判断是否是闰年?

package org.cfc.demo;
import java.util.Scanner;
public class BissextileYear {
	public static void main(String[] args) {		
		Scanner scan=new Scanner(System.in);
		System.out.println("请输入年份:");
		int year=scan.nextInt();
		IsBY(year);
	}
	public static  void  IsBY(int i){
		if(i<=0){
			System.out.println("输入有误");
			System.exit(0);
		}else{
			if((i%4==0 && i%100!=0) || (i%400==0) ){
				System.out.println("是闰年");
			}else{
				System.out.println("不是闰年");
			}
		}
	}
}