Question

我有下一个课程，它存储了我将用于游戏的所有声音，但是我试图测试Jar文件以查看是否正常工作我从命令提示符

中找到了下一个错误

    Exception in thread "main" java.lang.NullPointerException
    at com.sun.media.sound.StandardMidiFileReader.getSequence(Unknown Source)
    at javax.sound.midi.MidiSystem.getSequence(Unknown Source)
    at com.sun.media.sound.SoftMidiAudioFileReader.getAudioInputStream(Unknown Source)
    at javax.sound.sampled.AudioSystem.getAudioInputStream(Unknown Source)
    at Assets.AudioStreaming.loadMusicAssets(AudioStreaming.java:27)
    at CrossyMain.MainMenu.<init>(MainMenu.java:64)
    at CrossyMain.Principal.main(Principal.java:18)

这是我存储所有音频资产的课程

package Assets;

import java.io.IOException;
import javax.sound.sampled.*;

public class AudioStreaming {

private static Clip mainMenu,BGM,coinP,gameOver,trainAlert,birdGO;
private static AudioInputStream in_mainMenu,in_BGM,in_coinP,in_gameOver,in_trainAlert,in_birdGO;

public static void loadMusicAssets(){

   try{ 

   /*Background*/   
   BGM = AudioSystem.getClip();
   in_BGM = AudioSystem.getAudioInputStream(AudioStreaming.class.getResource("/sound/background/NeonW.wav"));
   BGM.open(in_BGM);


   coinP = AudioSystem.getClip();
   in_coinP = AudioSystem.getAudioInputStream(AudioStreaming.class.getResource("/sound/entityFx/coinPickup.wav"));
   coinP.open(in_coinP);

   gameOver = AudioSystem.getClip();
   in_gameOver = AudioSystem.getAudioInputStream(AudioStreaming.class.getResource("/sound/entityFx/gameOver.wav"));
   gameOver.open(in_gameOver);

   trainAlert = AudioSystem.getClip();
   in_trainAlert = AudioSystem.getAudioInputStream(AudioStreaming.class.getResource("/sound/entityFx/trainWarning.wav"));
   trainAlert.open(in_trainAlert);

   birdGO = AudioSystem.getClip();
   in_birdGO = AudioSystem.getAudioInputStream(AudioStreaming.class.getResource("/sound/entityFx/eaglePickup.wav"));
   birdGO.open(in_birdGO);

   mainMenu = AudioSystem.getClip();
   in_mainMenu =  AudioSystem.getAudioInputStream(AudioStreaming.class.getResource("/sound/background/NeonValley.wav"));
   mainMenu.open(in_mainMenu);

   }catch(LineUnavailableException | UnsupportedAudioFileException | IOException e){
       e.printStackTrace();
   }
}

public static void playBGM(){
    BGM.setFramePosition(0);
    BGM.start();
}

public static void stopBGM(){
    BGM.stop();
    BGM.close();
}

public static void playMainMenu(){
    mainMenu.setFramePosition(0);
    mainMenu.start();
}

public static void stopMainMenu(){
    mainMenu.stop();
    mainMenu.close();
}

public static void playTrainWarning(){
    trainAlert.setFramePosition(0);
    trainAlert.start();
}

public static void stopTrainWarning(){
    trainAlert.stop();
    trainAlert.close();
}

public static void playBirdGO(){
    birdGO.setFramePosition(0);
    birdGO.start();
}

public static void playCoinP(){
    coinP.setFramePosition(0);
    coinP.start();
}

public static void playGameOver(){
    gameOver.setFramePosition(0);
    gameOver.start();
}





}

它在NetBeans中完美运行，没有任何错误，但是它成功编译了JAR文件，但是我注意到命令提示符出现这个错误，因为它不想通过双击打开它？有没有人遇到过这个错误？如果是这样，你是如何设法将声音资产加载到Jar文件的？任何提示/建议将非常感谢您的时间！

Jar声音加载错误NullPointerException

0 个答案: