Check a leap year in java

public class LeapYear {

    public static void main(String[] args) {

        int year = 1900;

        boolean leap = false;

        if(year % 4 == 0)

        {

            if( year % 100 == 0)

            {

                // year is divisible by 400, hence the year is a leap year

                if ( year % 400 == 0)

                    leap = true;

                else

                    leap = false;

            }

            else

                leap = true;

        }

        else

            leap = false;

        if(leap)

            System.out.println(year + " is a leap year.");

        else

            System.out.println(year + " is not a leap year.");

    }

}