wt.clients.widgets
Class NumericToolkit

java.lang.Object
  wt.clients.widgets.NumericToolkit

public class NumericToolkit

extends Object

Field Summary

private static char	DECIMAL_SEPARATOR
private static char	EXPONENT_CHAR
private static DecimalFormatSymbols	formatSymbols
private static char	GROUPING_SEPARATOR
static int	MAX_SIG_FIGS
private static char	MINUS_SIGN
private static char	ZERO_DIGIT

Constructor Summary

private

NumericToolkit()

Method Summary

static int	countSigFigs(String valueString) Returns the number of significant figures that exist in the specified string representation of a floating point number.
static int	countSigFigs(String valueString, Locale locale) Returns the number of significant figures that exist in the specified string representation of a floating point number.
static String	doubleToString(double doubleValue) Returns a string representation of the specified double rounded to non-zero digits.
static String	doubleToString(double doubleValue, int numDigits) Returns a string representation of the specified double rounded to the specified number of digits.
static String	doubleToString(double doubleValue, int numDigits, Locale locale) Returns a string representation of the specified double rounded to the specified number of digits.
static String	doubleToString(double doubleValue, Locale locale) Returns a string representation of the specified double rounded to non-zero digits.
static String	makeLegalString(String stringValue)
static String	makeLegalString(String stringValue, Locale locale)
static double	roundingEquivalent(double doubleValue, int roundingDigits, int roundingDirection) Returns the largest or smallest double that, when rounded to the specified number of digits, is equal to the specified double rounded to the same number of digits.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAX_SIG_FIGS

public static final int MAX_SIG_FIGS

See Also:

Constant Field Values

formatSymbols

private static final DecimalFormatSymbols formatSymbols

DECIMAL_SEPARATOR

private static final char DECIMAL_SEPARATOR

GROUPING_SEPARATOR

private static final char GROUPING_SEPARATOR

MINUS_SIGN

private static final char MINUS_SIGN

ZERO_DIGIT

private static final char ZERO_DIGIT

EXPONENT_CHAR

private static final char EXPONENT_CHAR

See Also:

Constant Field Values

Constructor Detail

NumericToolkit

private NumericToolkit()

Method Detail

countSigFigs

public static int countSigFigs(String valueString)

Returns the number of significant figures that exist in the specified string representation of a floating point number.

Parameters:

valueString - the string that represents the floating point number.

Returns:

the number of significant figures that exist in the specified string representation of a floating point number.

doubleToString

public static String doubleToString(double doubleValue,
                                    int numDigits)

Returns a string representation of the specified double rounded to the specified number of digits. If possible, the string is returned in floating point format. Otherwise, the string is returned in exponential format.

Parameters:

doubleValue -

numDigits -

Returns:

String

doubleToString

public static String doubleToString(double doubleValue)

Returns a string representation of the specified double rounded to non-zero digits. If possible, the string is returned in floating point format. Otherwise, the string is returned in exponential format.

Parameters:

doubleValue -

Returns:

String

roundingEquivalent

public static double roundingEquivalent(double doubleValue,
                                        int roundingDigits,
                                        int roundingDirection)

Returns the largest or smallest double that, when rounded to the specified number of digits, is equal to the specified double rounded to the same number of digits. If the specified rounding direction is -1, then the largest double is returned. If the specified rounding direction is 1, then the smallest double is returned. If the specified number of digits is less than 1 or greater than MAX_SIG_FIGS, then the number of digits that will be used in calculating the return value will be MAX_SIG_FIGS.

Parameters:

roundingDigits - the number of digits that will be considered when calculating the rounding equivalent.

roundingDirection - the rounding direction, up or down, that will be used when calculating the rounding equivalent.

doubleValue -

Returns:

the largest or smallest double that, when rounded to the specified number of digits, is equal to the specified double rounded to the same number of digits.

countSigFigs

public static int countSigFigs(String valueString,
                               Locale locale)

Returns the number of significant figures that exist in the specified string representation of a floating point number.

Parameters:

valueString - the string that represents the floating point number.

Returns:

the number of significant figures that exist in the specified string representation of a floating point number.

doubleToString

public static String doubleToString(double doubleValue,
                                    int numDigits,
                                    Locale locale)

Returns a string representation of the specified double rounded to the specified number of digits. If possible, the string is returned in floating point format. Otherwise, the string is returned in exponential format.

Parameters:

doubleValue -

numDigits -

Returns:

String

doubleToString

public static String doubleToString(double doubleValue,
                                    Locale locale)

Returns a string representation of the specified double rounded to non-zero digits. If possible, the string is returned in floating point format. Otherwise, the string is returned in exponential format.

Parameters:

doubleValue -

Returns:

String

makeLegalString

public static String makeLegalString(String stringValue,
                                     Locale locale)

makeLegalString

public static String makeLegalString(String stringValue)