使用javax.sound.sampled.Clip在游戏中播放,循环和停止多个声音.意外错误
作者:互联网
我正试图在游戏中同时播放两个wav声音(背景音乐和效果).我首先使用java中的另一个音频处理程序构建了这段代码,它将处理声音的播放,停止和循环.此构造将播放背景音乐或效果,但一次只能播放一个.我环顾互联网并被告知使用javax.sound.sampled.Clip处理声音,因此重复使用相同的构造(播放,停止,循环),但将其切换为使用javax.sound.sampled.Clip.现在我完全迷失了.从我到目前为止所读到的,我已经完成了所有正确的操作并且在eclipse编辑器中没有出现任何错误,但是当我运行它时,我得到了两个错误之一.在eclipse(在Linux上运行)中抛出LineUnavailableException.在eclipse(在Windows 7上运行)中,我在此代码的loop()部分中获得了java.lang.NullPointerException.如果你能告诉我我做错了什么或者给我一些相关文档,我会很感激.我假设我的代码处理异常,但我不确定.如果你看到任何其他可怕的代码失误,请让我知道我正在努力成为最好的程序员,我真的很感激建设性的批评.感谢您的时间.
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;
/**
* Handles play, pause, and looping of sounds for the game.
* @author Tyler Thomas
*
*/
public class Sound {
private Clip myClip;
public Sound(String fileName) {
try {
File file = new File(fileName);
if (file.exists()) {
Clip myClip = AudioSystem.getClip();
AudioInputStream ais = AudioSystem.getAudioInputStream(file.toURI().toURL());
myClip.open(ais);
}
else {
throw new RuntimeException("Sound: file not found: " + fileName);
}
}
catch (MalformedURLException e) {
throw new RuntimeException("Sound: Malformed URL: " + e);
}
catch (UnsupportedAudioFileException e) {
throw new RuntimeException("Sound: Unsupported Audio File: " + e);
}
catch (IOException e) {
throw new RuntimeException("Sound: Input/Output Error: " + e);
}
catch (LineUnavailableException e) {
throw new RuntimeException("Sound: Line Unavailable: " + e);
}
}
public void play(){
myClip.setFramePosition(0); // Must always rewind!
myClip.loop(0);
myClip.start();
}
public void loop(){
myClip.loop(Clip.LOOP_CONTINUOUSLY);
}
public void stop(){
myClip.stop();
}
}
解决方法:
我能够使代码工作,现在可以更好地理解Clips.帮助我最多的页面是http://www3.ntu.edu.sg/home/ehchua/programming/java/J8c_PlayingSound.html它打破了一切,帮助我看到我犯错的地方.这是我最后的工作代码.和以前一样,如果你看到任何可怕的错误或逻辑或风格的景点让我知道.
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;
/**
* Handles playing, stoping, and looping of sounds for the game.
* @author Tyler Thomas
*
*/
public class Sound {
private Clip clip;
public Sound(String fileName) {
// specify the sound to play
// (assuming the sound can be played by the audio system)
// from a wave File
try {
File file = new File(fileName);
if (file.exists()) {
AudioInputStream sound = AudioSystem.getAudioInputStream(file);
// load the sound into memory (a Clip)
clip = AudioSystem.getClip();
clip.open(sound);
}
else {
throw new RuntimeException("Sound: file not found: " + fileName);
}
}
catch (MalformedURLException e) {
e.printStackTrace();
throw new RuntimeException("Sound: Malformed URL: " + e);
}
catch (UnsupportedAudioFileException e) {
e.printStackTrace();
throw new RuntimeException("Sound: Unsupported Audio File: " + e);
}
catch (IOException e) {
e.printStackTrace();
throw new RuntimeException("Sound: Input/Output Error: " + e);
}
catch (LineUnavailableException e) {
e.printStackTrace();
throw new RuntimeException("Sound: Line Unavailable Exception Error: " + e);
}
// play, stop, loop the sound clip
}
public void play(){
clip.setFramePosition(0); // Must always rewind!
clip.start();
}
public void loop(){
clip.loop(Clip.LOOP_CONTINUOUSLY);
}
public void stop(){
clip.stop();
}
}
标签:game-development,java,exception,audio 来源: https://codeday.me/bug/20190928/1828097.html