年が閏年かどうかを判断する


年が4で除かれ、100で除かれない場合、または400で除かれる場合、この年は閏年です.ここでは型取りで演算を行います.
package net.ma;

import java.util.Scanner;

public class LeapYear {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		long year = 1;
		while (year != 0) {
			System.out.println("Please input a year:");
			year = scan.nextLong();
			if(year%4 == 0 && year%100 != 0 || year%400 == 0) {
				System.out.println(year + " is a leap year!");
			} else {
				System.out.println(year + " is not a leap year!");
			}
		}
	}
}