public class TwoThreadsDemo { public static void main (String[] args) { new SimpleThread("Do it!").start(); new SimpleThread("Definitely not!").start(); } } 注意该代码极为简单:函数开始,给定一个名字(它是该线程将要打印输出的字符串)并且调用start()。然后,start()将调用run()方法。程序的结果如下所示:
0 Do it! 0 Definitely not! 1 Definitely not! 2 Definitely not! 1 Do it! 2 Do it! 3 Do it! 3 Definitely not! 4 Do it! 4 Definitely not! 5 Do it! 5 Definitely not! 6 Do it! 7 Do it! 6 Definitely not! 8 Do it! 7 Definitely not! 8 Definitely not! 9 Do it! DONE! Do it! 9 Definitely not! DONE! Definitely not! 正如你所看到的,这两个线程的输出结果纠合到一起。在一个单线程程序中,所有的"Do it!"命令将一起打印,后面跟着输出"Definitely not!"。