判断某年是否是闰年

import java.util.Scanner;
public class IfYear {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner scan = new Scanner(System.in);
System.out.println("请输入一个年份1900");
long number=scan.nextLong();
boolean check= number % 4 == 0 ||(number%100!=0 &&number % 4==0);
if (check)
System.out.println("in a leap year");
else
System.out.println("is not a leap year");

}

}