code: import java.util.GregorianCalendar;
  import java.text.MessageFormat;
  
  public class Leapyear{
          public static void main(String[] argv){
                  int[] yrs = {1800,1900,1994,1998,1999,2000,2001,2004,2100};
                  GregorianCalendar cal = new GregorianCalendar();
                  for(int year : yrs){
                          System.err.println(MessageFormat.format("The year {0,number,#} is leaper: {1} / {2}.",
                                                                   year, cal.isLeapYear(year), isLeapYear(year)));
                  }
  
          }
          public static boolean isLeapYear(int year){
                  return (year % 100 == 0) ? (year % 400 == 0) : (year % 4 == 0);
          }
  }
  