java.lang
Interface CharSequence

All Known Implementing Classes:

StringBuffer

public interface CharSequence

The CharSequence interface represents an ordered set of characters and the functions to probe them.

Method Summary

char	charAt(int index) Answers the character at the specified index (0-based indexing).
int	length() Answers the number of characters in the sequence.
CharSequence	subSequence(int start, int end) Answers a CharSequence from the start index to the end index of this sequence.
java.lang.String	toString() Answers a String with the same characters and ordering of this CharSequence

Method Detail

length

public int length()

Answers the number of characters in the sequence.

Returns:

the number of charcters in the sequence

charAt

public char charAt(int index)

Answers the character at the specified index (0-based indexing).

Parameters:

index - - of the character to return

Returns:

character indicated by index

Throws:

IndexOutOfBoundsException - when index < 0 or index >= the length of the CharSequence

subSequence

public CharSequence subSequence(int start,
                                int end)

Answers a CharSequence from the start index to the end index of this sequence.

Parameters:

start - -- index of the start of the sub-sequence to return

end - -- index of the end of the sub-sequence to return

Returns:

the sub sequence from start to end

Throws:

IndexOutOfBoundsException - when 1. either index is below 0 2. either index >= this.length() 3. start > end

toString

public java.lang.String toString()

Answers a String with the same characters and ordering of this CharSequence

Returns:

a String based on the CharSequence