According birthday computing age, before the age of 4 months to accurate

/ ** 
* calculated according to date of birth Age 
* @param BIRTHDAY 
* @return 
* / 
public static String getAgeByBirth (a Date BIRTHDAY) { 
    the StringBuffer the StringBuffer new new SB = (); 
    the try { 
        int Age = 0; 
        int month The = 0; 
        Calendar Calendar CAL = .getInstance (); 
        IF (cal.before (BIRTHDAY)) {// birth date is later than the current time, unable to calculate 
            the throw new new IllegalArgumentException ( 
                    "at The BIRTHDAY IS the before Now.It's Unbelievable!"); 
        } 
        int yearNow = cal.get (Calendar.YEAR); // current year 
        int monthNow = cal.get (Calendar.MONTH); // current month 
        int dayOfMonthNow = cal.get (Calendar.DAY_OF_MONTH); // current date
        cal.setTime (BIRTHDAY); 
        int = yearBirth cal.get (Calendar.YEAR); 
        int = monthBirth cal.get (the Calendar.MONTH); 
        int = dayOfMonthBirth cal.get (Calendar.DAY_OF_MONTH); 
        Age = yearNow - yearBirth; / / calculated age entire 
        IF (monthNow <= monthBirth) { 
            IF (monthNow == monthBirth) { 
                // IF (dayOfMonthNow <dayOfMonthBirth) Age -; // current date is before birth, age Save a 
            } the else { 
                month the monthNow = - + 12 is monthBirth; 
                Age -; // current month before the date of birth, age, a Save 
            } 
        } the else { 
            month the monthNow = - monthBirth; 
        } 

        IF (Age <. 4) { 
            IF (Age == 0) {
                sb.append(month + "个月");
            } else if (month == 0) {
                sb.append(age + "岁");
            } else {
                sb.append(age + "岁" + month + "个月");
            }
        } else {
            sb.append(age + "岁");
        }
    } catch (Exception e) {
        return "";
    }
    return sb.toString();
}

Reproduced in: https: //www.cnblogs.com/deyujincheng/p/11016433.html