任何语言都有可能计算某一年是否为瑞年的方法，也就是说一年有 366 天，每隔4 年就出现一次。最基本的算法如下：if year is divisible by 400 then

is_leap_year

else if year is divisible by 100 then

not_leap_year

else if year is divisible by 4 then

is_leap_year

else

not_leap_year

知道了这个基本算法，那么起始与语言无关了，这里就用JAVA 语言做一个讲解

public class DateTimeExample {

public static void main(String[] args) {

DateTimeExample obj = new DateTimeExample();

System.out.println("1993 is a leap year : " + obj.isLeapYear(1993));

System.out.println("1996 is a leap year : " + obj.isLeapYear(1996));

System.out.println("2012 is a leap year : " + obj.isLeapYear(2012));

}

public boolean isLeapYear(int year) {

if ((year % 400 == 0) || ((year % 4 == 0) && (year % 100 != 0))) {

return true;

} else {

return false;

}

}

}

输出结果如下

1993 is a leap year : false

1996 is a leap year : true

2012 is a leap year : true

当然，起始用Calendar 也是可以计算出来的.

import java.util.GregorianCalendar;

//...

public boolean isLeapYear(int year) {

GregorianCalendar cal = (

GregorianCalendar) GregorianCalendar.getInstance();

return cal.isLeapYear(year);

}