java_wait_notify_notifyall

说明：  java 多线程编程，演示了线程等待，唤醒。可以达到并行计算。利用著名操作系统的生产者与消费者说了原理。
(java multithreaded programming that demonstrates thread waiting, wake up. Parallel computing can be achieved. Using well-known operating system that the principle of producers and consumers.)