- All Known Implementing Classes:
BufferedWriter
,CharArrayWriter
,CharBuffer
,FileWriter
,FilterWriter
,LogStream
,OutputStreamWriter
,PipedWriter
,PrintStream
,PrintWriter
,StringBuffer
,StringBuilder
,StringWriter
,Writer
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.
- Since:
- 1.5
-
Method Summary
Modifier and TypeMethodDescriptionappend
(char c) Appends the specified character to thisAppendable
.append
(CharSequence csq) Appends the specified character sequence to thisAppendable
.append
(CharSequence csq, int start, int end) Appends a subsequence of the specified character sequence to thisAppendable
.
-
Method Details
-
append
Appends the specified character sequence to thisAppendable
.Depending on which class implements the character sequence
csq
, the entire sequence may not be appended. For instance, ifcsq
is aCharBuffer
then the subsequence to append is defined by the buffer's position and limit.The contents of this
Appendable
are unspecified if theCharSequence
is modified during the method call or an exception is thrown when accessing theCharSequence
.- Parameters:
csq
- The character sequence to append. Ifcsq
isnull
, then the four characters"null"
are appended to this Appendable.- Returns:
- A reference to this
Appendable
- Throws:
IOException
- If an I/O error occurs
-
append
Appends a subsequence of the specified character sequence to thisAppendable
.An invocation of this method of the form
out.append(csq, start, end)
whencsq
is notnull
, behaves in exactly the same way as the invocationout.append(csq.subSequence(start, end))
The contents of this
Appendable
are unspecified if theCharSequence
is modified during the method call or an exception is thrown when accessing theCharSequence
.- Parameters:
csq
- The character sequence from which a subsequence will be appended. Ifcsq
isnull
, then characters will be appended as ifcsq
contained the four characters"null"
.start
- The index of the first character in the subsequenceend
- The index of the character following the last character in the subsequence- Returns:
- A reference to this
Appendable
- Throws:
IndexOutOfBoundsException
- Ifstart
orend
are negative,start
is greater thanend
, orend
is greater thancsq.length()
IOException
- If an I/O error occurs
-
append
Appends the specified character to thisAppendable
.- Parameters:
c
- The character to append- Returns:
- A reference to this
Appendable
- Throws:
IOException
- If an I/O error occurs
-