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JavaTM 2 Platform Std. Ed. v1.5.0
java.text
|
Nested Class Summary | |
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static class |
NumberFormat.Field
Defines constants that are used as attribute keys in the AttributedCharacterIterator returned
from NumberFormat.formatToCharacterIterator and as
field identifiers in FieldPosition . |
Field Summary | |
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static int |
FRACTION_FIELD
Field constant used to construct a FieldPosition object. |
static int |
INTEGER_FIELD
Field constant used to construct a FieldPosition object. |
Constructor Summary | |
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NumberFormat()
|
Method Summary | |
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Object |
clone()
Overrides Cloneable |
boolean |
equals(Object obj)
Overrides equals |
String |
format(double number)
Specialization of format. |
abstract StringBuffer |
format(double number,
StringBuffer toAppendTo,
FieldPosition pos)
Specialization of format. |
String |
format(long number)
Specialization of format. |
abstract StringBuffer |
format(long number,
StringBuffer toAppendTo,
FieldPosition pos)
Specialization of format. |
StringBuffer |
format(Object number,
StringBuffer toAppendTo,
FieldPosition pos)
Formats a number and appends the resulting text to the given string buffer. |
static Locale[] |
getAvailableLocales()
Returns an array of all locales for which the get*Instance methods of this class can return
localized instances. |
Currency |
getCurrency()
Gets the currency used by this number format when formatting currency values. |
static NumberFormat |
getCurrencyInstance()
Returns a currency format for the current default locale. |
static NumberFormat |
getCurrencyInstance(Locale inLocale)
Returns a currency format for the specified locale. |
static NumberFormat |
getInstance()
Returns a general-purpose number format for the current default locale. |
static NumberFormat |
getInstance(Locale inLocale)
Returns a general-purpose number format for the specified locale. |
static NumberFormat |
getIntegerInstance()
Returns an integer number format for the current default locale. |
static NumberFormat |
getIntegerInstance(Locale inLocale)
Returns an integer number format for the specified locale. |
int |
getMaximumFractionDigits()
Returns the maximum number of digits allowed in the fraction portion of a number. |
int |
getMaximumIntegerDigits()
Returns the maximum number of digits allowed in the integer portion of a number. |
int |
getMinimumFractionDigits()
Returns the minimum number of digits allowed in the fraction portion of a number. |
int |
getMinimumIntegerDigits()
Returns the minimum number of digits allowed in the integer portion of a number. |
static NumberFormat |
getNumberInstance()
Returns a general-purpose number format for the current default locale. |
static NumberFormat |
getNumberInstance(Locale inLocale)
Returns a general-purpose number format for the specified locale. |
static NumberFormat |
getPercentInstance()
Returns a percentage format for the current default locale. |
static NumberFormat |
getPercentInstance(Locale inLocale)
Returns a percentage format for the specified locale. |
int |
hashCode()
Overrides hashCode |
boolean |
isGroupingUsed()
Returns true if grouping is used in this format. |
boolean |
isParseIntegerOnly()
Returns true if this format will parse numbers as integers only. |
Number |
parse(String source)
Parses text from the beginning of the given string to produce a number. |
abstract Number |
parse(String source,
ParsePosition parsePosition)
Returns a Long if possible (e.g., within the range [Long.MIN_VALUE, Long.MAX_VALUE] and with no decimals), otherwise a Double. |
Object |
parseObject(String source,
ParsePosition pos)
Parses text from a string to produce a Number . |
void |
setCurrency(Currency currency)
Sets the currency used by this number format when formatting currency values. |
void |
setGroupingUsed(boolean newValue)
Set whether or not grouping will be used in this format. |
void |
setMaximumFractionDigits(int newValue)
Sets the maximum number of digits allowed in the fraction portion of a number. |
void |
setMaximumIntegerDigits(int newValue)
Sets the maximum number of digits allowed in the integer portion of a number. |
void |
setMinimumFractionDigits(int newValue)
Sets the minimum number of digits allowed in the fraction portion of a number. |
void |
setMinimumIntegerDigits(int newValue)
Sets the minimum number of digits allowed in the integer portion of a number. |
void |
setParseIntegerOnly(boolean value)
Sets whether or not numbers should be parsed as integers only. |
Methods inherited from class java.text.Format |
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format, formatToCharacterIterator, parseObject |
Methods inherited from class java.lang.Object |
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finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final int INTEGER_FIELD
FieldPosition
,
Constant Field Valuespublic static final int FRACTION_FIELD
FieldPosition
,
Constant Field ValuesConstructor Detail |
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public NumberFormat()
Method Detail |
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public StringBuffer format(Object number, StringBuffer toAppendTo, FieldPosition pos)
Number
.
This implementation extracts the number's value using
Number.longValue()
for all integral type values that
can be converted to long
without loss of information,
including BigInteger
values with a
bit length
of less than 64,
and Number.doubleValue()
for all other types. It
then calls
format(long,java.lang.StringBuffer,java.text.FieldPosition)
or format(double,java.lang.StringBuffer,java.text.FieldPosition)
.
This may result in loss of magnitude information and precision for
BigInteger
and BigDecimal
values.
number
- the number to formattoAppendTo
- the StringBuffer
to which the formatted
text is to be appendedpos
- On input: an alignment field, if desired.
On output: the offsets of the alignment field.
toAppendTo
IllegalArgumentException
- if number
is
null or not an instance of Number
.
NullPointerException
- if toAppendTo
or
pos
is nullFieldPosition
public final Object parseObject(String source, ParsePosition pos)
Number
.
The method attempts to parse text starting at the index given by
pos
.
If parsing succeeds, then the index of pos
is updated
to the index after the last character used (parsing does not necessarily
use all characters up to the end of the string), and the parsed
number is returned. The updated pos
can be used to
indicate the starting point for the next call to this method.
If an error occurs, then the index of pos
is not
changed, the error index of pos
is set to the index of
the character where the error occurred, and null is returned.
See the parse(String, ParsePosition)
method for more information
on number parsing.
parseObject
in class Format
source
- A String
, part of which should be parsed.pos
- A ParsePosition
object with index and error
index information as described above.
Number
parsed from the string. In case of
error, returns null.
NullPointerException
- if pos
is null.public final String format(double number)
Format.format(java.lang.Object)
public final String format(long number)
Format.format(java.lang.Object)
public abstract StringBuffer format(double number, StringBuffer toAppendTo, FieldPosition pos)
Format.format(java.lang.Object)
public abstract StringBuffer format(long number, StringBuffer toAppendTo, FieldPosition pos)
Format.format(java.lang.Object)
public abstract Number parse(String source, ParsePosition parsePosition)
public Number parse(String source) throws ParseException
See the parse(String, ParsePosition)
method for more information
on number parsing.
source
- A String
whose beginning should be parsed.
Number
parsed from the string.
ParseException
- if the beginning of the specified string
cannot be parsed.public boolean isParseIntegerOnly()
public void setParseIntegerOnly(boolean value)
isParseIntegerOnly()
public static final NumberFormat getInstance()
getNumberInstance()
.
public static NumberFormat getInstance(Locale inLocale)
getNumberInstance(inLocale)
.
public static final NumberFormat getNumberInstance()
public static NumberFormat getNumberInstance(Locale inLocale)
public static final NumberFormat getIntegerInstance()
ROUND_HALF_EVEN
) for formatting,
and to parse only the integer part of an input string (see isParseIntegerOnly
).
public static NumberFormat getIntegerInstance(Locale inLocale)
ROUND_HALF_EVEN
) for formatting,
and to parse only the integer part of an input string (see isParseIntegerOnly
).
inLocale
- the locale for which a number format is needed
public static final NumberFormat getCurrencyInstance()
public static NumberFormat getCurrencyInstance(Locale inLocale)
public static final NumberFormat getPercentInstance()
public static NumberFormat getPercentInstance(Locale inLocale)
public static Locale[] getAvailableLocales()
get*Instance
methods of this class can return
localized instances.
The array returned must contain at least a Locale
instance equal to Locale.US
.
NumberFormat
instances are available.public int hashCode()
Object.equals(java.lang.Object)
,
Hashtable
public boolean equals(Object obj)
obj
- the reference object with which to compare.
true
if this object is the same as the obj
argument; false
otherwise.Object.hashCode()
,
Hashtable
public Object clone()
Cloneable
public boolean isGroupingUsed()
setGroupingUsed(boolean)
public void setGroupingUsed(boolean newValue)
isGroupingUsed()
public int getMaximumIntegerDigits()
setMaximumIntegerDigits(int)
public void setMaximumIntegerDigits(int newValue)
newValue
- the maximum number of integer digits to be shown; if
less than zero, then zero is used. The concrete subclass may enforce an
upper limit to this value appropriate to the numeric type being formatted.getMaximumIntegerDigits()
public int getMinimumIntegerDigits()
setMinimumIntegerDigits(int)
public void setMinimumIntegerDigits(int newValue)
newValue
- the minimum number of integer digits to be shown; if
less than zero, then zero is used. The concrete subclass may enforce an
upper limit to this value appropriate to the numeric type being formatted.getMinimumIntegerDigits()
public int getMaximumFractionDigits()
setMaximumFractionDigits(int)
public void setMaximumFractionDigits(int newValue)
newValue
- the maximum number of fraction digits to be shown; if
less than zero, then zero is used. The concrete subclass may enforce an
upper limit to this value appropriate to the numeric type being formatted.getMaximumFractionDigits()
public int getMinimumFractionDigits()
setMinimumFractionDigits(int)
public void setMinimumFractionDigits(int newValue)
newValue
- the minimum number of fraction digits to be shown; if
less than zero, then zero is used. The concrete subclass may enforce an
upper limit to this value appropriate to the numeric type being formatted.getMinimumFractionDigits()
public Currency getCurrency()
setCurrency
.
The default implementation throws
UnsupportedOperationException
.
null
UnsupportedOperationException
- if the number format class
doesn't implement currency formattingpublic void setCurrency(Currency currency)
The default implementation throws
UnsupportedOperationException
.
currency
- the new currency to be used by this number format
UnsupportedOperationException
- if the number format class
doesn't implement currency formatting
NullPointerException
- if currency
is null