应用Nokia UI API处理声音问题[2]

    Sound类有两个构造器
Sound(byte[] data, int type)
        
Sound(int freq, long duration)
我们主要讲述后者，通过提供给构造器或者init(int freq,long duration)方法适当的频率和持续时间来初始化声音对象，通过调用play()方法可以播放声音，调用stop方法可以停止声音的播放。关于Sound类提供的其他API请参考Nokia Ui java doc。这里给出频率参数
Freq off               0
 Ring freq A0           220
 Ring freq B0b          233
 Ring freq B0           247
 Ring freq C0           262
 Ring freq D0b          277
 Ring freq D0           294
 Ring freq E0b          311
 Ring freq E0           330
 Ring freq F0           349
 Ring freq G0b          370
 Ring freq G0           392
 Ring freq A1b          416
 Ring freq A1           440
 Ring freq B1b          466
 Ring freq B1           494
 Ring freq C1           523
 Ring freq D1b          554
 Ring freq D1           587
 Ring freq E1b          622
 Ring freq E1           659
 Ring freq F1           698
 Ring freq G1b          740
 Ring freq G1           784
 Ring freq A2b          831
 Ring freq A2           880
 Ring freq B2b          932
 Ring freq B2           988
 Ring freq C2           1047
 Ring freq D2b          1109
 Ring freq D2           1175
 Ring freq E2b          1245
 Ring freq E2           1319
 Ring freq F2           1397
 Ring freq G2b          1480
 Ring freq G2           1568
 Ring freq A3b          1661
 Ring freq A3           1760
 Ring freq B3b          1865
 Ring freq B3           1976
 Ring freq C3           2093
 Ring freq D3b          2217
 Ring freq D3           2349
 Ring freq E3b          2489
 Ring freq E3           2637
 Ring freq F3           2794
 Ring freq G3b          2960
 Ring freq G3           3136
 Ring freq A4b          3322
 Ring freq A4           3520
 Ring freq B4b          3729
 Ring freq B4           3951
 Ring freq C4           4186
 Ring freq D4b          4434
 Ring freq D4      &n