Play music in java

Playing sounds (wav files) in Java

In today’s tutorial, we’re going to show you how to play wav audio file in Java easily. Since it’s very simple, we’ll also show how to make a simple wave player.

All we’re going to need is a Music class, into which we’ll import the necessary libraries and prepare a constructor with one parameter. The parameter will be String and will indicate the path to our file. We’ll also use a MyJFrame class, which will run everything through the main() method.

First, let’s take a look at the Music class:

import java.net.MalformedURLException; import java.net.URL; import java.applet.*; public class Music < private URL file; public Music(String path) < try < file = new URL("file:" + path); > catch (MalformedURLException ex) < System.err.println(ex); > Applet.newAudioClip(file).play(); > >

And what do these imports actually do? Well the first one is used to catch MalformedURLException . The second import is for the file path and in the third package we import the applet class and its methods.

We also created a private URL attribute to which we assign the file path we get from the constructor’s parameter. Of course, everything must be inside the try block and everything will be guarded by MalformedURLException . You see, it’s pretty simple. Now, all we have to do is just to create a main class called MyJFrame , in which we’ll run everything via the main() method:

public class MyJFrame < public static void main(String args[]) < Music music = new Music("song.wav"); > >

In the MyJFrame class I used the song.wav file which can be found in the source code attached with other wav files.

The Wave player

Now, as promised, we’ll make a simple program to play wav files the user selects. First of all, we’ll rewrite the MyJFrame class completely. Remove everything you have in it and replace it with the basic layout shown below:

import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.io.*; public class MyJFrame extends JFrame < public JButton play, choose; private String file; public static MyJFrame instance; public MyJFrame() < this.setSize(400,400); this.setTitle("Wave audio player"); this.setComponents(); this.setListeners(); > public void setComponents() < >public void setListeners() < >public static Frame setup()< MyJFrame window = new MyJFrame(); window.setVisible(true); window.setLocationRelativeTo(null); return window; > public static void main(String args[]) < MyJFrame.setup(); >>

First we import the necessary packages. Then we set the size and title in the constructor and call the necessary methods. Then we create a static method of the Frame type in which the basic window properties are set. Finally, there’s the main() method, which runs it all.

Now let’s implement the setComponents() method:

Container pane = this.getContentPane(); pane.setLayout(new FlowLayout()); pane.setBackground(Color.PINK); this.choose = new JButton("choose"); this.play = new JButton("play"); pane.add(choose); pane.add(play);

The method does nothing extraordinary. We save the panel to the container, set the FlowLayout to it and add two buttons. The form should look like this:

Now it’s the time for the setListeners() method, which is going to be a little more interesting:

this.choose.addActionListener(new ActionListener() < public void actionPerformed(ActionEvent e)< FileDialog fd = new FileDialog(instance); fd.setMode(FileDialog.LOAD); fd.setVisible(true); // makes the window visible String newFile = fd.getDirectory() + fd.getFile(); // returns the folder path + the file path if (newFile != null) < file = newFile; >> >); this.play.addActionListener(new ActionListener() < public void actionPerformed(ActionEvent e) < Music m = new Music(file); // file = absolute path to the file retrieved from the file variable > >);

In the method, we set action listeners for the choose and play buttons. Once the choose button is pressed a FileDialog box will pop up.

There we can select a file thanks to the property set by fd.setMode(FileDialog.LOAD) . Then we save the file path to the file variable. We let our file variable refer to the newFile variable.

Once we press the play button, an instance of the Music class is created and the file is played. So the file is completely done.

Here is the whole MyJFrame class as it should look like now:

import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.io.*; public class MyJFrame extends JFrame < public JButton play, choose; private String file; public static MyJFrame instance; public MyJFrame() < this.setSize(400, 400); this.setTitle("Wave audio player"); this.setComponents(); this.setListeners(); > public void setComponents() < Container pane = this.getContentPane(); pane.setLayout(new FlowLayout()); pane.setBackground(Color.PINK); this.choose = new JButton("choose"); this.play = new JButton("play"); pane.add(choose); pane.add(play); > public void setListeners() < this.choose.addActionListener(new ActionListener() < public void actionPerformed(ActionEvent e) < FileDialog fd = new FileDialog(instance); fd.setMode(FileDialog.LOAD); fd.setVisible(true); String soubor = fd.getDirectory() + fd.getFile(); if (soubor != null) < file = soubor; >> >); this.play.addActionListener(new ActionListener() < public void actionPerformed(ActionEvent e) < Music m = new Music(file); > >); > public static Frame setup() < MyJFrame window = new MyJFrame(); window.setVisible(true); window.setLocationRelativeTo(null); return window; > public static void main(String args[]) < MyJFrame.setup(); >>

If anyone still wouldn’t understand any part of the code, then download the file attached to this article, where you will find wav files to play.

Download

Downloaded 36x (16.69 MB)
Application includes source codes in language Java

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Воспроизведение звука в Java

Нормальной русскоязычной информации по теме просто нет. Java-tutorials тоже оставляют желать лучшего. А архитектура javax.sound.sampled хоть и проста, но далеко не тривиальна. Поэтому свой первый пост на Хабре я решил посвятить именно этой теме. Приступим:

Воспроизведение звука

try < File soundFile = new File("snd.wav"); //Звуковой файл //Получаем AudioInputStream //Вот тут могут полететь IOException и UnsupportedAudioFileException AudioInputStream ais = AudioSystem.getAudioInputStream(soundFile); //Получаем реализацию интерфейса Clip //Может выкинуть LineUnavailableException Clip clip = AudioSystem.getClip(); //Загружаем наш звуковой поток в Clip //Может выкинуть IOException и LineUnavailableException clip.open(ais); clip.setFramePosition(0); //устанавливаем указатель на старт clip.start(); //Поехали. //Если не запущено других потоков, то стоит подождать, пока клип не закончится //В GUI-приложениях следующие 3 строчки не понадобятся Thread.sleep(clip.getMicrosecondLength()/1000); clip.stop(); //Останавливаем clip.close(); //Закрываем >catch (IOException | UnsupportedAudioFileException | LineUnavailableException exc) < exc.printStackTrace(); >catch (InterruptedException exc) <> 

Регулятор громкости

Поигравшись со звуками, вы наверняка захотите иметь возможность программно изменять громкость звука. Java Sound API предоставляет такую возможность с фирменной кривотой.

//Получаем контроллер громкости FloatControl vc = (FloatControl) clip.getControl(FloatControl.Type.MASTER_GAIN); //Устанавливаем значение //Оно должно быть в пределах от vc.getMinimum() до vc.getMaximum() vc.setValue(5); //Громче обычного 

Этот код нужно поместить между строчками clip.open(ais) и clip.setFramePosition(0).

Упрощаем процесс

import java.io.File; import java.io.IOException; import javax.sound.sampled.AudioInputStream; import javax.sound.sampled.AudioSystem; import javax.sound.sampled.Clip; import javax.sound.sampled.FloatControl; import javax.sound.sampled.LineEvent; import javax.sound.sampled.LineListener; import javax.sound.sampled.LineUnavailableException; import javax.sound.sampled.UnsupportedAudioFileException; public class Sound implements AutoCloseable < private boolean released = false; private AudioInputStream stream = null; private Clip clip = null; private FloatControl volumeControl = null; private boolean playing = false; public Sound(File f) < try < stream = AudioSystem.getAudioInputStream(f); clip = AudioSystem.getClip(); clip.open(stream); clip.addLineListener(new Listener()); volumeControl = (FloatControl) clip.getControl(FloatControl.Type.MASTER_GAIN); released = true; >catch (IOException | UnsupportedAudioFileException | LineUnavailableException exc) < exc.printStackTrace(); released = false; close(); >> // true если звук успешно загружен, false если произошла ошибка public boolean isReleased() < return released; >// проигрывается ли звук в данный момент public boolean isPlaying() < return playing; >// Запуск /* breakOld определяет поведение, если звук уже играется Если breakOld==true, о звук будет прерван и запущен заново Иначе ничего не произойдёт */ public void play(boolean breakOld) < if (released) < if (breakOld) < clip.stop(); clip.setFramePosition(0); clip.start(); playing = true; >else if (!isPlaying()) < clip.setFramePosition(0); clip.start(); playing = true; >> > // То же самое, что и play(true) public void play() < play(true); >// Останавливает воспроизведение public void stop() < if (playing) < clip.stop(); >> public void close() < if (clip != null) clip.close(); if (stream != null) try < stream.close(); >catch (IOException exc) < exc.printStackTrace(); >> // Установка громкости /* x долже быть в пределах от 0 до 1 (от самого тихого к самому громкому) */ public void setVolume(float x) < if (x<0) x = 0; if (x>1) x = 1; float min = volumeControl.getMinimum(); float max = volumeControl.getMaximum(); volumeControl.setValue((max-min)*x+min); > // Возвращает текущую громкость (число от 0 до 1) public float getVolume() < float v = volumeControl.getValue(); float min = volumeControl.getMinimum(); float max = volumeControl.getMaximum(); return (v-min)/(max-min); >// Дожидается окончания проигрывания звука public void join() < if (!released) return; synchronized(clip) < try < while (playing) clip.wait(); >catch (InterruptedException exc) <> > > // Статический метод, для удобства public static Sound playSound(String path) < File f = new File(path); Sound snd = new Sound(f); snd.play(); return snd; >private class Listener implements LineListener < public void update(LineEvent ev) < if (ev.getType() == LineEvent.Type.STOP) < playing = false; synchronized(clip) < clip.notify(); >> > > > 

Пользоваться очень просто, например:

Sound.playSound("sounds/hello.wav").join(); 

Форматы

Пару слов о поддержке форматов звуковых файлов: забудьте про mp3 и вспомните wav. Также поддерживаются au и aif.

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How to Play Mp3 File in Java Tutorial | Simple Steps

Hello friends, welcome to my other tutorial, and in this tutorial, you will learn about How to Play Mp3 File in Java . Most of us like to listen to music, and nothing could be more pleasing to us if we can make and customize our Music player. By going through this article, you will get to know how you can play an mp3 file in Java and also you will create a simple music player.

I am going to use Intellij IDEA IDE for the programming development, but you are free to use any IDE like NetBeans or Eclipse. In any case, if you want to download the source code of the program, then the link of the file is given at the end of the tutorial.

So let’s start our tutorial How to Play Mp3 File in Java and learn step by step.

How to Play Mp3 File in Java

Downloading jlayer Jar File

• To play any mp3 file in java, you need to download a jar file called jlayer and add it to your java project.
• To download the jlayer jar file, you can simply click on the link given below.

• After downloading the jlayer jar file, the next thing you have to do is to add it to your project.

Adding jlayer Jar File to Our Project

• Create a new Java project in your IDE and give it a name. You can use any IDE like NetBeans, Eclipse or IntelliJ IDEA to create your Java project.
• For NetBeans users,
  • Right click on the Libraries folder then select Add JAR/Folder and then you can add the JAR file to your project.
  • Right click on the Project then select Properties —>>>>Java Build Path and then you can choose Add External JARs button to add the JAR file.
  • Go to File––>>>>Project Structure—>>>>Libraries then click on the “+” sign and select Java and then you can add the JAR file.

  Preparing Display for Our Music Player

  • Create a class(MusicPlayer in this example).
  • Now create an object of the JFrame class and set some of its properties like its Title, Background color, its Layout, its Size and Location and its Default Close Operation.
  • Now create an object of five JButtons(Select Mp3, Play, Pause, Resume and Stop) and one JLabel( songNameLabel).
  • Now you have to set the size and location of JButtons and JLabel using the setBounds() method and then finally you have to add them to the JFrame using the add() method.
  • Program is given below.

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