在linux或unix环境下，用Java语言编写一个龟兔竞赛的多线程程序，观察多线程的生成。-In linux or unix environment, the Java language with a tortoise and the hare and the multi-threaded process, observe the formation of multi-threaded.

操作系统相关内容。包括了java的一些简单程序和绘图程序以及SOCKET，银行家算法的实现，另外还有Linux平台的shell的实现以及多线程实现。(Operating system related content. Including the Java some simple procedures and drawing procedures, and SOCKET, bankers algorithm implementation, in addition to the Linux plat