需求描述：

　　南水北调工程东线江苏江阴至山东济宁之间，地势北高南低，沿途需要建立一系列大型抽水泵站进行梯级抽水。通常每两个泵站之间需要建设一座水库作为中转。低处泵站将水抽到中转水库，再由高处泵站向更高的中转水库抽水。设有泵站A，B和中转水库C，泵站设有一定数量的抽水机，水库有一定容量，当水位高于允许最高水位，禁止低处泵站注水；当水位低于允许最低水位，禁止高处泵站抽水。

请用面向对象方法设计一个仿真程序，要求：

1，　　两座泵站在随机时间，以随机时间长度，随机台抽水机抽水或注水

2，　　水库根据自身容量允许或禁止泵站抽水，以保证自身处于安全水位。

3，　　泵站即使在允许抽水/注水条件下，依然可以根据自身状态（如高/低处水库水位情况）选择抽水/注水，由于只考虑两个泵站一个水库，此功能可由随机数实现。



刚学java,写的比较业余,请高手指点!-demand Descr iption : South-East Jiangyin, Jiangsu and Shandong Jining between North South topography low, along the need to establish a series of major steps Pumping Station for pumping. Usually, two pumping stations between the need to build a reservoir as a relay station. Low water pumping station will be able to get into the interim reservoirs, pumping stations by the height of the transit to a higher reservoir pumping. Pumping Station with A, B and C interim reservoir and pumping stations with a certain number of pumps, reservoirs have a certain capacity, When the water level higher than the maximum permitted level, prohibiting a low water injection pump station; When the water level below the allowed minimum level, Prohibition height pumping station pumping. Please use the object-orie