Question

我的Java项目中有两个类，一个是

反弹

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Rebound
{

   public static void main (String[] args)
   {
      JFrame frame = new JFrame ("Rebound");
      frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);

      frame.getContentPane().add(new ReboundPanel());
      frame.pack();
      frame.setVisible(true);
   }
}

，第二个是ReboundPanel

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.sound.sampled.*;
import java.io.File;
import java.io.IOException;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineEvent;
import javax.sound.sampled.LineListener;

public class ReboundPanel extends JPanel
{
   private final int WIDTH = 600, HEIGHT = 300;
   private final int DELAY = 20, IMAGE_SIZE = 35;

   private ImageIcon image1, image2, image3;
   private Timer timer;
   private int x1, y1, moveX1, moveY1, x2, y2, moveX2, moveY2, x3, y3;
   Clip clip;
   DataLine.Info info;

   public ReboundPanel() throws Exception
   {
      timer = new Timer(DELAY, new ReboundListener());
      image1 = new ImageIcon ("happyFace1.gif");
      image2 = new ImageIcon ("happyFace2.gif");


      x1 = 0;
      y1 = 100;
      x2 = 40;
      y2 = 0;
      moveX1 = moveY1 = 3;
      moveX2 = moveY2 = 5;
      setPreferredSize (new Dimension(WIDTH, HEIGHT));
      setBackground (Color.black);
      timer.start();

      image3 = new ImageIcon ("fire.gif");
      File soundFile = new File("explosion.wav");
      AudioInputStream sound = AudioSystem.getAudioInputStream(soundFile);
      DataLine.Info info = new DataLine.Info (Clip.class, sound.getFormat());
      clip = (Clip) AudioSystem.getLine(info);
      clip.open(sound);
      clip.start();
   }
   public void paintComponent (Graphics page)
   {
      super.paintComponent (page);
      image1.paintIcon (this, page, x1, y1);
      image2.paintIcon (this, page, x2, y2);
      image3.paintIcon (this, page, x2, y2);
   }
   private class ReboundListener implements ActionListener
   {

      public void actionPerformed (ActionEvent event)
      {
         x1 += moveX1;
         y1 += moveY1;
         x2 += moveX2;
         y2 += moveY2;
         if (x1 <= 0 || x1 >= WIDTH-IMAGE_SIZE)
            moveX1 = moveX1 * -1;

         if (y1 <= 0 || y1 >= HEIGHT-IMAGE_SIZE)
            moveY1 = moveY1 * -1;

         if (x2 <= 0 || x2 >= WIDTH-IMAGE_SIZE)
            moveX2 = moveX2 * -1;

         if (y2 <= 0 || y2 >= HEIGHT-IMAGE_SIZE)
            moveY2 = moveY2 * -1;

         if (Math.abs(y1-y2) <= IMAGE_SIZE-2 && Math.abs(x1-x2)<= IMAGE_SIZE-2)
            {
                moveY2 = moveY2 * -1;
                moveX2 = moveX2 * -1;
                moveY1 = moveY1 * -1;
                moveX1 = moveX1 * -1;
                x3=x2;
                y3=y2-2*IMAGE_SIZE;
                clip.loop(Clip.LOOP_CONTINUOUSLY);

            }
         if (Math.abs(y1-y2) >= 4*IMAGE_SIZE && Math.abs(x1-x2) >= 4*IMAGE_SIZE)
           {
               x3=-200;
               y3=-200;
               if (clip.isRunning()) clip.stop();
           }
         repaint();
      }
   }
}

当我尝试运行程序时，我收到以下错误

javax.sound.sampled.UnsupportedAudioFileException: could not get audio input stream from input file
    at javax.sound.sampled.AudioSystem.getAudioInputStream(AudioSystem.java:1187)
    at ReboundPanel.<init>(ReboundPanel.java:47)
    at Rebound.main(Rebound.java:21)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    at ReboundPanel$ReboundListener.actionPerformed(ReboundPanel.java:99)
    at javax.swing.Timer.fireActionPerformed(Timer.java:312)
    at javax.swing.Timer$DoPostEvent.run(Timer.java:244)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:721)
    at java.awt.EventQueue.access$200(EventQueue.java:103)
    at java.awt.EventQueue$3.run(EventQueue.java:682)
    at java.awt.EventQueue$3.run(EventQueue.java:680)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:691)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)

根据我的规范，我的目标是让两个幸福的脸在框架中移动，当它们碰撞时，声音以及火焰/爆炸的图像应该显示并消失

请帮助我向我的导师展示这个项目......

Answer 1

仅仅因为文件是WAV并不意味着JavaSound支持它。 WAV文件是容器格式，并且实际原始数据（样本）可以是不同格式，包括各种位深度的有符号/无符号PCM，或者它可以是压缩格式。我找不到JavaSound的兼容性表，但是JMF的兼容性表（这会给你一个好主意）就在这里：

http://www.oracle.com/technetwork/java/javase/formats-138492.html

解决方案是将WAV文件转换为更通用的格式，例如使用可以读取当前文件（SoX，Adacity，QuickTime，ProTools等）的转换程序的16位PCM。

更准确地说，您可能想要创建一个位深度为16位的WAV文件（小端 - 这是默认值，所以如果你看不到它不用担心），立体声或单声道应该工作。您可能还需要考虑常见的采样率，例如44,100 Hz或48,000 Hz（现在大多数计算机应支持这两种速率，但前者更常见）。

Answer 2

UnsupportedAudioFileException是一个异常，表示操作失败，因为文件不包含已识别文件类型和格式的有效数据。

如果问题是“为什么不播放样本？”答案就在上面。另一种说法是“声音使用Java Sound API无法理解的格式或编码”。

..你的问题是什么？

Java Wav文件错误（javax.sound.sampled.UnsupportedAudioFileException：无法从输入文件中获取音频输入流）

2 个答案: