判断是否为闰年

import java.util.Scanner;

public class java4 {
    public static void main(String[] args) {
        System.out.print("请输入年份");
        int year;
        Scanner scanner=new Scanner(System.in);
        year=scanner.nextInt();
        if(year<0||year>3000){
            System.out.println("年份错误，程序退出");
            System.exit(0);
        }
        if((year%4==0)&&(year%100!=0)||(year%400==0))
            System.out.println(year+"是闰年");
        else
            System.out.println(year+"不是闰年");
    }
}