Closeable
, Flushable
, Appendable
, AutoCloseable
public class CharArrayWriter extends Writer
Note: Invoking close() on this class has no effect, and methods of this class can be called after the stream has closed without generating an IOException.
Modifier and Type | Field | Description |
---|---|---|
protected char[] |
buf |
The buffer where data is stored.
|
protected int |
count |
The number of chars in the buffer.
|
Constructor | Description |
---|---|
CharArrayWriter() |
Creates a new CharArrayWriter.
|
CharArrayWriter(int initialSize) |
Creates a new CharArrayWriter with the specified initial size.
|
Modifier and Type | Method | Description |
---|---|---|
CharArrayWriter |
append(char c) |
Appends the specified character to this writer.
|
CharArrayWriter |
append(CharSequence csq) |
Appends the specified character sequence to this writer.
|
CharArrayWriter |
append(CharSequence csq,
int start,
int end) |
Appends a subsequence of the specified character sequence to this writer.
|
void |
close() |
Close the stream.
|
void |
flush() |
Flush the stream.
|
void |
reset() |
Resets the buffer so that you can use it again without
throwing away the already allocated buffer.
|
int |
size() |
Returns the current size of the buffer.
|
char[] |
toCharArray() |
Returns a copy of the input data.
|
String |
toString() |
Converts input data to a string.
|
void |
write(char[] c,
int off,
int len) |
Writes characters to the buffer.
|
void |
write(int c) |
Writes a character to the buffer.
|
void |
write(String str,
int off,
int len) |
Write a portion of a string to the buffer.
|
void |
writeTo(Writer out) |
Writes the contents of the buffer to another character stream.
|
protected char[] buf
protected int count
public CharArrayWriter()
public CharArrayWriter(int initialSize)
initialSize
- an int specifying the initial buffer size.IllegalArgumentException
- if initialSize is negativepublic void write(int c)
public void write(char[] c, int off, int len)
write
in class Writer
c
- the data to be writtenoff
- the start offset in the datalen
- the number of chars that are writtenIndexOutOfBoundsException
- If off
is negative, or len
is negative,
or off + len
is negative or greater than the length
of the given arraypublic void write(String str, int off, int len)
write
in class Writer
str
- String to be written fromoff
- Offset from which to start reading characterslen
- Number of characters to be writtenIndexOutOfBoundsException
- If off
is negative, or len
is negative,
or off + len
is negative or greater than the length
of the given stringpublic void writeTo(Writer out) throws IOException
out
- the output stream to write toIOException
- If an I/O error occurs.public CharArrayWriter append(CharSequence csq)
An invocation of this method of the form out.append(csq)
behaves in exactly the same way as the invocation
out.write(csq.toString())
Depending on the specification of toString
for the
character sequence csq
, the entire sequence may not be
appended. For instance, invoking the toString
method of a
character buffer will return a subsequence whose content depends upon
the buffer's position and limit.
append
in interface Appendable
append
in class Writer
csq
- The character sequence to append. If csq
is
null
, then the four characters "null"
are
appended to this writer.public CharArrayWriter append(CharSequence csq, int start, int end)
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.write(csq.subSequence(start, end).toString())
append
in interface Appendable
append
in class Writer
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
subsequenceIndexOutOfBoundsException
- If start
or end
are negative, start
is greater than end
, or end
is greater than
csq.length()
public CharArrayWriter append(char c)
An invocation of this method of the form out.append(c)
behaves in exactly the same way as the invocation
out.write(c)
append
in interface Appendable
append
in class Writer
c
- The 16-bit character to appendpublic void reset()
public char[] toCharArray()
public int size()
public String toString()
public void flush()
public void close()
Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2017, Oracle and/or its affiliates. 500 Oracle Parkway
Redwood Shores, CA 94065 USA. All rights reserved.
DRAFT 9-internal+0-adhoc.mlchung.jdk9-jdeps