编写一个Java应用程序，在主线程中再创建2个线程，要求线程经历4种状态：新建、运行、中断、死亡。（例如，可以创建兔子和乌龟两个线程，兔子跑到中途要睡一会。）-Write a Java application, in the main thread and then creates two threads require a thread through four kinds of states: new, run, break and die. (For example, you can create a hare and the tortoise two threads, the rabbit ran halfway to sleep for a while.)