import java.util.Calendar;
import java.util.Date;
+import java.util.Locale;
public class SimpleDate implements Comparable<SimpleDate> {
public final int year;
calendar.set(year, month, day);
return calendar;
}
+ public String toString() {
+ return String.format(Locale.US, "%d-%02d-%02d", year, month, day);
+ }
}