Java多线程读者写者程序。程序先从txt文本中读取读者写者信息，1 R 3 5为例，1为线程序号，R表示读者，3表示申请操作的时间（秒为单位），5表示操作持续的时间。运行后先选择读者/写者优先，之后按照文本中的描述建立线程，采用信号量机制处理互斥访问。-Readers who write multi-threaded Java programs. Txt program text reads the reader to start writing Information, 1 R 3 5, for example, a number of threads, R for the reader, 3 that the applicant operating time (seconds), 5 that the duration of operation. After the first choice to run the reader/writer first, followed by the text of the descr iption of the establishment of the thread, the use of mechanisms to deal exclusive access semaphore.