用java实现的多电梯调度程序，共有5个电梯，20层楼，运用操作系统调度思想实现的多线程模拟电梯调度。-Using java to achieve multi-elevator dispatching procedures, a total of 5 lifts, 20 floors, the use of operating systems scheduling ideas to achieve the multi-threaded simulation of elevator dispatching.
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