Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.util.Calendar;
import java.util.Date;

public class Main {

    public static int getUserAge(Date birthDay) {
        Calendar cal = Calendar.getInstance();

        if (cal.before(birthDay)) {
            return 0;
        }
        int yearNow = cal.get(Calendar.YEAR);
        int monthNow = cal.get(Calendar.MONTH);
        int dayOfMonthNow = cal.get(Calendar.DAY_OF_MONTH);
        if (null == birthDay) {
            return 0;
        } else {
            cal.setTime(birthDay);

            int yearBirth = cal.get(Calendar.YEAR);
            int monthBirth = cal.get(Calendar.MONTH);
            int dayOfMonthBirth = cal.get(Calendar.DAY_OF_MONTH);

            int age = yearNow - yearBirth;

            if (monthNow <= monthBirth) {
                if (monthNow == monthBirth) {
                    // monthNow==monthBirth
                    if (dayOfMonthNow < dayOfMonthBirth) {
                        age--;
                    } else {
                        // do nothing
                    }
                } else {
                    // monthNow>monthBirth
                    age--;
                }
            } else {
                // monthNow<monthBirth
                // donothing
            }
            return age;
        }
    }
}