Closeable
, Flushable
, Appendable
, AutoCloseable
Closing a StringWriter
has no effect. The methods in this class can be called after the stream has been closed without generating an IOException
.
Constructors
Create a new string writer using the default initial string-buffer size.
Create a new string writer using the specified initial string-buffer size.
Appends the specified character to this writer.
Appends the specified character sequence to this writer.
Appends a subsequence of the specified character sequence to this writer.
void
Closing a StringWriter
has no effect.
void
Return the string buffer itself.
Return the buffer's current value as a string.
void
write(char[] cbuf, int off, int len)
Write a portion of an array of characters.
void
Write a single character.
void
void
Write a portion of a string.
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 expanded
IllegalArgumentException
- If initialSize
is negative
public 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 characters
off
- Offset from which to start writing characters
len
- Number of characters to write
IndexOutOfBoundsException
- If off
is negative, or len
is negative, or off + len
is negative or greater than the length of the given array
Write a string.
Write a portion of a string.
write
in class Writer
str
- String to be written
off
- Offset from which to start writing characters
len
- Number of characters to write
IndexOutOfBoundsException
- If off
is negative, or len
is negative, or off + len
is negative or greater than the length of the given string
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.
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 subsequence
end
- The index of the character following the last character in the subsequence
IndexOutOfBoundsException
- If start
or end
are negative, start
is greater than end
, or end
is greater than csq.length()
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
append
in interface Appendable
append
in class Writer
c
- The 16-bit character to append
Return the buffer's current value as a string.
Return the string buffer itself.
public void flush()
The flush
method of StringWriter
does nothing.
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 AutoCloseable
close
in interface Closeable
close
in class Writer
IOException
- If an I/O error occurs
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