public class StringWriter extends Writer
A character stream that collects its output in a string buffer, which can then be used to construct a string.
Closing a StringWriter has no effect. The methods in this class can be called after the stream has been closed without generating an IOException.
lock public StringWriter()
Create a new string writer using the default initial string-buffer size.
public StringWriter(int initialSize)
Create a new string writer using the specified initial string-buffer size.
initialSize - The number of char values that will fit into this buffer before it is automatically expandedIllegalArgumentException - If initialSize is negativepublic void write(int c)
Write a single character.
public void write(char[] cbuf,
int off,
int len) Write a portion of an array of characters.
write in class Writer
cbuf - Array of charactersoff - Offset from which to start writing characterslen - Number of characters to writepublic void write(String str)
Write a string.
public void write(String str,
int off,
int len) Write a portion of a string.
write in class Writer
str - String to be writtenoff - Offset from which to start writing characterslen - Number of characters to writepublic StringWriter append(CharSequence csq)
Appends the specified character sequence to this writer.
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 StringWriter append(CharSequence csq,
int start,
int end) Appends a subsequence of the specified character sequence to this writer.
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 StringWriter append(char c)
Appends the specified character to this writer.
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 String toString()
Return the buffer's current value as a string.
public StringBuffer getBuffer()
Return the string buffer itself.
public void flush()
Flush the stream.
public void close()
throws IOException Closing a StringWriter has no effect. The methods in this class can be called after the stream has been closed without generating an IOException.
close in interface Closeable
close in interface AutoCloseable
close in class Writer
IOException - If an I/O error occurs
© 1993–2017, Oracle and/or its affiliates. All rights reserved.
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).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.