Name: rk38400 Date: 09/15/97


When formatting a date/time value using
a date format the returned field positions
do not match the field ID of the field position.

This worked correctly in previous releases up
to and including 1.1.3.

For example when formatting a date of the form:

12-Sep-97 5:28:55 PM


DateFormat dFormat = DateFormat.getDateTimeInstance();
Calendar value = Calendar.getInstance();

int fieldID = DateFormat.DAY_OF_WEEK_FIELD;
NdFieldPosition fieldPosition = new NdFieldPosition(fieldID);
StringBuffer formattedField = new StringBuffer();

// Format the sample value and get the field position.
dFormat.format(value, formattedField, fieldPosition);

Then

System.out.println("Field = " + formattedField.toString().substring(
                        fieldPosition.getBeginIndex(),
fieldPosition.getEndIndex()) +
                        " Field ID = " + fieldID);


reports

Field = PM Field ID = 9

i.e. PM is identified as
DateFormat.DAY_OF_WEEK_FIELD

For the same date the other mismatches are:

5 is identified as DAY_OF_YEAR_FIELD (id = 10)
12 is identified as HOUR_OF_DAY0_FIELD (id = 5)
55 is identified as WEEK_OF_MONTH_FIELD (id = 13)
28 is identified as WEEK_OF_YEAR_FIELD (id = 12)
company - Neuron Data , email - ###@###.###
======================================================================

ingrid.yao@Eng 1997-12-18

Test case provided by Oracle:
====================================

import java.text.*;
import java.util.*;
import java.*;

public class DF
  
{
  
  public static void main(String args[])
  
  {
  
    DateFormat dFormat = new SimpleDateFormat("h:mm a");
  
    Calendar value = Calendar.getInstance();
  
    int fieldID = DateFormat.AM_PM_FIELD;
  
    fieldID = Calendar.AM_PM;
  
    FieldPosition fieldPosition = new FieldPosition(fieldID);
  
    StringBuffer formattedField = new StringBuffer();
  
    // Format the sample value and get the field position.
  
    dFormat.format(value.getTime(), formattedField, fieldPosition);
  
    System.out.println("Field = " + formattedField.toString().substring(
  
                            fieldPosition.getBeginIndex(),
  
                            fieldPosition.getEndIndex()));
   }
}
  
When run this program should print out "Field = AM" (or PM depending on
what time of day it is run.) instead it just prints out Field =. If you
uncomment the line fieldID = Calendar.AM_PM then it will work. The spec
clearly says that FieldPosition should use the DateFormat constants and not the
Calendar constants.