| java.lang.CharSequence
All known Subclasses: java.lang.AbstractStringBuilder,
| CharSequence | | public interface CharSequence (Code) | | A CharSequence is a readable sequence of char values. This
interface provides uniform, read-only access to many different kinds of
char sequences.
A char value represents a character in the Basic
Multilingual Plane (BMP) or a surrogate. Refer to Unicode Character Representation for details.
This interface does not refine the general contracts of the
java.lang.Object.equals(java.lang.Object) equals and
java.lang.Object.hashCode hashCode methods. The result of comparing two
objects that implement CharSequence is therefore, in general,
undefined. Each object may be implemented by a different class, and there
is no guarantee that each class will be capable of testing its instances
for equality with those of the other. It is therefore inappropriate to use
arbitrary CharSequence instances as elements in a set or as keys in
a map.
author:
Mike McCloskey
version:
1.15 07/05/05
since:
1.4 |
| Method Summary | |
| char | charAt(int index)
Returns the char value at the specified index. | | int | length()
Returns the length of this character sequence. | | CharSequence | subSequence(int start, int end)
Returns a new CharSequence that is a subsequence of this sequence.
The subsequence starts with the char value at the specified index and
ends with the char value at index end - 1. | | public String | toString()
Returns a string containing the characters in this sequence in the same
order as this sequence. |
| charAt | | char charAt(int index)(Code) | | Returns the char value at the specified index. An index ranges from zero
to length() - 1. The first char value of the sequence is at
index zero, the next at index one, and so on, as for array
indexing.
If the char value specified by the index is a
surrogate, the surrogate
value is returned.
Parameters:
index - the index of the char value to be returned the specified char value
throws:
IndexOutOfBoundsException - if the index argument is negative or not less thanlength() |
| length | | int length()(Code) | | Returns the length of this character sequence. The length is the number
of 16-bit chars in the sequence.
the number of chars in this sequence |
| subSequence | | CharSequence subSequence(int start, int end)(Code) | | Returns a new CharSequence that is a subsequence of this sequence.
The subsequence starts with the char value at the specified index and
ends with the char value at index end - 1. The length
(in chars) of the
returned sequence is end - start, so if start == end
then an empty sequence is returned.
Parameters:
start - the start index, inclusive
Parameters:
end - the end index, exclusive the specified subsequence
throws:
IndexOutOfBoundsException - if start or end are negative,if end is greater than length(),or if start is greater than end |
| toString | | public String toString()(Code) | | Returns a string containing the characters in this sequence in the same
order as this sequence. The length of the string will be the length of
this sequence.
a string consisting of exactly this sequence of characters |
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