java.text
Interface CharacterIterator
- Cloneable
- AttributedCharacterIterator
- Segment, StringCharacterIterator
This interface defines a mechanism for iterating over a range of
characters. For a given range of text, a beginning and ending index,
as well as a current index are defined. These values can be queried
by the methods in this interface. Additionally, various methods allow
the index to be set.
static char | DONE- This is a special constant value that is returned when the beginning or
end of the character range has been reached.
|
Object | clone()- This method creates a copy of this
CharacterIterator.
|
char | current()- This method returns the character at the current index position
|
char | first()- This method sets the index value to the beginning of the range and returns
the character there.
|
int | getBeginIndex()- This method returns the character position of the first character in the
range.
|
int | getEndIndex()- This method returns the character position of the end of the text range.
|
int | getIndex()- This method returns the current value of the index.
|
char | last()- This method sets the index value to
getEndIndex() - 1 and
returns the character there.
|
char | next()- This method increments the current index and then returns the character
at the new index value.
|
char | previous()- This method decrements the current index and then returns the character
at the new index value.
|
char | setIndex(int index)- This method sets the value of the index to the specified value, then
returns the character at that position.
|
DONE
public static final char DONE
This is a special constant value that is returned when the beginning or
end of the character range has been reached.
clone
public Object clone()
This method creates a copy of this CharacterIterator.
- clone in interface Object
- A copy of this
CharacterIterator.
current
public char current()
This method returns the character at the current index position
- The character at the current index position.
first
public char first()
This method sets the index value to the beginning of the range and returns
the character there.
- The character at the beginning of the range, or
DONE if
the range is empty.
getBeginIndex
public int getBeginIndex()
This method returns the character position of the first character in the
range.
- The index of the first character in the range.
getEndIndex
public int getEndIndex()
This method returns the character position of the end of the text range.
This will actually be the index of the first character following the
end of the range. In the event the text range is empty, this will be
equal to the first character in the range.
- The index of the end of the range.
getIndex
public int getIndex()
This method returns the current value of the index.
last
public char last()
This method sets the index value to getEndIndex() - 1 and
returns the character there. If the range is empty, then the index value
will be set equal to the beginning index.
- The character at the end of the range, or
DONE if the
range is empty.
next
public char next()
This method increments the current index and then returns the character
at the new index value. If the index is already at
getEndIndex() - 1, it will not be incremented.
- The character at the position of the incremented index value,
or
DONE if the index has reached getEndIndex() - 1
previous
public char previous()
This method decrements the current index and then returns the character
at the new index value. If the index value is already at the beginning
index, it will not be decremented.
- The character at the position of the decremented index value,
or
DONE if index was already equal to the beginning index
value.
setIndex
public char setIndex(int index)
throws IllegalArgumentException This method sets the value of the index to the specified value, then
returns the character at that position.
index - The new index value.
- The character at the new index value or
DONE if the index
value is equal to getEndIndex().
CharacterIterator.java -- Iterate over a character range
Copyright (C) 1998, 2001, 2005 Free Software Foundation, Inc.
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