BufferedWriter
, CharArrayWriter
, CharBuffer
, FileWriter
, FilterWriter
, LogStream
, OutputStreamWriter
, PipedWriter
, PrintStream
, PrintWriter
, StringBuffer
, StringBuilder
, StringWriter
, Writer
public interface Appendable
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.
Modifier and Type | Method | Description |
---|---|---|
Appendable |
append |
Appends the specified character to this Appendable . |
Appendable |
append |
Appends the specified character sequence to this Appendable . |
Appendable |
append |
Appends a subsequence of the specified character sequence to this Appendable . |
Appendable append(CharSequence csq) throws IOException
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.
csq
- The character sequence to append. If csq
is null
, then the four characters "null"
are appended to this Appendable.Appendable
IOException
- If an I/O error occursAppendable append(CharSequence csq, int start, int end) throws IOException
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))
csq
- 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
- The index of the first character in the subsequenceend
- The index of the character following the last character in the subsequenceAppendable
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 occursAppendable append(char c) throws IOException
Appendable
.c
- The character to appendAppendable
IOException
- If an I/O error occurs
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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
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https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/lang/Appendable.html