农历月天干地支算法，在线等待回答，GGJJ们帮帮忙，谢谢！！！

Question

  求农历月天干地支算法，我已经可以算出年的天干地支了，现在想要计算月的天干地支，
      但是找了好久都没找出什么规律，特来求各位高手帮忙

Answer 1

private final static String[] Gan=new String[]{"甲","乙","丙","丁","戊","己","庚","辛","壬","癸"};
private final static String[] Zhi=new String[]{"子","丑","寅","卯","辰","巳","午","未","申","酉","戌","亥"};
num为月或者日月日:(Gan[num % 10] + Zhi[num % 12])

Answer 2

http://ks.cn.yahoo.com/question/1406110725514.html