Java Code for calculating Leap Year

Question

I am following \"The Art and Science of Java\" book and it shows how to calculate a leap year. The book uses ACM Java Task Force\'s library.

Here is the code the boo

Answer 1

Most Efficient Leap Year Test:

if ((year & 3) == 0 && ((year % 25) != 0 || (year & 15) == 0))
{
    /* leap year */
}

This is an excerpt from my detailed answer at https://stackoverflow.com/a/11595914/733805