FieldPosition
is a simple class used by Format
and its subclasses to identify fields in formatted output. Fields can be identified in two ways: _FIELD
. The constants are defined in the various subclasses of Format
. Format.Field
constant, see ERA_FIELD
and its friends in DateFormat
for an example. FieldPosition
keeps track of the position of the field within the formatted output with two indices: the index of the first character of the field and the index of the last character of the field.
One version of the format
method in the various Format
classes requires a FieldPosition
object as an argument. You use this format
method to perform partial formatting or to get information about the formatted output (such as the position of a field).
If you are interested in the positions of all attributes in the formatted string use the Format
method formatToCharacterIterator
.
@version 1.22 11/17/05
@author Mark Davis
@see java.text.Format
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