Added in API level 1

FieldPosition

public class FieldPosition
extends Object

java.lang.Object
   ↳ java.text.FieldPosition


FieldPosition is a simple class used by Format and its subclasses to identify fields in formatted output. Fields can be identified in two ways:

  • By an integer constant, whose names typically end with _FIELD. The constants are defined in the various subclasses of Format.
  • By a 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.

See also:

Summary

Public constructors

FieldPosition(int field)

Creates a FieldPosition object for the given field.

FieldPosition(Format.Field attribute)

Creates a FieldPosition object for the given field constant.

FieldPosition(Format.Field attribute, int fieldID)

Creates a FieldPosition object for the given field.

Public methods

boolean equals(Object obj)

Overrides equals

int getBeginIndex()

Retrieves the index of the first character in the requested field.

int getEndIndex()

Retrieves the index of the character following the last character in the requested field.

int getField()

Retrieves the field identifier.

Format.Field getFieldAttribute()

Returns the field identifier as an attribute constant from one of the Field subclasses.

int hashCode()

Returns a hash code for this FieldPosition.

void setBeginIndex(int bi)

Sets the begin index.

void setEndIndex(int ei)

Sets the end index.

String toString()

Return a string representation of this FieldPosition.

Inherited methods

Public constructors

FieldPosition

Added in API level 1
public FieldPosition (int field)

Creates a FieldPosition object for the given field. Fields are identified by constants, whose names typically end with _FIELD, in the various subclasses of Format.

Parameters
field int: the field identifier

FieldPosition

Added in API level 1
public FieldPosition (Format.Field attribute)

Creates a FieldPosition object for the given field constant. Fields are identified by constants defined in the various Format subclasses. This is equivalent to calling new FieldPosition(attribute, -1).

Parameters
attribute Format.Field: Format.Field constant identifying a field

FieldPosition

Added in API level 1
public FieldPosition (Format.Field attribute, 
                int fieldID)

Creates a FieldPosition object for the given field. The field is identified by an attribute constant from one of the Field subclasses as well as an integer field ID defined by the Format subclasses. Format subclasses that are aware of Field should give precedence to attribute and ignore fieldID if attribute is not null. However, older Format subclasses may not be aware of Field and rely on fieldID. If the field has no corresponding integer constant, fieldID should be -1.

Parameters
attribute Format.Field: Format.Field constant identifying a field

fieldID int: integer constant identifying a field

Public methods

equals

Added in API level 1
public boolean equals (Object obj)

Overrides equals

Parameters
obj Object: the reference object with which to compare.

Returns
boolean true if this object is the same as the obj argument; false otherwise.

getBeginIndex

Added in API level 1
public int getBeginIndex ()

Retrieves the index of the first character in the requested field.

Returns
int the begin index

getEndIndex

Added in API level 1
public int getEndIndex ()

Retrieves the index of the character following the last character in the requested field.

Returns
int the end index

getField

Added in API level 1
public int getField ()

Retrieves the field identifier.

Returns
int the field identifier

getFieldAttribute

Added in API level 1
public Format.Field getFieldAttribute ()

Returns the field identifier as an attribute constant from one of the Field subclasses. May return null if the field is specified only by an integer field ID.

Returns
Format.Field Identifier for the field

hashCode

Added in API level 1
public int hashCode ()

Returns a hash code for this FieldPosition.

Returns
int a hash code value for this object

setBeginIndex

Added in API level 1
public void setBeginIndex (int bi)

Sets the begin index. For use by subclasses of Format.

Parameters
bi int: the begin index

setEndIndex

Added in API level 1
public void setEndIndex (int ei)

Sets the end index. For use by subclasses of Format.

Parameters
ei int: the end index

toString

Added in API level 1
public String toString ()

Return a string representation of this FieldPosition.

Returns
String a string representation of this object