FieldPosition objects
are optionally passed to the format( ) methods of
the Format class and its subclasses to return
information about the start and end positions of a specific part or
"field" of the formatted string.
This kind of information is often useful for aligning formatted
strings in columnsfor example, aligning the decimal points in
a column of numbers.The field of interest is specified when the FieldPosition(
) constructor is called. The
NumberFormat and DateFormat
classes define integer various constants (which end with the string
_FIELD) that can be used here. In Java 1.4 and
later you can also construct a FieldPosition by
specifying the Format.Field object that identifies
the field. (For constant Field instances, see
DateFormat.Field,
MessageFormat.Field and
NumberFormat.Field.)After a FieldPosition has been created and passed
to a format( ) method, use
getBeginIndex(
) and getEndIndex( ) methods of this
class to obtain the starting and ending character positions of the
desired field of the formatted string.public class FieldPosition {
// Public Constructors
1.4 public FieldPosition (Format.Field attribute );
public FieldPosition (int field );
1.4 public FieldPosition (Format.Field attribute , int fieldID );
// Public Instance Methods
public int getBeginIndex ( );
public int getEndIndex ( );
public int getField ( );
1.4 public Format.Field getFieldAttribute ( );
1.2 public void setBeginIndex (int bi );
1.2 public void setEndIndex (int ei );
// Public Methods Overriding Object
1.2 public boolean equals (Object obj );
1.2 public int hashCode ( );
1.2 public String toString ( );
}
Passed To
ChoiceFormat.format( ),
DateFormat.format( ),
DecimalFormat.format( ), Format.format(
), MessageFormat.format( ),
NumberFormat.format( ),
SimpleDateFormat.format( ) |
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