| Java 1.1 | cloneable serializable |
This is the concrete
Format class used by
NumberFormat for all locales that use base 10
numbers. Most applications do not need to use this class directly;
they can use the static methods of NumberFormat to
obtain a default NumberFormat object for a desired
locale and then perform minor locale-independent customizations on
that object.Applications that require highly customized number formatting and
parsing may create custom DecimalFormat objects by
passing a suitable pattern to the DecimalFormat( )
constructor method. The applyPattern( )
method can change this pattern. A pattern consists of a string of
characters from the table below. For example:"$#,##0.00;($#,##0.00)"
Character |
Meaning |
|---|
# |
A digit; zeros show as absent. |
0 |
A digit; zeros show as 0. |
. |
The locale-specific decimal separator. |
, |
The locale-specific grouping separator (comma). |
- |
The locale-specific negative prefix. |
% |
Shows value as a percentage. |
; |
Separates positive number format (on left) from optiona negative
number format (on right). |
' |
Quotes a reserved character, so it appears literally in the output
(apostrophe). |
other |
Appears literally in output. | A DecimalFormatSymbols object can be specified
optionally when creating a DecimalFormat object.
If one is not specified, a DecimalFormatSymbols
object suitable for the default locale is used.In Java 5.0, DecimalFormat can return
java.math.BigDecimal values from its
parse( ) method. Call setParseBigDecimal(
) to enable this feature. This is useful when working with
very large numbers, very precise numbers, or financial applications
that use BigDecimal to avoid rounding errors.
Figure 15-9. java.text.DecimalFormat
 public class DecimalFormat extends NumberFormat {
// Public Constructors
public DecimalFormat ( );
public DecimalFormat (String pattern );
public DecimalFormat (String pattern , DecimalFormatSymbols symbols );
// Public Instance Methods
public void applyLocalizedPattern (String pattern );
public void applyPattern (String pattern );
public DecimalFormatSymbols getDecimalFormatSymbols ( );
public int getGroupingSize ( ); default:3
public int getMultiplier ( ); default:1
public String getNegativePrefix ( ); default:"-"
public String getNegativeSuffix ( ); default:"
public String getPositivePrefix ( ); default:"
public String getPositiveSuffix ( ); default:"
public boolean isDecimalSeparatorAlwaysShown ( ); default:false
5.0 public boolean isParseBigDecimal ( ); default:false
public void setDecimalFormatSymbols (DecimalFormatSymbols newSymbols );
public void setDecimalSeparatorAlwaysShown (boolean newValue );
public void setGroupingSize (int newValue );
public void setMultiplier (int newValue );
public void setNegativePrefix (String newValue );
public void setNegativeSuffix (String newValue );
5.0 public void setParseBigDecimal (boolean newValue );
public void setPositivePrefix (String newValue );
public void setPositiveSuffix (String newValue );
public String toLocalizedPattern ( );
public String toPattern ( );
// Public Methods Overriding NumberFormat
public Object clone ( );
public boolean equals (Object obj );
5.0 public final StringBuffer format (Object number , StringBuffer toAppendTo ,
FieldPosition pos );
public StringBuffer format (double number , StringBuffer result ,
FieldPosition fieldPosition );
public StringBuffer format (long number , StringBuffer result ,
FieldPosition fieldPosition );
1.4 public java.util.Currency getCurrency ( );
5.0 public int getMaximumFractionDigits ( ); default:3
5.0 public int getMaximumIntegerDigits ( ); default:2147483647
5.0 public int getMinimumFractionDigits ( ); default:0
5.0 public int getMinimumIntegerDigits ( ); default:1
public int hashCode ( );
public Number parse (String text , ParsePosition pos );
1.4 public void setCurrency (java.util.Currency currency );
1.2 public void setMaximumFractionDigits (int newValue );
1.2 public void setMaximumIntegerDigits (int newValue );
1.2 public void setMinimumFractionDigits (int newValue );
1.2 public void setMinimumIntegerDigits (int newValue );
// Public Methods Overriding Format
1.4 public AttributedCharacterIterator formatToCharacterIterator (Object obj );
}
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