Compare Calendars for before or after in Java

/*from   ww w.j  ava 2s .co m*/
import java.util.Calendar;
import java.util.GregorianCalendar;

public class Main {
  public static void main(String[] a) {
    GregorianCalendar today = new GregorianCalendar();
    GregorianCalendar thisDate = new GregorianCalendar();
    thisDate.set(Calendar.YEAR, 2000);
    if (thisDate.before(today)) {
      System.out.println("before");
    }
    if (today.after(thisDate)) {
      System.out.println("after");
    }
  }
}