org.apache.commons.math3.complex

Class ComplexFormat

java.lang.Object

org.apache.commons.math3.complex.ComplexFormat

public class ComplexFormat
extends java.lang.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.

Field Summary

Fields

Modifier and Type	Field and Description
private static java.lang.String	DEFAULT_IMAGINARY_CHARACTER The default imaginary character.
private java.lang.String	imaginaryCharacter The notation used to signify the imaginary part of the complex number.
private java.text.NumberFormat	imaginaryFormat The format used for the imaginary part.
private java.text.NumberFormat	realFormat The format used for the real part.

Constructor Summary

Constructors

Constructor and Description
ComplexFormat() Create an instance with the default imaginary character, 'i', and the default number format for both real and imaginary parts.
ComplexFormat(java.text.NumberFormat format) Create an instance with a custom number format for both real and imaginary parts.
ComplexFormat(java.text.NumberFormat realFormat, java.text.NumberFormat imaginaryFormat) Create an instance with a custom number format for the real part and a custom number format for the imaginary part.
ComplexFormat(java.lang.String imaginaryCharacter) Create an instance with a custom imaginary character, and the default number format for both real and imaginary parts.
ComplexFormat(java.lang.String imaginaryCharacter, java.text.NumberFormat format) Create an instance with a custom imaginary character, and a custom number format for both real and imaginary parts.
ComplexFormat(java.lang.String imaginaryCharacter, java.text.NumberFormat realFormat, java.text.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

Methods

Modifier and Type	Method and Description
java.lang.String	format(Complex c) This method calls format(Object,StringBuffer,FieldPosition).
java.lang.StringBuffer	format(Complex complex, java.lang.StringBuffer toAppendTo, java.text.FieldPosition pos) Formats a Complex object to produce a string.
java.lang.String	format(java.lang.Double c) This method calls format(Object,StringBuffer,FieldPosition).
java.lang.StringBuffer	format(java.lang.Object obj, java.lang.StringBuffer toAppendTo, java.text.FieldPosition pos) Formats a object to produce a string.
private java.lang.StringBuffer	formatImaginary(double absIm, java.lang.StringBuffer toAppendTo, java.text.FieldPosition pos) Format the absolute value of the imaginary part.
static java.util.Locale[]	getAvailableLocales() Get the set of locales for which complex formats are available.
java.lang.String	getImaginaryCharacter() Access the imaginaryCharacter.
java.text.NumberFormat	getImaginaryFormat() Access the imaginaryFormat.
static ComplexFormat	getInstance() Returns the default complex format for the current locale.
static ComplexFormat	getInstance(java.util.Locale locale) Returns the default complex format for the given locale.
static ComplexFormat	getInstance(java.lang.String imaginaryCharacter, java.util.Locale locale) Returns the default complex format for the given locale.
java.text.NumberFormat	getRealFormat() Access the realFormat.
Complex	parse(java.lang.String source) Parses a string to produce a Complex object.
Complex	parse(java.lang.String source, java.text.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

Field Detail

DEFAULT_IMAGINARY_CHARACTER

private static final java.lang.String DEFAULT_IMAGINARY_CHARACTER

The default imaginary character.

See Also:

Constant Field Values

imaginaryCharacter

private final java.lang.String imaginaryCharacter

The notation used to signify the imaginary part of the complex number.

imaginaryFormat

private final java.text.NumberFormat imaginaryFormat

The format used for the imaginary part.

realFormat

private final java.text.NumberFormat realFormat

The format used for the real part.

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(java.text.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(java.text.NumberFormat realFormat,
             java.text.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(java.lang.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(java.lang.String imaginaryCharacter,
             java.text.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(java.lang.String imaginaryCharacter,
             java.text.NumberFormat realFormat,
             java.text.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 java.util.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 java.lang.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 java.lang.String format(java.lang.Double c)

This method calls format(Object,StringBuffer,FieldPosition).

Parameters:

c - Double object to format.

Returns:

A formatted number.

format

public java.lang.StringBuffer format(Complex complex,
                            java.lang.StringBuffer toAppendTo,
                            java.text.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.

formatImaginary

private java.lang.StringBuffer formatImaginary(double absIm,
                                     java.lang.StringBuffer toAppendTo,
                                     java.text.FieldPosition pos)

Format the absolute value of the imaginary part.

Parameters:

absIm - Absolute value of the imaginary part of a complex number.

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 java.lang.StringBuffer format(java.lang.Object obj,
                            java.lang.StringBuffer toAppendTo,
                            java.text.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 java.lang.String getImaginaryCharacter()

Access the imaginaryCharacter.

Returns:

the imaginaryCharacter.

getImaginaryFormat

public java.text.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(java.util.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(java.lang.String imaginaryCharacter,
                        java.util.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 java.text.NumberFormat getRealFormat()

Access the realFormat.

Returns:

the realFormat.

parse

public Complex parse(java.lang.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(java.lang.String source,
            java.text.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.