Leap year

public class Calendar
{
    private int[] monthDay = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    private String[] monthName = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
    
    public boolean leapYear(int year)
    {
        boolean ans = false;
        
        if(year % 4 == 0)
        {
            ans = true;
        }
        
        if(year % 100 == 0)
        {
            ans = false;
        }
        
        if(year % 400 == 0)
        {
            ans = true;
        }
        return ans;
    }
}