Examples of java.text.DecimalFormat.formatToCharacterIterator()

java.text.DecimalFormat.formatToCharacterIterator()
Formats an Object producing an AttributedCharacterIterator. You can use the returned AttributedCharacterIterator to build the resulting String, as well as to determine information about the resulting String.
Each attribute key of the AttributedCharacterIterator will be of type NumberFormat.Field, with the attribute value being the same as the attribute key. @exception NullPointerException if obj is null. @exception IllegalArgumentException when the Format cannot format thegiven object. @exception ArithmeticException if rounding is needed with roundingmode being set to RoundingMode.UNNECESSARY @param obj The object to format @return AttributedCharacterIterator describing the formatted value. @since 1.4


    // check null argument
    boolean pass = false;
    try
      {
        f1.formatToCharacterIterator(null);
      }
    catch (NullPointerException e)
      {
        pass = true;
      }

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    // check non-numeric argument
    pass = false;
    try
      {
        f1.formatToCharacterIterator("Not a number");
      }
    catch (IllegalArgumentException e)
      {
        pass = true;
      }

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    DecimalFormat f2 = new DecimalFormat("0.##;-0.##");
    
    // result is "-1234.56"
    AttributedCharacterIterator chIter =
      f2.formatToCharacterIterator(Double.valueOf(-1234.56));
    
    Set _keys = chIter.getAllAttributeKeys();
    
    // It seems that we don't get always the same order in the results
    // but the values need to be the ones written later.

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        .getInstance(Locale.US);
    decimalFormat.setRoundingMode(RoundingMode.UNNECESSARY);
    decimalFormat.setMaximumFractionDigits(0);
    try {
      // when rounding is needed, but RoundingMode is set to RoundingMode.UNNECESSARY, throw ArithmeticException
      decimalFormat.formatToCharacterIterator(new Double(1.5));
      fail("ArithmeticException expected");
    } catch (ArithmeticException e) {
      // expected
    }
  }

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      // We need to get a character iterator for the zero part so we can use it if requested
      if (this.zeroFormat != null && zeroFormat.length()!=0) {//PM:7 oct. 2008:performance
        DecimalFormat temp = new DecimalFormat(this.zeroFormat);
        temp.setMultiplier(1);
        this.zeroFormatIterator = temp.formatToCharacterIterator(0);
        this.zeroFormatMaximumFractionalDigits = temp.getMaximumFractionDigits();
      }
      else {
        this.zeroFormatIterator = null;
        this.zeroFormatMaximumFractionalDigits = cNOT_SET;

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      // We need to get a character iterator for the zero part so we can use it if requested
      if (this.zeroFormat != null && zeroFormat.length()!=0) {//PM:7 oct. 2008:performance
        DecimalFormat temp = new DecimalFormat(this.zeroFormat);
        temp.setMultiplier(1);
        this.zeroFormatIterator = temp.formatToCharacterIterator(0);
        this.zeroFormatMaximumFractionalDigits = temp.getMaximumFractionDigits();
      }
      else {
        this.zeroFormatIterator = null;
        this.zeroFormatMaximumFractionalDigits = cNOT_SET;

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      // We need to get a character iterator for the zero part so we can use it if requested
      if (this.zeroFormat != null && zeroFormat.length()!=0) {//PM:7 oct. 2008:performance
        DecimalFormat temp = new DecimalFormat(this.zeroFormat);
        temp.setMultiplier(1);
        this.zeroFormatIterator = temp.formatToCharacterIterator(0);
        this.zeroFormatMaximumFractionalDigits = temp.getMaximumFractionDigits();
      }
      else {
        this.zeroFormatIterator = null;
        this.zeroFormatMaximumFractionalDigits = cNOT_SET;

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      // We need to get a character iterator for the zero part so we can use it if requested
      if (this.zeroFormat != null && zeroFormat.length()!=0) {//PM:7 oct. 2008:performance
        DecimalFormat temp = new DecimalFormat(this.zeroFormat);
        temp.setMultiplier(1);
        this.zeroFormatIterator = temp.formatToCharacterIterator(0);
        this.zeroFormatMaximumFractionalDigits = temp.getMaximumFractionDigits();
      }
      else {
        this.zeroFormatIterator = null;
        this.zeroFormatMaximumFractionalDigits = cNOT_SET;

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        .getInstance(Locale.US);
    decimalFormat.setRoundingMode(RoundingMode.UNNECESSARY);
    decimalFormat.setMaximumFractionDigits(0);
    try {
      // when rounding is needed, but RoundingMode is set to RoundingMode.UNNECESSARY, throw ArithmeticException
      decimalFormat.formatToCharacterIterator(new Double(1.5));
      fail("ArithmeticException expected");
    } catch (ArithmeticException e) {
      // expected
    }
  }

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