Java多线程问题。生产者（P）生产一个产品，消费者（C）获取一个产品；P没有生产产品之前，C不能够获取；P只能够在C获取产品之后，才能生产下一个。-Java multi-threading issues. Producer (P) production of a product, consumers (C) to obtain a product P does not produce products before, C can not access P can only obtain t

线程管理中的生产者消费者问题，主要是描述线程管理中生产者与消费者在共享资源时是否同步与互斥问题-Producers and consumers in the thread management, describes the thread management of producers and consumers, whether in the shared resource synchronization and mutual exclusion