);
77.   
78. VBox root = new VBox(label, choice, buttons);
79. root.setPadding(new Insets(15, 15, 15, 25));
80. root.setSpacing(10);
81. root.setStyle("-fx-background-color: skyblue");
82.   
83. Scene scene = new Scene(root, 300, 150);
84.   
85. primaryStage.setTitle("Java Jupiter JukeBox");
86. primaryStage.setScene(scene);
87. primaryStage.show();
88.   
89.   
90. }
91.   
92.   
93.   
94. // -------------------------
95. // When a choice box selection is made3, stops current clip
96. // if one was playing, and sets the current tune
97. //--------------------------
98. public void processChoice(ActionEvent event)
99. {
100. current.stop();
101. current = tunes[choice.getSelectionModel().getSelectedIndex()];
102.   
103. }
104.   
105. //----------------------------
106. // handles the play and stop buttons. Stops the current clip
107. // in either case. If the play button was pressed. , restarts the
108. // current clip
109. //----------------------------
110. public void processButtonPush(ActionEvent event)
111. {
112. current.stop();
113.   
114. if(event.getSource() == playButton)
115. {
116. current.play();
117. }
118. }
119.   
120. /*
121. public static void main(String [] args)
122. {
123. launch(args);
124. }
125. */
126. }

This is the output window after running it successfully:

Java Jupiter JukeBox Select a tune: Classical Melody Play : Stop :(