模拟实现一个多功能电子设备，它既能播放mp3歌曲，同时还能够借助播放器的界面来监测脉动。-Analog realization of a multifunctional electronic device that can not only play mp3 songs, while also using the player interface to monitor the pulse.

java时钟，有监听事件，时间计数器，每一秒触发一次，绘制图形-java clock, there are monitor events, time counter, every second the trigger once, drawing graphics