Question

我有出生日期，可以获得当前日期。

在java中，如何在计算闰年的同时计算某人的年龄？

编辑：我可以使用unix时间戳并比较差异吗？

Answer 1

您可能知道java 8的日期和时间API更改受到Jodatime库本身的启发，因此使用java 8的下一个解决方案看起来与上面的代码示例几乎相似：

LocalDate today = LocalDate.now();
LocalDate birthday = LocalDate.of(1960, Month.JANUARY, 1);

Period p = Period.between(birthday, today);

//Now access the values as below
System.out.println(p.getDays());
System.out.println(p.getMonths());
System.out.println(p.getYears());

Answer 2

    LocalDate birthdate = new LocalDate (1990, 12, 2);
    LocalDate now = new LocalDate();
    Years age = Years.yearsBetween(birthdate, now);

Answer 3

在Java 8：

LocalDate startDate = LocalDate.of(1987, Month.AUGUST, 10);
LocalDate endDate = LocalDate.of(2015, Month.MAY, 27);

long numberOfYears = ChronoUnit.YEARS.between(startDate, endDate);

使用Java 8日期的好例子： Java 8 Date Examples

Answer 4

正如@MadProgrammer建议的那样，您可以使用JodaTime。

以下是示例代码。

LocalDate birthdate = new LocalDate (1970, 1, 20);
LocalDate now = new LocalDate();
Years age = Years.yearsBetween(birthdate, now);

Answer 5

怎么样：

    Date birthDate = new Date(85, 03, 24);

    GregorianCalendar birth = new GregorianCalendar();
    birth.setTime(birthDate);
    int month = birth.get(GregorianCalendar.MONTH);
    int day = birth.get(GregorianCalendar.DAY_OF_MONTH);

    GregorianCalendar now = new GregorianCalendar();

    int age = now.get(GregorianCalendar.YEAR) - birth.get(GregorianCalendar.YEAR);

    int birthMonth = birth.get(GregorianCalendar.MONTH);
    int birthDay = birth.get(GregorianCalendar.DAY_OF_MONTH);
    int nowMonth = now.get(GregorianCalendar.MONTH);
    int nowDay = now.get(GregorianCalendar.DAY_OF_MONTH);

    if (nowMonth>birthMonth) {
        age = age+1;
    } else {
        if (nowMonth == birthMonth) {
            if (nowDay >= birthDay) {
                age= age+1;
            }
        }
    }   
    System.out.println("Now it is my " + age+ " year of life");

在考虑闰年的同时，如何计算出生日期和当前日期的年龄？

5 个答案: