Java SQL Date toAge(String birthDay)

Description

to Age

License

Open Source License

Declaration

public static String toAge(String birthDay) 

Method Source Code

//package com.java2s;
import java.sql.Date;
import java.sql.Time;

import java.text.*;
import java.util.Calendar;

public class Main {
    public static final String DEFAULT_DATE_YMD_FORMAT = "yyyy-MM-dd";
    public static final String DEFAULT_TIME_FORMAT = "HH:mm:ss";

    public static String toAge(String birthDay) {

        if (birthDay == null || birthDay.length() != 8) {
            return null;
        }/* w w w  .  j  a  v  a 2 s  . c om*/

        int birthYear = Integer.parseInt(birthDay.substring(0, 4));
        int birthMonth = Integer.parseInt(birthDay.substring(4, 6));
        int birthDayOfMonth = Integer.parseInt(birthDay.substring(6, 8));
        return toAge(birthYear, birthMonth, birthDayOfMonth);
    }

    public static String toAge(int birthYear, int birthMonth, int birthDayOfMonth) {

        Calendar cl = Calendar.getInstance();
        int year = cl.get(Calendar.YEAR);
        int month = cl.get(Calendar.MONTH) + 1;
        int day = cl.get(Calendar.DAY_OF_MONTH);

        int sa = 0;

        if (month > birthMonth) {
            sa = 0;
        } else if (month == birthMonth && day >= birthDayOfMonth) {
            sa = 0;
        } else {
            sa = 1;
        }

        int age = year - birthYear - sa;

        return Integer.toString(age);
    }

    public static String toString(Date date) {
        return toString((java.util.Date) date);
    }

    public static String toString(java.util.Date date) {
        return toString(date, DEFAULT_DATE_YMD_FORMAT);
    }

    public static String toString(Date date, String format) {
        return toString((java.util.Date) date, format);
    }

    public static String toString(java.util.Date date, String format) {

        if (date == null) {
            return null;
        }

        if (format == null) {
            throw new IllegalArgumentException("The value of an argument is inaccurate.");
        }

        SimpleDateFormat sdf = new SimpleDateFormat(format);

        return sdf.format(date);
    }

    public static String toString(Time time, String format) {

        if (time == null) {
            return null;
        }

        if (format == null) {
            throw new IllegalArgumentException("The value of an argument is inaccurate.");
        }

        SimpleDateFormat sdf = new SimpleDateFormat(format);

        return sdf.format(time);
    }

    public static String toString(Time time) {
        return toString(time, DEFAULT_TIME_FORMAT);
    }
}

Related

1. now()
2. nowPlus(int parts, int value)
3. parseStringValue(Class returnType, String value)
4. serialize(Instant sourceValue)
5. stringToMillis(String str)
6. today()
7. today()
8. today()
9. todaySQL()