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");
    	 
	}

}