java.io.BufferedWriter
class is a subclass of
java.io.Writer
that you chain to another Writer
class to
buffer characters. This allows more efficient
writing of text.
Each time you write to an unbuffered Writer
, there's a matching write to
the underlying output stream. Therefore it's a good idea to wrap a BufferedWriter
around each
Writer
whose write()
operations
are expensive and that does not require immediate response, such as a FileWriter
. For example,
BufferedWriter bw = new BufferedWriter(new FileWriter("37.html"));
There are two constructors, one with a default buffer size of 8192 characters,
and one that lets you specify the buffer size:
public BufferedWriter(Writer out)
public BufferedWriter(Writer out, int size)
The one new method in this class is newLine()
.
This method that writes a platform dependent line
terminator string, \n on Unix, \r on the Mac, \r\n on Windows.
public String newLine() throws IOException
Finally, BufferedWriter
overrides several methods from the superclass Writer
;
but how you use them does not change at all:
public void write(int c) throws IOException
public void write(char c[], int off, int length) throws IOException
public void write(String s, int offset, int length) throws IOException
public void flush() throws IOException
public void close() throws IOException