Examples of java.text.FieldPosition

java.text.FieldPosition
FieldPosition is a simple class used by Format and its subclasses to identify fields in formatted output. Fields can be identified in two ways:
- By an integer constant, whose names typically end with _FIELD. The constants are defined in the various subclasses of Format.
- By a Format.Field constant, see ERA_FIELD and its friends in DateFormat for an example.
FieldPosition keeps track of the position of the field within the formatted output with two indices: the index of the first character of the field and the index of the last character of the field.
One version of the format method in the various Format classes requires a FieldPosition object as an argument. You use this format method to perform partial formatting or to get information about the formatted output (such as the position of a field).
If you are interested in the positions of all attributes in the formatted string use the Format method formatToCharacterIterator. @version 1.22 11/17/05 @author Mark Davis @see java.text.Format

        StringBuffer bb = new StringBuffer();
        SimpleDateFormat s =  new SimpleDateFormat(this.getQueuePattern());
        
        if (!path.endsWith("/") && !path.endsWith("\\") ) path += "/";
        
        FieldPosition fp = new FieldPosition(0);
        StringBuffer b =  s.format(d, bb, fp);
        String lastGeneratedFilename = path + this.getQueuePrefix() + b + ".email";


        File f = new File(lastGeneratedFilename);
        while (f.exists()){

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    EmailMsg result = null;
    String updStr = null;


    try {
      StringBuffer dateStr = new StringBuffer();
      FieldPosition pos = new FieldPosition(0);
      this.dateFmt.format( new java.util.Date(), dateStr, pos );


      int emailId = this.getNextId( "email" );


      updStr =

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  commit( EmailMsg msg )
    throws DBIException
    {
    try {
      StringBuffer dateStr = new StringBuffer();
      FieldPosition pos = new FieldPosition(0);
      this.dateFmt.format( new java.util.Date(), dateStr, pos );


      StringBuffer buf = new StringBuffer();


      if ( msg.isInDatabase() )

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    cW.println( "</table>" );


    cW.println( "<p>" );


    StringBuffer openDateStr = new StringBuffer();
    FieldPosition openPos = new FieldPosition(0);
    this.dateFmt.format( bug.getOpenDate(), openDateStr, openPos );


    cW.println( "<strong>Date Opened:</strong>" );
    cW.println( openDateStr.toString() );
    cW.println( "<br>" ); 


    StringBuffer closeDateStr = new StringBuffer();
    if ( bug.getCloseDate() == null )
      {
      closeDateStr.append( "Not closed." );
      }
    else
      {
      FieldPosition closePos = new FieldPosition(0);
      this.dateFmt.format( bug.getCloseDate(), closeDateStr, closePos );
      }


    cW.println( "<strong>Date Closed:</strong>" );
    cW.println( closeDateStr.toString() );

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    cW.println( "<strong>Submitter:</strong>" );
    cW.println( this.dbConfig.formatPerson( rep.getSubmitter() ) );
    cW.println( "<br>" );


    StringBuffer dateStr = new StringBuffer();
    FieldPosition pos = new FieldPosition(0);
    this.dateFmt.format( rep.getSubmitted(), dateStr, pos );


    cW.println( "<strong>Date Submitted:</strong>" );
    cW.println( dateStr.toString() );
    cW.println( "<br>" );

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      }
    cW.print  ( ",&nbsp; &nbsp;" );


    StringBuffer dBuf = new StringBuffer();
    this.dateFmt.format
      ( action.getActionTime(), dBuf, new FieldPosition(0) );


    cW.println( dBuf );
    cW.println( "<br>" );


    cW.println( "<blockquote>" );

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                    break;
                case JExifTag.EXIFTAG_TAG_CHANGEDATETIME:
                    if ((date = JIfdData.getDateFromString(data.getChangeDateTime())) != null)
                    {
                        strBuf = new StringBuffer();
                        Main.m_shortDayOfWeekFormat.format(date, strBuf, new FieldPosition(0));
                        obj = strBuf + ", " + DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT).format(date);
                    }
                    else obj = "";
                    break;
                case JExifTag.EXIFTAG_TAG_ARTIST:
                    obj = data.getArtist();
                    break;
                case JExifTag.EXIFTAG_TAG_DESCRIPTION:
                    obj = data.getDescription();
                    break;
                case JExifTag.EXIFTAG_TAG_YCBCRPOSITION:
                    obj = Main.getString(String.format("data_ycbcrposition_0x%1$04X", data.getYCbCrPosition()));
                    break;
                case JExifTag.EXIFTAG_TAG_COPYRIGHT:
                    obj = data.getCopyright();
                    break;
                case JExifTag.EXIFTAG_TAG_EXPOSURETIME:
                    data.getExposureTime(str);
                    obj = str[0];
                    break;
                case JExifTag.EXIFTAG_TAG_FNUMBER:
                    data.getFNumber(str);
                    obj = str[0];
                    break;
                case JExifTag.EXIFTAG_TAG_EXPOSUREPROGRAM:
                    try
                    {
                        obj = Main.getString(String.format("data_exposureprogram_0x%1$04X", data.getExposureProgram()));
                    }
                    catch(MissingResourceException ex)
                    {
                        obj = Main.getString("data_exposureprogram_reserved");
                    }
                    break;
                case JExifTag.EXIFTAG_TAG_ISOSPEEDRATINGS:
                    obj = data.getISOSpeedRatings();
                    break;
                case JExifTag.EXIFTAG_TAG_EXIFVERSION:
                    obj = data.getExifVersion();
                    break;
                case JExifTag.EXIFTAG_TAG_ORIGINALDATETIME:
                    if ((date = JIfdData.getDateFromString(data.getOriginalDateTime())) != null)
                    {
                        strBuf = new StringBuffer();
                        Main.m_shortDayOfWeekFormat.format(date, strBuf, new FieldPosition(0));
                        obj = strBuf + ", " + DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT).format(date);
                    }
                    else obj = "";
                    break;
                case JExifTag.EXIFTAG_TAG_DIGITIZEDDATETIME:
                    if ((date = JIfdData.getDateFromString(data.getDigitizedDateTime())) != null)
                    {
                        strBuf = new StringBuffer();
                        Main.m_shortDayOfWeekFormat.format(date, strBuf, new FieldPosition(0));
                        obj = strBuf + ", " + DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT).format(date);
                    }
                    else obj = "";
                    break;
                case JExifTag.EXIFTAG_TAG_COMPONENTSCCONFIG:
                    obj = data.getComponentsConfig();
                    break;
                case JExifTag.EXIFTAG_TAG_COMPRESSEDPITSPERPIXEL:
                    obj = data.getCompressedBitsPerPixel();
                    break;
                case JExifTag.EXIFTAG_TAG_SHUTERSPEEDVALUE:
                    obj = data.getShuterSpeedValue();
                    break;
                case JExifTag.EXIFTAG_TAG_APERTUREVALUE:
                    obj = data.getApertureValue();
                    break;
                case JExifTag.EXIFTAG_TAG_BRIGHTNESSVALUE:
                    obj = data.getBrightnessValue();
                    break;
                case JExifTag.EXIFTAG_TAG_EXPOSUREBIASVALUE:
                    obj = data.getExposureBiasValue();
                    break;
                case JExifTag.EXIFTAG_TAG_MAXAPERTUREVALUE:
                    obj = data.getMaxApertureValue();
                    break;
                case JExifTag.EXIFTAG_TAG_METERINGMODE:
                    try
                    {
                        obj = Main.getString(String.format("data_meteringmode_0x%1$04X", data.getMeteringMode()));
                    }
                    catch(MissingResourceException ex)
                    {
                        obj = Main.getString("data_meteringmode_reserved");
                    }
                    break;
                case JExifTag.EXIFTAG_TAG_LIGHTSOURCE:
                    try
                    {
                        obj = Main.getString(String.format("data_lightsource_0x%1$04X", data.getLightSource()));
                    }
                    catch(MissingResourceException ex)
                    {
                        obj = Main.getString("data_lightsource_reserved");
                    }


                    break;
                case JExifTag.EXIFTAG_TAG_FLASH:
                    h = data.getFlash();
                    if ((h & 0x01) != 0)
                    {
                        str[0] = Main.getString(String.format("data_flash_yes"));
                        if (((h & 0x06) >> 1) == 0x02)
                            str[0] += ", " + Main.getString("data_flash_strobereturnnotdetected");
                        else if (((h & 0x06) >> 1) == 0x03)
                            str[0] += ", " + Main.getString("data_flash_strobereturndetected");


                        if (((h & 0x18) >> 3) == 0)
                            str[0] += ", " + Main.getString("data_flash_modeunknown");
                        else if (((h & 0x18) >> 3) == 0x01)
                            str[0] += ", " + Main.getString("data_flash_modecompulsory");
                        else if (((h & 0x18) >> 3) == 0x03)
                            str[0] += ", " + Main.getString("data_flash_modeauto");


                        if ((h & 0x40) != 0)
                            str[0] += ", " + Main.getString("data_flash_moderedeyereduction");
                    }
                    else
                    {
                        if ((h & 0x20) != 0)
                        {
                            str[0] = Main.getString(String.format("data_flash_notavailable"));
                        }
                        else
                        {
                            str[0] = Main.getString(String.format("data_flash_no"));
                            if (((h & 0x18) >> 3) == 0x01)
                            str[0] += ", " + Main.getString("data_flash_modecompulsorysuppression");
                        }
                    }
                    obj = str[0];
                    break;
                case JExifTag.EXIFTAG_TAG_FOCALLENGTH:
                    obj = data.getFocalLength();
                    break;
                case JExifTag.EXIFTAG_TAG_COLORSPACE:
                    obj = Main.getString(String.format("data_colorspace_0x%1$04X", data.getColorSpace()));
                    break;
                case JExifTag.EXIFTAG_TAG_SIZE:
                    obj = String.format("%1$dx%2$d", data.getPixelXDimension(), data.getPixelYDimension());
                    break;
                case JExifTag.EXIFTAG_TAG_FOCALPLANERESOLUTION:
                    obj = String.format("%1$.1f/%3$s x %2$.1f/%3$s", data.getFocalPlaneXResolution(), data.getFocalPlaneYResolution(), Main.getString(String.format("data_unit_0x%1$04X", data.getFocalPlaneResolutionUnit())));
                    break;
                case JExifTag.EXIFTAG_TAG_SENSINGMODE:
                    obj = Main.getString(String.format("data_sensingmode_0x%1$04X", data.getSensingMode()));
                    break;
                case JExifTag.EXIFTAG_TAG_CUSTOMRENDERED:
                    obj = Main.getString(String.format("data_customrendered_0x%1$04X", data.getCustomRendered()));
                    break;
                case JExifTag.EXIFTAG_TAG_EXPOSUREMODE:
                    obj = Main.getString(String.format("data_exposuremode_0x%1$04X", data.getExposureMode()));
                    break;
                case JExifTag.EXIFTAG_TAG_WHITEBALANCE:
                    obj = Main.getString(String.format("data_whitebalance_0x%1$04X", data.getWhiteBalance()));
                    break;
                case JExifTag.EXIFTAG_TAG_DIGITALZOOMRATIO:
                    obj = data.getDigitalZoomRatio();
                    break;
                case JExifTag.EXIFTAG_TAG_FOCALLENGTH35MM:
                    obj = data.getFocalLength35mm();
                    break;
                case JExifTag.EXIFTAG_TAG_SCENECAPTURETYPE:
                    obj = Main.getString(String.format("data_scenecapturetype_0x%1$04X", data.getSceneCaptureType()));
                    break;
                case JExifTag.EXIFTAG_TAG_SCENETYPE:
                    obj = Main.getString(String.format("data_scenetype_0x%1$04X", data.getSceneType()));
                    break;
                case JExifTag.EXIFTAG_TAG_GAINCONTROL:
                    obj = Main.getString(String.format("data_gaincontrol_0x%1$04X", data.getGainControl()));
                    break;
                case JExifTag.EXIFTAG_TAG_CONTRAST:
                    obj = Main.getString(String.format("data_contrast_0x%1$04X", data.getContrast()));
                    break;
                case JExifTag.EXIFTAG_TAG_SATURATION:
                    obj = Main.getString(String.format("data_saturation_0x%1$04X", data.getSaturation()));
                    break;
                case JExifTag.EXIFTAG_TAG_SHARPNESS:
                    obj = Main.getString(String.format("data_sharpness_0x%1$04X", data.getSharpness()));
                    break;
                case JExifTag.EXIFTAG_TAG_SUBJECTDISTANCERANGE:
                    obj = Main.getString(String.format("data_subjectdistancerange_0x%1$04X", data.getSubjectDistanceRange()));
                    break;
                case JExifTag.EXIFTAG_TAG_FILESIZE:
                    StringBuilder strBuilder = new StringBuilder();
                    if (data.getFileSize() < 1024)
                    strBuilder.append(Long.toString(data.getFileSize()));
                    else if (data.getFileSize() < 1024*1024)
                    {
                        strBuilder.append(String.format("%1$.1f ", (float)data.getFileSize()/1024.0f));
                        strBuilder.append(Main.getString("KByte"));
                    }
                    else if (data.getFileSize() < 1024*1024*1024)
                    {
                        strBuilder.append(String.format("%1$.2f ", (float)data.getFileSize()/(1024.0f*1024.0f)));
                        strBuilder.append(Main.getString("MByte"));
                    }
                    obj = strBuilder.toString();
                    break;
                case JExifTag.EXIFTAG_TAG_FILEDATETIME:
                    if ((date = data.getFileDate()) != null)
                    {
                        strBuf = new StringBuffer();
                        Main.m_shortDayOfWeekFormat.format(date, strBuf, new FieldPosition(0));
                        obj = strBuf + ", " + DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT).format(date);
                    }
                    else obj = "";
                    break;
                case JExifTag.EXIFTAG_TAG_FILESOURCE:
                    obj = Main.getString(String.format("data_filesource_0x%1$04X", data.getFileSource()));
                    break;
                // GPS stuff
                case JExifTag.GPSTAG_TAG_VERSIONID:
                    obj = data.getGPSVersionID();
                    break;
                case JExifTag.GPSTAG_TAG_LATITUDE:
                    obj = String.format("%.6f° %s", data.getGPSLatitude(), Main.getString(String.format("data_gps_latituderef_%s", data.getGPSLatitudeRef())));
                    break;
                case JExifTag.GPSTAG_TAG_LONGITUDE:
                    obj = String.format("%.6f° %s", data.getGPSLongitude(), Main.getString(String.format("data_gps_longituderef_%s", data.getGPSLongitudeRef())));
                    break;
                case JExifTag.GPSTAG_TAG_ALTITUDE:
                    int ref = data.getGPSAltitudeRef();
                    if (ref>=0)
                        ref = ref != 0 ? -1 : 1;
                    else throw new MissingResourceException(null, null, null);
                    float f = data.getGPSAltitude();
                    if (Float.isNaN(f))
                        throw new MissingResourceException(null, null, null);
                    else
                        obj = String.format("%.1f m", ref*f, Main.getString("data_gps_altitude_unit"));
                    break;
                case JExifTag.GPSTAG_TAG_TIMESTAMP:
                    strBuf = new StringBuffer();
                    date = data.getGPSTimestamp();
                    if (date != null)
                    {
                        Main.m_shortDayOfWeekFormat.format(date, strBuf, new FieldPosition(0));
                        obj = strBuf + ", " + DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT).format(date);
                    }
                    else obj = null;
                case JExifTag.GPSTAG_TAG_SATELLITES:
                    obj = data.getGPSSatellites();

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                                    Date date = JIfdData.getDateFromString(data.getDigitizedDateTime());
                                    if (date == null)
                                        date = data.getFileDate();
                                    SimpleDateFormat sdf = new SimpleDateFormat("EEEE");
                                    StringBuffer strBuf = new StringBuffer();
                                    sdf.format(date, strBuf, new FieldPosition(0));
                                    String strDate = strBuf + ", " + DateFormat.getDateInstance(DateFormat.LONG).format(date);
                                    String strTime = DateFormat.getTimeInstance(DateFormat.MEDIUM).format(date);
                                    String fileName = data.getFullFileName();
                                    title = String.format(Main.getString("data_gps_title"), fileName, strDate, strTime);
                                    String laStr = JExifDataModel.getTagValue(data, JExifTag.GPSTAG_TAG_LATITUDE).toString();

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            Date date = JIfdData.getDateFromString(str);
            if (date == null)
                date = data.getFileDate();
            SimpleDateFormat sdf = new SimpleDateFormat("EEEE");
            StringBuffer strBuf = new StringBuffer();
            sdf.format(date, strBuf, new FieldPosition(0));
            String strDate = strBuf + ", " + DateFormat.getDateInstance(DateFormat.LONG).format(date);
            String strTime = DateFormat.getTimeInstance(DateFormat.MEDIUM).format(date);
            String dirStr = "";
            if (m_slideshowTimer.isRunning())
            {

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      if ((2 < formatting.length())
        && (formatting.charAt(1) == '.')
        && Character.isDigit(formatting.charAt(2))) {
        numberFormat.setMaximumFractionDigits(
          Integer.parseInt(formatting.charAt(2) + ""));
        numberFormat.format(number, outputTo, new FieldPosition(0));
        return 3;
      }
      numberFormat.format(number, outputTo, new FieldPosition(0));
      return 1;
    } else if (
      (0 < formatting.length()) && (formatting.charAt(0) == '.')) {
      if ((1 < formatting.length())
        && Character.isDigit(formatting.charAt(1))) {
        numberFormat.setMaximumFractionDigits(
          Integer.parseInt(formatting.charAt(1) + ""));
        numberFormat.format(number, outputTo, new FieldPosition(0));
        return 2;
      }
    }
    numberFormat.format(number, outputTo, new FieldPosition(0));
    return 1;
  }

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