这是一个经典的动态页面JAVA程序。在每一次定时器滴答，就可以生成随机圆并把屏幕下移一个像素，效果如同降雨。-This is a classic dynamic pages JAVA procedures. Every time the timer tick, it can generate random yen and a lower pixel screen, the effect as rainfall.

输入12个月的降水量，输出这12个月的平均降雨量，并且输出每个月的降雨量与平均降雨量之间的差值 * 并且按照降雨量的多少由多到少排序，并且输出排序之后的结果-Enter the 12-month precipitation, the output of the 12-month average rainfall, and the output of the monthly rainfall and average rainfall is the difference between* an

雨量监测的增删改查，使用jdbc完成的功能实现-Rainfall monitoring additions and deletions search, use jdbc complete the function

利用collection计算平均降雨量和在Java文件中搜索关键字(Using collection to calculate average rainfall and search keywords in Java files)