java leap year expression

1import java.util.Scanner;
2public class LeapYear {
3   public static void main(String[] args){
4      int year;
5      System.out.println("Enter an Year :: ");
6      Scanner sc = new Scanner(System.in);
7      year = sc.nextInt();
8
9      if (((year % 4 == 0) && (year % 100!= 0)) || (year%400 == 0))
10         System.out.println("Specified year is a leap year");
11      else
12         System.out.println("Specified year is not a leap year");
13   }
14}

1public static boolean isLeapYear(int year) {
2  if (year % 4 != 0) {
3    return false;
4  } else if (year % 400 == 0) {
5    return true;
6  } else if (year % 100 == 0) {
7    return false;
8  } else {
9    return true;
10  }
11}

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

1public class LeapYear {
2
3    public static void main(String[] args) {
4
5        int year = 1900;
6        boolean leap = false;
7
8        if(year % 4 == 0)
9        {
10            if( year % 100 == 0)
11            {
12                // year is divisible by 400, hence the year is a leap year
13                if ( year % 400 == 0)
14                    leap = true;
15                else
16                    leap = false;
17            }
18            else
19                leap = true;
20        }
21        else
22            leap = false;
23
24        if(leap)
25            System.out.println(year + " is a leap year.");
26        else
27            System.out.println(year + " is not a leap year.");
28    }
29}