Problem: Determining Leap Year
A year is a leap year if it is divisible by 4 but not
by 100 or if it is divisible by 400. So you can use the following Boolean expressions to check
whether a year is a leap year:
// A leap year is divisible by 4
boolean isLeapYear = (year % 4 == 0);
// A leap year is divisible by 4 but not by
100
isLeapYear = isLeapYear && (year % 100 != 0);
// A leap year is divisible by 4 but not by
100 or divisible by 400
isLeapYear = isLeapYear || (year % 400 == 0);
or you can combine all these expressions into one like this:
isLeapYear = (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
File name : LeapYear.java
import java.util.Scanner;
public class LeapYear {
public static
void main(String args[]) {
// Create a
Scanner
Scanner
input = new Scanner(System.in);
System.out.print("Enter a year: ");
int year =
input.nextInt();
// Check if
the year is a leap year
boolean
isLeapYear =
(year % 4
== 0 && year % 100 != 0) || (year % 400 == 0);
// Display
the result in a message dialog box
System.out.println(year + " is a leap year? " +
isLeapYear);
}
}
