Appendable
public
interface
Appendable
java.lang.Appendable |
An object to which char
sequences and values can be appended. The
Appendable
interface must be implemented by any class whose
instances are intended to receive formatted output from a Formatter
.
The characters to be appended should be valid Unicode characters as
described in Unicode Character
Representation. Note that supplementary characters may be composed of
multiple 16-bit char
values.
Appendables are not necessarily safe for multithreaded access. Thread safety is the responsibility of classes that extend and implement this interface.
Since this interface may be implemented by existing classes with different styles of error handling there is no guarantee that errors will be propagated to the invoker.
Summary
Public methods | |
---|---|
abstract
Appendable
|
append(char c)
Appends the specified character to this |
abstract
Appendable
|
append(CharSequence csq, int start, int end)
Appends a subsequence of the specified character sequence to this
|
abstract
Appendable
|
append(CharSequence csq)
Appends the specified character sequence to this |
Public methods
append
public abstract Appendable append (char c)
Appends the specified character to this Appendable
.
Parameters | |
---|---|
c |
char : The character to append |
Returns | |
---|---|
Appendable |
A reference to this Appendable |
Throws | |
---|---|
IOException |
If an I/O error occurs |
append
public abstract Appendable append (CharSequence csq, int start, int end)
Appends a subsequence of the specified character sequence to this
Appendable
.
An invocation of this method of the form out.append(csq, start, end)
when csq
is not null
, behaves in
exactly the same way as the invocation
out.append(csq.subSequence(start, end))
Parameters | |
---|---|
csq |
CharSequence : The character sequence from which a subsequence will be
appended. If csq is null , then characters
will be appended as if csq contained the four
characters "null" . |
start |
int : The index of the first character in the subsequence |
end |
int : The index of the character following the last character in the
subsequence |
Returns | |
---|---|
Appendable |
A reference to this Appendable |
Throws | |
---|---|
IndexOutOfBoundsException |
If start or end are negative, start
is greater than end , or end is greater than
csq.length() |
IOException |
If an I/O error occurs |
append
public abstract Appendable append (CharSequence csq)
Appends the specified character sequence to this Appendable
.
Depending on which class implements the character sequence
csq
, the entire sequence may not be appended. For
instance, if csq
is a CharBuffer
then
the subsequence to append is defined by the buffer's position and limit.
Parameters | |
---|---|
csq |
CharSequence : The character sequence to append. If csq is
null , then the four characters "null" are
appended to this Appendable. |
Returns | |
---|---|
Appendable |
A reference to this Appendable |
Throws | |
---|---|
IOException |
If an I/O error occurs |