1. 理解多线程、掌握线程的创建、启动、运行等方法，能够编写多线程类。

2. 能编写龟兔赛跑多线程应用程序。

-1. To understand multi-threaded, master thread to create, start, run and so on, to write multi-threaded class. 2. Can write multithreaded applications Tortoise and the Hare.