个人原创代码：编写Java Application程序，输出1900年到2000年之间的所有润年。（闰年的判断条件：能被4整除且不能被100整除，或能被400整除）。-Personal original code: write Java Application, output all Runnian between 1900 and 2000. (Leap year judgment conditions: divisible by 4 and can not be divisible by 1