一个简单的多线程运行的程序，能够看到所有线程同时打开的效果，和只打开一个线程的效果，还可以对某些线程进行暂停，继续等操作。-A simple multi-threaded operating procedures, be able to see the effect of all the threads open, and only the effect of opening a thread, the thread can be suspended for some to continue s