在使用声音文件的时候，特地引用了一个媒体文件，是JDK本身没有的，程序不安装JMF是无法听到声音的。之后，在线程应用上，建立两个相应的线程就可以完成任务了。在效果上能够让人感觉到是同步进行，但应当实际理解为程序的运行是线性的，在单CPU上是不可能出现并行的。-At a time when the use of sound files, specifically citing a media file, the JDK does not, the program not to install JMF can not hear the sound. After-threaded applications, the establishment of two corresponding thread to complete the task. In effect to make people feel that is the same time, but it should be understood as the actual operation of the procedure is linear, in a single CPU is not in parallel.