ERXUnitAwareDecimalFormat

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er.extensions
Class ERXUnitAwareDecimalFormat

java.lang.Object
  java.text.Format
      java.text.NumberFormat
          java.text.DecimalFormat
              er.extensions.ERXUnitAwareDecimalFormat

All Implemented Interfaces:: java.lang.Cloneable, java.io.Serializable

public class ERXUnitAwareDecimalFormat
extends java.text.DecimalFormat
implements java.lang.Cloneable, java.io.Serializable

ERXUnitAwareDecimalFormat extends java.text.DecimalFormat to add an automatic unit conversion feature for the given unit. Convenient to display friendly values for file size, elaps time, etc. Examples:

 
 import java.text.NumberFormat;
 import er.extensions.ERXUnitAwareDecimalFormat
 
 double smallValue = 123.0d;
 double largeValue = 1234567890.0d;
 NumberFormat formatter = new ERXUnitAwareDecimalFormat(ERXUnitAwareDecimalFormat.BYTE);
 formatter.setMaximumFractionDigits(2);
 
 // Will display "123 bytes"
 System.out.println(formatter.format(smallValue)); 
 
 // Will display "1.15 GB"
 System.out.println(formatter.format(largeValue));

Nested Class Summary

static class ERXUnitAwareDecimalFormat.UnitPrefix
          UnitPrefix is an inner class

Nested classes inherited from class java.text.NumberFormat

java.text.NumberFormat.Field

Field Summary

static java.lang.String BYTE
          Predefined computer mass unit; supports: bytes, KB, MB, GB, TB

static java.lang.String GRAM
          Predefined metric weight unit; supports: mg, g, kg, ton, kiloton

static java.lang.String METER
          Predefined metric length unit; supports: nm, micrometer, mm, cm, m, km

static java.lang.String SECOND
          Predefined time unit; supports: ps, ns, microsecond, ms, sec, min, hour, day

protected NSArray unitPrefixArray


Fields inherited from class java.text.DecimalFormat

Fields inherited from class java.text.NumberFormat

FRACTION_FIELD, INTEGER_FIELD

Constructor Summary

ERXUnitAwareDecimalFormat()


ERXUnitAwareDecimalFormat(java.lang.String unitName)


ERXUnitAwareDecimalFormat(java.lang.String pattern, java.text.DecimalFormatSymbols symbols)


ERXUnitAwareDecimalFormat(java.lang.String pattern, java.text.DecimalFormatSymbols symbols, java.lang.String unitName)


Method Summary

java.lang.StringBuffer format(double number, java.lang.StringBuffer toAppendTo, java.text.FieldPosition fieldPosition)
          This method formats the specified double and appends it to a StringBuffer.

java.lang.StringBuffer format(long number, java.lang.StringBuffer toAppendTo, java.text.FieldPosition fieldPosition)
          This method formats the specified long and appends it to a StringBuffer.

Methods inherited from class java.text.DecimalFormat

applyLocalizedPattern, applyPattern, clone, equals, formatToCharacterIterator, getCurrency, getDecimalFormatSymbols, getGroupingSize, getMultiplier, getNegativePrefix, getNegativeSuffix, getPositivePrefix, getPositiveSuffix, hashCode, isDecimalSeparatorAlwaysShown, parse, setCurrency, setDecimalFormatSymbols, setDecimalSeparatorAlwaysShown, setGroupingSize, setMaximumFractionDigits, setMaximumIntegerDigits, setMinimumFractionDigits, setMinimumIntegerDigits, setMultiplier, setNegativePrefix, setNegativeSuffix, setPositivePrefix, setPositiveSuffix, toLocalizedPattern, toPattern

Methods inherited from class java.text.NumberFormat

format, format, format, getAvailableLocales, getCurrencyInstance, getCurrencyInstance, getInstance, getInstance, getIntegerInstance, getIntegerInstance, getMaximumFractionDigits, getMaximumIntegerDigits, getMinimumFractionDigits, getMinimumIntegerDigits, getNumberInstance, getNumberInstance, getPercentInstance, getPercentInstance, isGroupingUsed, isParseIntegerOnly, parse, parseObject, setGroupingUsed, setParseIntegerOnly

Methods inherited from class java.text.Format

format, parseObject

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

BYTE

public static final java.lang.String BYTE

Predefined computer mass unit; supports: bytes, KB, MB, GB, TB

See Also:: Constant Field Values

METER

public static final java.lang.String METER

Predefined metric length unit; supports: nm, micrometer, mm, cm, m, km

See Also:: Constant Field Values

GRAM

public static final java.lang.String GRAM

Predefined metric weight unit; supports: mg, g, kg, ton, kiloton

See Also:: Constant Field Values

SECOND

public static final java.lang.String SECOND

Predefined time unit; supports: ps, ns, microsecond, ms, sec, min, hour, day

See Also:: Constant Field Values

unitPrefixArray

protected final NSArray unitPrefixArray

Constructor Detail