import java.util.Scanner;
public class leapYear{public static void main(String[] args){int year;Scanner sc = new Scanner(System.in);year = sc.nextInt();if((year % 400 ==0) || (year % 4 == 0 && year % 100 != 0 )){System.out.println(year + "是闰年");}else{System.out.println(year + "不是闰年");}}}
在javac 后加上-encoding UTF-8
即可