Examples of NumberFormat

com.google.gwt.i18n.client.NumberFormat

Formats and parses numbers using locale-sensitive patterns. This class provides comprehensive and flexible support for a wide variety of localized formats, including

Locale-specific symbols such as decimal point, group separator, digit representation, currency symbol, percent, and permill
Numeric variations including integers ("123"), fixed-point numbers ("123.4"), scientific notation ("1.23E4"), percentages ("12%"), and currency amounts ("$123")
Predefined standard patterns that can be used both for parsing and formatting, including {@link #getDecimalFormat() decimal}, {@link #getCurrencyFormat() currency}, {@link #getPercentFormat() percentages}, and {@link #getScientificFormat() scientific}
Custom patterns and supporting features designed to make it possible to parse and format numbers in any locale, including support for Western, Arabic, and Indic digits

Patterns

Formatting and parsing are based on customizable patterns that can include a combination of literal characters and special characters that act as placeholders and are replaced by their localized counterparts. Many characters in a pattern are taken literally; they are matched during parsing and output unchanged during formatting. Special characters, on the other hand, stand for other characters, strings, or classes of characters. For example, the '#' character is replaced by a localized digit.

Often the replacement character is the same as the pattern character. In the U.S. locale, for example, the ',' grouping character is replaced by the same character ','. However, the replacement is still actually happening, and in a different locale, the grouping character may change to a different character, such as '.'. Some special characters affect the behavior of the formatter by their presence. For example, if the percent character is seen, then the value is multiplied by 100 before being displayed.

The characters listed below are used in patterns. Localized symbols use the corresponding characters taken from corresponding locale symbol collection, which can be found in the properties files residing in the com.google.gwt.i18n.client.constants. To insert a special character in a pattern as a literal (that is, without any special meaning) the character must be quoted. There are some exceptions to this which are noted below.

Symbol	Location	Localized?	Meaning
`0`	Number	Yes	Digit
`#`	Number	Yes	Digit, zero shows as absent
`.`	Number	Yes	Decimal separator or monetary decimal separator
`-`	Number	Yes	Minus sign
`,`	Number	Yes	Grouping separator
`E`	Number	Yes	Separates mantissa and exponent in scientific notation; need not be quoted in prefix or suffix
`E`	Subpattern boundary	Yes	Separates positive and negative subpatterns
`%`	Prefix or suffix	Yes	Multiply by 100 and show as percentage
`\u2030` (\u005Cu2030)	Prefix or suffix	Yes	Multiply by 1000 and show as per mille
`\u00A4` (\u005Cu00A4)	Prefix or suffix	No	Currency sign, replaced by currency symbol; if doubled, replaced by international currency symbol; if present in a pattern, the monetary decimal separator is used instead of the decimal separator
`'`	Prefix or suffix	No	Used to quote special characters in a prefix or suffix; for example, `"'#'#"` formats `123` to `"#123"`; to create a single quote itself, use two in succession, such as `"# o''clock"`

A NumberFormat pattern contains a postive and negative subpattern separated by a semicolon, such as "#,##0.00;(#,##0.00)". Each subpattern has a prefix, a numeric part, and a suffix. If there is no explicit negative subpattern, the negative subpattern is the localized minus sign prefixed to the positive subpattern. That is, "0.00" alone is equivalent to "0.00;-0.00". If there is an explicit negative subpattern, it serves only to specify the negative prefix and suffix; the number of digits, minimal digits, and other characteristics are ignored in the negative subpattern. That means that "#,##0.0#;(#)" has precisely the same result as "#,##0.0#;(#,##0.0#)".

The prefixes, suffixes, and various symbols used for infinity, digits, thousands separators, decimal separators, etc. may be set to arbitrary values, and they will appear properly during formatting. However, care must be taken that the symbols and strings do not conflict, or parsing will be unreliable. For example, the decimal separator and thousands separator should be distinct characters, or parsing will be impossible.

The grouping separator is a character that separates clusters of integer digits to make large numbers more legible. It commonly used for thousands, but in some locales it separates ten-thousands. The grouping size is the number of digits between the grouping separators, such as 3 for "100,000,000" or 4 for "1 0000 0000".

Pattern Grammar (BNF)

The pattern itself uses the following grammar:

pattern	:=	subpattern ('`;`' subpattern)?
subpattern	:=	prefix? number exponent? suffix?
number	:=	(integer ('`.`' fraction)?) \| sigDigits
prefix	:=	'`\u005Cu0000`'..'`\u005CuFFFD`' - specialCharacters
suffix	:=	'`\u005Cu0000`'..'`\u005CuFFFD`' - specialCharacters
integer	:=	'`#`'* '`0`'*'`0`'
fraction	:=	'`0`'* '`#`'*
sigDigits	:=	'`#`'* '`@`''`@`'* '`#`'*
exponent	:=	'`E`' '`+`'? '`0`'* '`0`'
padSpec	:=	'`*`' padChar
padChar	:=	'`\u005Cu0000`'..'`\u005CuFFFD`' - quote

Notation:

X*	0 or more instances of X
X?	0 or 1 instances of X
X\|Y	either X or Y
C..D	any character from C up to D, inclusive
S-T	characters in S, except those in T

The first subpattern is for positive numbers. The second (optional) subpattern is for negative numbers.

Example

{@example com.google.gwt.examples.NumberFormatExample}

com.google.gwt.visualization.client.formatters.NumberFormat
ogle.com/apis/visualization/documentation/reference.html#numberformatter"> NumberFormat Reference.
com.google.i18n.phonenumbers.Phonemetadata.NumberFormat
com.googlecode.gwt.charts.client.format.NumberFormat
com.ibm.icu.text.NumberFormat
NumberFormat is the abstract base class for all number formats. This class provides the interface for formatting and parsing numbers. NumberFormat also provides methods for determining which locales have number formats, and what their names are.
This is an enhanced version of NumberFormat that is based on the standard version in the JDK. New or changed functionality is labeled NEW or CHANGED.
NumberFormat helps you to format and parse numbers for any locale. Your code can be completely independent of the locale conventions for decimal points, thousands-separators, or even the particular decimal digits used, or whether the number format is even decimal.
To format a number for the current Locale, use one of the factory class methods:
```
 myString = NumberFormat.getInstance().format(myNumber); 
```
If you are formatting multiple numbers, it is more efficient to get the format and use it multiple times so that the system doesn't have to fetch the information about the local language and country conventions multiple times.
```
 NumberFormat nf = NumberFormat.getInstance(); for (int i = 0; i < a.length; ++i) { output.println(nf.format(myNumber[i]) + "; "); } 
```
To format a number for a different Locale, specify it in the call to getInstance.
```
 NumberFormat nf = NumberFormat.getInstance(Locale.FRENCH); 
```
You can also use a NumberFormat to parse numbers:
```
 myNumber = nf.parse(myString); 
```
Use getInstance or getNumberInstance to get the normal number format. Use getIntegerInstance to get an integer number format. Use getCurrencyInstance to get the currency number format. And use getPercentInstance to get a format for displaying percentages. With this format, a fraction like 0.53 is displayed as 53%.
You can also control the display of numbers with such methods as setMinimumFractionDigits. If you want even more control over the format or parsing, or want to give your users more control, you can try casting the NumberFormat you get from the factory methods to a DecimalFormat. This will work for the vast majority of locales; just remember to put it in a try block in case you encounter an unusual one.
NumberFormat is designed such that some controls work for formatting and others work for parsing. The following is the detailed description for each these control methods,
setParseIntegerOnly : only affects parsing, e.g. if true, "3456.78" -> 3456 (and leaves the parse position just after '6') if false, "3456.78" -> 3456.78 (and leaves the parse position just after '8') This is independent of formatting. If you want to not show a decimal point where there might be no digits after the decimal point, use setDecimalSeparatorAlwaysShown on DecimalFormat.
You can also use forms of the parse and format methods with ParsePosition and FieldPosition to allow you to:
- progressively parse through pieces of a string
- align the decimal point and other areas
For example, you can align numbers in two ways:
1. If you are using a monospaced font with spacing for alignment, you can pass the FieldPosition in your format call, with field = INTEGER_FIELD. On output, getEndIndex will be set to the offset between the last character of the integer and the decimal. Add (desiredSpaceCount - getEndIndex) spaces at the front of the string.
2. If you are using proportional fonts, instead of padding with spaces, measure the width of the string in pixels from the start to getEndIndex. Then move the pen by (desiredPixelWidth - widthToAlignmentPoint) before drawing the text. It also works where there is no decimal, but possibly additional characters at the end, e.g., with parentheses in negative numbers: "(12)" for -12.
Synchronization

Number formats are generally not synchronized. It is recommended to create separate format instances for each thread. If multiple threads access a format concurrently, it must be synchronized externally.

DecimalFormat

DecimalFormat is the concrete implementation of NumberFormat, and the NumberFormat API is essentially an abstraction from DecimalFormat's API. Refer to DecimalFormat for more information about this API.
see DecimalFormat see java.text.ChoiceFormat @author Mark Davis @author Helena Shih @author Alan Liu @stable ICU 2.0
java.text.NumberFormat
NumberFormat is the abstract base class for all number formats. This class provides the interface for formatting and parsing numbers. NumberFormat also provides methods for determining which locales have number formats, and what their names are.
NumberFormat helps you to format and parse numbers for any locale. Your code can be completely independent of the locale conventions for decimal points, thousands-separators, or even the particular decimal digits used, or whether the number format is even decimal.
To format a number for the current Locale, use one of the factory class methods:
```
 myString = NumberFormat.getInstance().format(myNumber); 
```
If you are formatting multiple numbers, it is more efficient to get the format and use it multiple times so that the system doesn't have to fetch the information about the local language and country conventions multiple times.
```
 NumberFormat nf = NumberFormat.getInstance(); for (int i = 0; i < myNumber.length; ++i) { output.println(nf.format(myNumber[i]) + "; "); } 
```
To format a number for a different Locale, specify it in the call to getInstance.
```
 NumberFormat nf = NumberFormat.getInstance(Locale.FRENCH); 
```
You can also use a NumberFormat to parse numbers:
```
 myNumber = nf.parse(myString); 
```
Use getInstance or getNumberInstance to get the normal number format. Use getIntegerInstance to get an integer number format. Use getCurrencyInstance to get the currency number format. And use getPercentInstance to get a format for displaying percentages. With this format, a fraction like 0.53 is displayed as 53%.
You can also control the display of numbers with such methods as setMinimumFractionDigits. If you want even more control over the format or parsing, or want to give your users more control, you can try casting the NumberFormat you get from the factory methods to a DecimalFormat. This will work for the vast majority of locales; just remember to put it in a try block in case you encounter an unusual one.
NumberFormat and DecimalFormat are designed such that some controls work for formatting and others work for parsing. The following is the detailed description for each these control methods,
setParseIntegerOnly : only affects parsing, e.g. if true, "3456.78" -> 3456 (and leaves the parse position just after index 6) if false, "3456.78" -> 3456.78 (and leaves the parse position just after index 8) This is independent of formatting. If you want to not show a decimal point where there might be no digits after the decimal point, use setDecimalSeparatorAlwaysShown.
setDecimalSeparatorAlwaysShown : only affects formatting, and only where there might be no digits after the decimal point, such as with a pattern like "#,##0.##", e.g., if true, 3456.00 -> "3,456." if false, 3456.00 -> "3456" This is independent of parsing. If you want parsing to stop at the decimal point, use setParseIntegerOnly.
You can also use forms of the parse and format methods with ParsePosition and FieldPosition to allow you to:
- progressively parse through pieces of a string
- align the decimal point and other areas
For example, you can align numbers in two ways:
1. If you are using a monospaced font with spacing for alignment, you can pass the FieldPosition in your format call, with field = INTEGER_FIELD. On output, getEndIndex will be set to the offset between the last character of the integer and the decimal. Add (desiredSpaceCount - getEndIndex) spaces at the front of the string.
2. If you are using proportional fonts, instead of padding with spaces, measure the width of the string in pixels from the start to getEndIndex. Then move the pen by (desiredPixelWidth - widthToAlignmentPoint) before drawing the text. It also works where there is no decimal, but possibly additional characters at the end, e.g., with parentheses in negative numbers: "(12)" for -12.
Synchronization

Number formats are generally not synchronized. It is recommended to create separate format instances for each thread. If multiple threads access a format concurrently, it must be synchronized externally. @see DecimalFormat @see ChoiceFormat @version 1.74, 11/17/05 @author Mark Davis @author Helena Shih
jxl.write.NumberFormat
A custom user defined number format, which may be instantiated within user applications in order to present numerical values to the appropriate level of accuracy. The string format used to create a number format adheres to the standard java specification, and JExcelAPI makes the necessary modifications so that it is rendered in Excel as the nearest possible equivalent. Once created, this may be used within a CellFormat object, which in turn is a parameter passed to the constructor of the Number cell
org.docx4j.wml.NumberFormat
org.formulacompiler.spreadsheet.internal.excel.xlsx.loader.NumberFormat

Examples of java.text.NumberFormat

   * @param oLocale Locale used for formatting
   * @return String
   * @see <a href="http://java.sun.com/j2se/1.4.2/docs/api/java/util/Locale.html">java.util.Locale</a>
   */
  public static String formatCurrency (BigDecimal oDec, String sCurrency, Locale oLocale) {
    NumberFormat oFmtC;
    if (null==oDec) return null;


    if (null==sCurrency) {
      oCurr = Currency.getInstance(oLocale==null ? Locale.getDefault() : oLocale);
    }
    else if (!sCurrency.equals(sCurr)) {
      oCurr = Currency.getInstance(sCurrency);
    }
    if (null==oLocale)
      oFmtC = NumberFormat.getCurrencyInstance(Locale.getDefault());
    else
      oFmtC = NumberFormat.getCurrencyInstance(oLocale);
    oFmtC.setCurrency(oCurr);
    return oFmtC.format(oDec.doubleValue());
  } // formatCurrency

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Examples of java.text.NumberFormat

      oLoc = new Locale(sLanguage,sCountry);
    else if (null!=sLanguage)
      oLoc = new Locale(sLanguage);
    else
      oLoc = Locale.getDefault();
    NumberFormat oFmtC = NumberFormat.getCurrencyInstance(oLoc);
    oFmtC.setCurrency(currencyCode().currency());
    return oFmtC.format(doubleValue());
  } // format

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Examples of java.text.NumberFormat

    // Systemspeziefischen Zeilenumbruch holen
    String lineSeparator = RegainToolkit.getLineSeparator();


    // Statistik ausgeben
    StringBuffer buffer = new StringBuffer(mName + ":");
    NumberFormat integerFormat = NumberFormat.getInstance();
    integerFormat.setMaximumFractionDigits(0);
    if (abortedMeasureCount > 0) {
      buffer.append(lineSeparator);


      appendLabel(buffer, "Aborted " + mUnit, minLabelLength);
      buffer.append(integerFormat.format(abortedMeasureCount) + " " + mUnit + " (");


      // Ausgeben, wieviel % der Messungen fehl schlugen
      int total = abortedMeasureCount + measureCount;
      double errorPercent = (double) abortedMeasureCount / (double) total;
      buffer.append(RegainToolkit.toPercentString(errorPercent));


      buffer.append(")");
    }
    if (measureCount > 0) {
      buffer.append(lineSeparator);


      appendLabel(buffer, "Completed " + mUnit, minLabelLength);
      buffer.append(integerFormat.format(measureCount) + " " + mUnit + lineSeparator);


      appendLabel(buffer, "Total time", minLabelLength);
      buffer.append(RegainToolkit.toTimeString(totalTime) + lineSeparator);


      appendLabel(buffer, "Total data", minLabelLength);
      buffer.append(RegainToolkit.bytesToString(totalBytes) + lineSeparator);


      appendLabel(buffer, "Average time", minLabelLength);
      buffer.append(RegainToolkit.toTimeString(averageTime) + lineSeparator);


      appendLabel(buffer, "Average data", minLabelLength);
      buffer.append(RegainToolkit.bytesToString(averageBytes) + lineSeparator);


      appendLabel(buffer, "Data rate", minLabelLength);
      buffer.append(RegainToolkit.bytesToString(dataRatePerSec) + "/sec" + lineSeparator);


      appendLabel(buffer, "Output", minLabelLength);
      if (countsPerMinute > 10) {
        // No decimals when the count is high
        buffer.append(integerFormat.format(countsPerMinute) + " " + mUnit + "/min");
      } else {
        NumberFormat floatingFormat = NumberFormat.getInstance();
        floatingFormat.setMinimumFractionDigits(2);
        floatingFormat.setMaximumFractionDigits(2);
        buffer.append(floatingFormat.format(countsPerMinute) + " " + mUnit + "/min");
      }
    }


    return buffer.toString();
  }

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Examples of java.text.NumberFormat

      list.toArray(mExtensionArr);


      if (mLog.isDebugEnabled()) {
        double duration = (double) (System.currentTimeMillis() - startTime) / 1000.0;


        NumberFormat format = NumberFormat.getInstance();
        format.setMinimumFractionDigits(2);
        format.setMaximumFractionDigits(2);


        mLog.debug("Getting the supported extensions of the IfilterPreparator took "
            + format.format(duration) + " secs");
      }
    }


    return mExtensionArr;
  }

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Examples of java.text.NumberFormat


    Document doc=new Document();
    Enumeration nameIter=prop.propertyNames();
    while(nameIter.hasMoreElements()){
      String name=(String)nameIter.nextElement();
      NumberFormat format=formatterHash.get(name);
      String val=prop.getProperty(name);
      
      String[] vals=val.split(",");
      for (int i=0;i<vals.length;++i){
        if (vals[i]!=null && vals[i].length()>0){
          if (format!=null){
            vals[i]=format.format(Double.parseDouble(vals[i]));
          }
          doc.add(new Field(name,vals[i],Field.Store.NO,Field.Index.NOT_ANALYZED,Field.TermVector.NO));
        }
      }  
    }

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Examples of java.text.NumberFormat

      }


      if (mLog.isDebugEnabled()) {
        double duration = (double) (System.currentTimeMillis() - startTime) / 1000.0;


        NumberFormat format = NumberFormat.getInstance();
        format.setMinimumFractionDigits(2);
        format.setMaximumFractionDigits(2);


        mLog.debug("..." + toCommand(commandArr) + " finished ("
            + format.format(duration) + " secs)");
      }


      if (exitCode != 0) {
        throw new RegainException("Native command exited with exit code "
            + exitCode + ": '" + toCommand(commandArr) + "'");

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Examples of java.text.NumberFormat

      assertEquals("2011", Util.toFourDigitYear("11", 2001));
      
      int thisYear = Calendar.getInstance().get(Calendar.YEAR);
      int d2 = thisYear % 100;


      NumberFormat f = new DecimalFormat("00");
      
      for (int i = 0; i <= 30; i++){
        assertTrue("" + i, thisYear <= Integer.parseInt(Util.toFourDigitYear(f.format((d2 + i) % 100))));
      }
      for (int i = 0; i < 70; i++){
        assertTrue("" + i, thisYear >= Integer.parseInt(Util.toFourDigitYear(f.format((d2 - i + 100) % 100))));
      }
    }

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Examples of java.text.NumberFormat

        private void printScriptExecDetails(int statementCount,
                double executionLength,
                double outputLength,
                double totalLength) 
        {
            final NumberFormat nbrFmt = NumberFormat.getNumberInstance();


            Object[] args = new Object[] {
                Integer.valueOf(statementCount),
                nbrFmt.format(totalLength),
                nbrFmt.format(executionLength),
                nbrFmt.format(outputLength)
            };


            //i18n[SQLResultExecuterPanel.scriptQueryStatistics=Executed {0} 
            //queries; elapsed time (seconds) - Total: {1}, SQL query: {2}, 
            //Building output: {3}]

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Examples of java.text.NumberFormat

                Integer numberResultRowsRead,
                double executionLength,
                double outputLength,
                double totalLength)
        {
            final NumberFormat nbrFmt = NumberFormat.getNumberInstance();


            Object[] args = new Object[] {
                    Integer.valueOf(processedStatementCount),
                    Integer.valueOf(statementCount),
                    numberResultRowsRead == null ? 0: numberResultRowsRead,
                    nbrFmt.format(totalLength),
                    nbrFmt.format(executionLength),
                    nbrFmt.format(outputLength)
            };


            //i18n[SQLResultExecuterPanel.queryStatistics=Query {0} of {1} 
            //elapsed time (seconds) - Total: {2}, SQL query: {3}, 
            //Building output: {4}]

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Examples of java.text.NumberFormat

  public static String getSize(int bytes) {
    if (bytes > 0) {
      double mb = bytes / (1024d * 1024d);
      double kb = bytes / 1024d;


      NumberFormat format = new DecimalFormat(Messages.OwlUI_SIZE_FORMAT);


      if (mb >= 1)
        return NLS.bind(Messages.OwlUI_N_MB, format.format(mb));


      if (kb >= 1)
        return NLS.bind(Messages.OwlUI_N_KB, format.format(kb));


      return NLS.bind(Messages.OwlUI_N_BYTES, bytes);
    }


    return null;

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