org.apache.commons.math3.complex
Class ComplexFormat

java.lang.Object
  extended by org.apache.commons.math3.complex.ComplexFormat

public class ComplexFormat
extends Object

Formats a Complex number in cartesian format "Re(c) + Im(c)i". 'i' can be replaced with 'j' (or anything else), and the number format for both real and imaginary parts can be configured.

Version:
$Id: ComplexFormat.java 1416643 2012-12-03 19:37:14Z tn $

Constructor Summary
ComplexFormat()
          Create an instance with the default imaginary character, 'i', and the default number format for both real and imaginary parts.
ComplexFormat(NumberFormat format)
          Create an instance with a custom number format for both real and imaginary parts.
ComplexFormat(NumberFormat realFormat, NumberFormat imaginaryFormat)
          Create an instance with a custom number format for the real part and a custom number format for the imaginary part.
ComplexFormat(String imaginaryCharacter)
          Create an instance with a custom imaginary character, and the default number format for both real and imaginary parts.
ComplexFormat(String imaginaryCharacter, NumberFormat format)
          Create an instance with a custom imaginary character, and a custom number format for both real and imaginary parts.
ComplexFormat(String imaginaryCharacter, NumberFormat realFormat, NumberFormat imaginaryFormat)
          Create an instance with a custom imaginary character, a custom number format for the real part, and a custom number format for the imaginary part.
 
Method Summary
 String format(Complex c)
          This method calls format(Object,StringBuffer,FieldPosition).
 StringBuffer format(Complex complex, StringBuffer toAppendTo, FieldPosition pos)
          Formats a Complex object to produce a string.
 String format(Double c)
          This method calls format(Object,StringBuffer,FieldPosition).
 StringBuffer format(Object obj, StringBuffer toAppendTo, FieldPosition pos)
          Formats a object to produce a string.
static Locale[] getAvailableLocales()
          Get the set of locales for which complex formats are available.
 String getImaginaryCharacter()
          Access the imaginaryCharacter.
 NumberFormat getImaginaryFormat()
          Access the imaginaryFormat.
static ComplexFormat getInstance()
          Returns the default complex format for the current locale.
static ComplexFormat getInstance(Locale locale)
          Returns the default complex format for the given locale.
static ComplexFormat getInstance(String imaginaryCharacter, Locale locale)
          Returns the default complex format for the given locale.
 NumberFormat getRealFormat()
          Access the realFormat.
 Complex parse(String source)
          Parses a string to produce a Complex object.
 Complex parse(String source, ParsePosition pos)
          Parses a string to produce a Complex object.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ComplexFormat

public ComplexFormat()
Create an instance with the default imaginary character, 'i', and the default number format for both real and imaginary parts.


ComplexFormat

public ComplexFormat(NumberFormat format)
              throws NullArgumentException
Create an instance with a custom number format for both real and imaginary parts.

Parameters:
format - the custom format for both real and imaginary parts.
Throws:
NullArgumentException - if realFormat is null.

ComplexFormat

public ComplexFormat(NumberFormat realFormat,
                     NumberFormat imaginaryFormat)
              throws NullArgumentException
Create an instance with a custom number format for the real part and a custom number format for the imaginary part.

Parameters:
realFormat - the custom format for the real part.
imaginaryFormat - the custom format for the imaginary part.
Throws:
NullArgumentException - if imaginaryFormat is null.
NullArgumentException - if realFormat is null.

ComplexFormat

public ComplexFormat(String imaginaryCharacter)
              throws NullArgumentException,
                     NoDataException
Create an instance with a custom imaginary character, and the default number format for both real and imaginary parts.

Parameters:
imaginaryCharacter - The custom imaginary character.
Throws:
NullArgumentException - if imaginaryCharacter is null.
NoDataException - if imaginaryCharacter is an empty string.

ComplexFormat

public ComplexFormat(String imaginaryCharacter,
                     NumberFormat format)
              throws NullArgumentException,
                     NoDataException
Create an instance with a custom imaginary character, and a custom number format for both real and imaginary parts.

Parameters:
imaginaryCharacter - The custom imaginary character.
format - the custom format for both real and imaginary parts.
Throws:
NullArgumentException - if imaginaryCharacter is null.
NoDataException - if imaginaryCharacter is an empty string.
NullArgumentException - if format is null.

ComplexFormat

public ComplexFormat(String imaginaryCharacter,
                     NumberFormat realFormat,
                     NumberFormat imaginaryFormat)
              throws NullArgumentException,
                     NoDataException
Create an instance with a custom imaginary character, a custom number format for the real part, and a custom number format for the imaginary part.

Parameters:
imaginaryCharacter - The custom imaginary character.
realFormat - the custom format for the real part.
imaginaryFormat - the custom format for the imaginary part.
Throws:
NullArgumentException - if imaginaryCharacter is null.
NoDataException - if imaginaryCharacter is an empty string.
NullArgumentException - if imaginaryFormat is null.
NullArgumentException - if realFormat is null.
Method Detail

getAvailableLocales

public static Locale[] getAvailableLocales()
Get the set of locales for which complex formats are available.

This is the same set as the NumberFormat set.

Returns:
available complex format locales.

format

public String format(Complex c)
This method calls format(Object,StringBuffer,FieldPosition).

Parameters:
c - Complex object to format.
Returns:
A formatted number in the form "Re(c) + Im(c)i".

format

public String format(Double c)
This method calls format(Object,StringBuffer,FieldPosition).

Parameters:
c - Double object to format.
Returns:
A formatted number.

format

public StringBuffer format(Complex complex,
                           StringBuffer toAppendTo,
                           FieldPosition pos)
Formats a Complex object to produce a string.

Parameters:
complex - the object to format.
toAppendTo - where the text is to be appended
pos - On input: an alignment field, if desired. On output: the offsets of the alignment field
Returns:
the value passed in as toAppendTo.

format

public StringBuffer format(Object obj,
                           StringBuffer toAppendTo,
                           FieldPosition pos)
                    throws MathIllegalArgumentException
Formats a object to produce a string. obj must be either a Complex object or a Number object. Any other type of object will result in an IllegalArgumentException being thrown.

Parameters:
obj - the object to format.
toAppendTo - where the text is to be appended
pos - On input: an alignment field, if desired. On output: the offsets of the alignment field
Returns:
the value passed in as toAppendTo.
Throws:
MathIllegalArgumentException - is obj is not a valid type.
See Also:
Format.format(java.lang.Object, java.lang.StringBuffer, java.text.FieldPosition)

getImaginaryCharacter

public String getImaginaryCharacter()
Access the imaginaryCharacter.

Returns:
the imaginaryCharacter.

getImaginaryFormat

public NumberFormat getImaginaryFormat()
Access the imaginaryFormat.

Returns:
the imaginaryFormat.

getInstance

public static ComplexFormat getInstance()
Returns the default complex format for the current locale.

Returns:
the default complex format.

getInstance

public static ComplexFormat getInstance(Locale locale)
Returns the default complex format for the given locale.

Parameters:
locale - the specific locale used by the format.
Returns:
the complex format specific to the given locale.

getInstance

public static ComplexFormat getInstance(String imaginaryCharacter,
                                        Locale locale)
                                 throws NullArgumentException,
                                        NoDataException
Returns the default complex format for the given locale.

Parameters:
locale - the specific locale used by the format.
imaginaryCharacter - Imaginary character.
Returns:
the complex format specific to the given locale.
Throws:
NullArgumentException - if imaginaryCharacter is null.
NoDataException - if imaginaryCharacter is an empty string.

getRealFormat

public NumberFormat getRealFormat()
Access the realFormat.

Returns:
the realFormat.

parse

public Complex parse(String source)
              throws MathParseException
Parses a string to produce a Complex object.

Parameters:
source - the string to parse.
Returns:
the parsed Complex object.
Throws:
MathParseException - if the beginning of the specified string cannot be parsed.

parse

public Complex parse(String source,
                     ParsePosition pos)
Parses a string to produce a Complex object.

Parameters:
source - the string to parse
pos - input/ouput parsing parameter.
Returns:
the parsed Complex object.


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