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Possible Duplicate:
In Java, what is the advantage of using BufferedWriter to append to a file?
The site that I am looking at says
“The BufferWriter class is used to write text to a character-output stream, buffering characters so as to provide for the efficient writing of single characters, arrays, and strings.”
What make’s it more efficient and why?
A BufferedWriter waits until the buffer (8192 bytes) is full and writes the whole buffer in one disk operation. Unbuffered each single write would result in a disk I/O which is obviously more expensive.