WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5

以下是我的程序（取自headfirst Java）：

 

 1 import javax.sound.midi.*;

 2 

 3 public class MiniMiniMusicApp {

 4     public static void main(String[] args) {

 5         MiniMiniMusicApp mini = new MiniMiniMusicApp();

 6         mini.play();

 7     }

 8     public void play() {

 9         try {

10             Sequencer player = MidiSystem.getSequencer();

11             player.open();

12             

13             Sequence seq = new Sequence(Sequence.PPQ, 4);

14             

15             Track track = seq.createTrack();

16             

17             ShortMessage a = new ShortMessage();

18             a.setMessage(144, 1, 44, 100);

19             MidiEvent noteOn = new MidiEvent(a, 1);

20             track.add(noteOn);

21             

22             ShortMessage b = new ShortMessage();

23             b.setMessage(128, 1, 44, 100);

24             MidiEvent noteOff = new MidiEvent(b, 16);

25             track.add(noteOff);

26             

27             player.setSequence(seq);

28             

29             player.start();

30         } catch (Exception ex) {

31             ex.printStackTrace();

32         }

33         

34     }

35 }

 

在win8.1出现的错误信息如下：

WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0 
x80000002. Windows RegCreateKeyEx(...) returned error code 5. 

解决方法如下：

Step1：搜索并运行regedit.exe

Step2: 进入HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft，右击JavaSoft目录，选择新建->项（key），命名为Prefs

Step3: 重新编译即可。