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Chapter 16 The java.text Package |
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Chapter 16 The java.text Package |
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java.text.CharacterIterator
java.lang.Cloneable
None
java.text.StringCharacterIterator
New as of JDK 1.1
The CharacterIterator interface defines methods that support bidirectional movement through a sequence of text. The interface is implemented by classes that maintain a current position in a sequence of characters. The interface provides methods for moving to the first, last, next, and previous characters in the sequence. The BreakIterator classes uses this interface to locate boundaries in textual sequences.
public abstract interface java.text.CharacterIterator
extends java.lang.Cloneable {
// Constants
public static final char DONE;
// Methods
public abstract Object clone();
public abstract char current();
public abstract char first();
public abstract int getBeginIndex();
public abstract int getEndIndex();
public abstract int getIndex();
public abstract char last();
public abstract char next();
public abstract char previous();
public abstract char setIndex(int position);
}
A constant that indicates that the beginning or end of the text has been reached. It can be returned by next() or previous().
A copy of this CharacterIterator.
Object.clone()
This method creates a copy of this CharacterIterator and returns it.
The character at the current position of this CharacterIterator or DONE if the current position is not within the text sequence.
This method returns the character at the current position of this CharacterIterator. The current position is returned by getIndex().
The first character in this CharacterIterator.
This method returns the character at the first position in this CharacterIterator. The first position is returned by getBeginIndex(). The current position of the iterator is set to this position.
The index of the first character in this CharacterIterator.
This method returns the index of the beginning of the text for this CharacterIterator.
The index after the last character in this CharacterIterator.
This method returns the index of the character following the end of the text for this CharacterIterator.
The index of the current character in this CharacterIterator.
This method returns the current position, or index, of this CharacterIterator.
The last character in this CharacterIterator.
This method returns the character at the ending position of this CharacterIterator. The last position is the value of getEndIndex()-1. The current position of the iterator is set to this position.
The next character in this CharacterIterator or DONE if the current position is already at the end of the text.
This method increments the current position of this CharacterIterator by one and returns the character at the new position. If the current position is already at getEndIndex(), the position is not changed, and DONE is returned.
The previous character in this CharacterIterator or DONE if the current position is already at the beginning of the text.
This method decrements the current position of this CharacterIterator by one and returns the character at the new position. If the current position is already at getBeginIndex(), the position is not changed, and DONE is returned.
The new position.
The character at the specified position in this CharacterIterator.
If the given position is not between getBeginIndex() and getEndIndex()-1.
This method sets the current position, or index, of this CharacterIterator to the given position.
BreakIterator, StringCharacterIterator
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