目前我正在做一个项目。该项目包含声音，我无法尝试播放它们。
private void playSound(){
try{
AudioInputStream audioIn = AudioSystem.getAudioInputStream(this.getClass().getResource("delta/client/gui/resources/sound/ClipOfSound.mp3"));
Clip clip = AudioSystem.getClip();
clip.open(audioIn);
clip.start();
}catch(Exception err){
err.printStackTrace();
}
}
它给了我一个 NullPointerException。路径是正确的，我已经检查了很多次。我不知道问题是什么..任何帮助都非常感谢。
堆栈跟踪：
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 delta.client.gui.main.ZButton$Button.playSound(ZButton.java:84)
at delta.client.gui.main.ZButton$Button.mousePressed(ZButton.java:62)
at java.awt.AWTEventMulticaster.mousePressed(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
第 84 行：AudioInputStream audioIn = AudioSystem.getAudioInputStream(this.getClass().getResource("delta/client/gui/resources/sound/ClipOfSound.mp3"));