判断闰年

四年一闰，百年不闰，四百年又闰。

import java.util.Scanner;public class leap_year{public static void main(String[] args){System.out.println("请输入年份:");Scanner sc = new Scanner(System.in);// 使用Scanner取得一个字符串或一组数字int year = sc.nextInt();// nextInt()将取得的输入字符串转换为整数类型boolean a = false;if (year % 100 == 0){if (year % 400 == 0)a = true;} else if (year % 4 == 0)a = true;if (a)System.out.println(year + "is a leap year");elseSystem.out.println(year + "not a leap year");sc.close();// 关闭操作}}