下列程序的功能是判断某一年是否为闰年。请在横线处填入适当内容,使程序能够正确运行。 import java.io.*; public class LeapYear{ public static void main(String arge[])throws IOExceptionl InputStreamReader ir; BufferdeReadwe in; ir=new InputStreamReader(System.in ; in=new BufferedReader(ir); System. out.println("输入年份是: "); String s=______ int year=Integer.parseInt (s) ; if(year%4==0&&year%100!=0//year%400==0) { System.out.println(""+year+"年是闰年."); } else { System. out.println (""+year+"年不是闰年.. ") ; } }