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Wednesday, 28 December 2016

Chapter 16 Exercise 22, Introduction to Java Programming, Tenth Edition Y. Daniel LiangY.

16.22 (Play, loop, and stop a sound clip) Write a program that meets the following requirements:
■ Get an audio file from the class directory using AudioClip.
■ Place three buttons labeled Play, Loop, and Stop, as shown in Figure 16.46a.
■ If you click the Play button, the audio file is played once. If you click the
Loop button, the audio file keeps playing repeatedly.
If you click the Stop button, the playing stops.


import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.HBox;
import javafx.scene.media.AudioClip;
import javafx.stage.Stage;

public class Exercise_22 extends Application {

    final String URI = "file:/home/ghosthenry/us.mp3";

    @Override
    public void start(Stage primaryStage) throws Exception {

        AudioClip audioClip = new AudioClip(URI);

        Button btPlay = new Button("Play");
        btPlay.setOnAction(e-> {
            if (audioClip.isPlaying()) {
                audioClip.stop();
            }
            audioClip.setCycleCount(1);
            audioClip.play();
        });
        Button btLoop = new Button("Loop");
        btLoop.setOnAction(e-> {
            if (audioClip.isPlaying()) {
                audioClip.stop();
            }
            audioClip.setCycleCount(AudioClip.INDEFINITE);
            audioClip.play();
        });
        Button btStop = new Button("Stop");
        btStop.setOnAction(e -> audioClip.stop());
        HBox hBox = new HBox(btPlay, btLoop, btStop);
        hBox.setSpacing(10);
        hBox.setPadding(new Insets(10));

        primaryStage.setScene(new Scene(hBox));
        primaryStage.setTitle("Play audio");
        primaryStage.show();
    }

    public static void main(String[] args) {
        Application.launch(args);
    }
}

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