如何用Java写一个原生wav播放器

发布网友发布时间：2022-04-22 21:44

共1个回答

热心网友时间：2022-04-22 23:14

MusicPlayer.java
[java] view plain copy
package musicplayer;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.WindowConstants;

/**
*
* @author Chandler
*/
public class MusicPlayer extends JFrame{

private Container container;
private JButton playbutton;
private PlayBackThread playbackthread;
//默认构造函数
public MusicPlayer(String title){
super(title);
container = this.getContentPane();
playbutton = new JButton("播放");
playbutton.setSize(50,20);
playbutton.addActionListener(new PlayActionListener());
this.setLayout(new BorderLayout());
this.setSize(500,400);
container.add(playbutton,BorderLayout.CENTER);
Toolkit toolkit = Toolkit.getDefaultToolkit();
int x = (int)(toolkit.getScreenSize().getWidth()-this.getWidth())/2;
int y = (int)(toolkit.getScreenSize().getHeight()-this.getHeight())/2;
this.setLocation(x,y);
this.setVisible(true);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}

/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
MusicPlayer musicplayer = new MusicPlayer("MusicPlayer");
}
class PlayActionListener implements ActionListener{

@Override
public void actionPerformed(ActionEvent e) {
System.out.println(e.getActionCommand());
playbackthread = new PlayBackThread();
playbackthread.start();
}
}
}
PlayBackThread.java

[java] view plain copy
package musicplayer;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.LineUnavailableException;

import java.io.RandomAccessFile;

import java.util.Scanner;

/**
*
* @author Chandler
*/
public class PlayBackThread extends Thread{
private SourceDataLine dataline;
private final int dataOffset = 0x2e;
public PlayBackThread(){
super("playbackthread");
}

@Override
public void run(){
try{
RandomAccessFile raf = new RandomAccessFile("C:\\Users\\Chandler\\Documents\\NetBeansProjects\\MusicPlayer\\src\\musicplayer\\John Denver - Country Roads.wav","r");
AudioFormat af;
af = new AudioFormat(44100,16,2,true,false);
dataline = (SourceDataLine)AudioSystem.getSourceDataLine(af);
dataline.open(af);
raf.seek(dataOffset);
int hasRead=0;
dataline.start();
byte[] buff=new byte[4096];
Scanner input = new Scanner(System.in);
while((hasRead=raf.read(buff))>0){
// print(raf.getFilePointer(),buff);
dataline.write(buff, 0, hasRead);
}
dataline.stop();
} catch(Exception e){
e.printStackTrace();
}
}
public static void print(long pointer, byte[] buff){
System.out.format("%x: " ,pointer);
System.out.format("%x ", buff[0]);
System.out.format("%x ", buff[1]);
System.out.format("%x ", buff[2]);
System.out.format("%x ", buff[3]);

System.out.println();
}
}