Persian Calendar

Hi dear mr Kiani,
I can't run this code which found in doc directory of persian calendar:
import java.util.Date;
import com.ibm.icu.util.TimeZone;
import com.ibm.icu.util.ULocale;
import com.ibm.icu.text.DateFormat;
import com.ghasemkiani.util.icu.PersianCalendar;
// ...
PersianCalendar pc = new PersianCalendar(TimeZone.getTimeZone("Asia/Tehran"));
DateFormat df = pc.getDateTimeFormat(DateFormat.FULL, DateFormat.DEFAULT, new ULocale("fa", "IR", ""));
String result = df.format(new Date());
// ...
The error message is:
The import com.ghasemkiani.util.icu.PersianCalendar conflicts with a type defined in the same file.