java通过月日判断星座

根据月日判断星座：

/**
    * 根据月日判断星座   
    * @param month
    * @param day
    * @return int
    */
   public static String getConstellation(int m,int d){
	   
	  
       final String[] constellationArr = {"魔羯座" ,"水瓶座", "双鱼座", "牡羊座", "金牛座", "双子座", "巨蟹座", "狮子座", "处女座", "天秤座","天蝎座", "射手座", "魔羯座" }; 
	   
	   final int[] constellationEdgeDay = { 20,18,20,20,20,21,22,22,22,22,21,21};
	   int month=m;   
	   int day =d;   
       if (day <= constellationEdgeDay[month-1]) {   
          month = month - 1;   
       }   
       if (month >= 0) {   
           return constellationArr[month];   
       }   
	       //default to return 魔羯   
    return constellationArr[11];   

   }