The class writes text to a character-output stream, buffering characters so as to provide for the efficient writing of single characters, arrays, and strings.Following are the important points about BufferedWriter −

  • The buffer size may be specified, or the default size may be used.

  • A Writer sends its output immediately to the underlying character or byte stream.

Class declaration

Following is the declaration for class −

public class BufferedWriter
   extends Writer


Following are the fields for class −

  • protected Object lock − This is the object used to synchronize operations on this stream.

Class constructors

Sr.No. Constructor & Description

BufferedWriter(Writer out)

This creates a buffered character-output stream that uses a default-sized output buffer.


BufferedWriter(Writer out, int sz)

This creates a new buffered character-output stream that uses an output buffer of the given size.

Class methods

Sr.No. Method & Description
1 void close()

This method closes the stream, flushing it first.

2 void flush()

This method flushes the stream.

3 void newLine()

This method writes a line separator.

4 void write(char[] cbuf, int off, int len)

This method writes a portion of an array of characters.

5 void write(int c)

This method writes a single character.

6 void write(String s, int off, int len)

This method writes a portion of a String.

Methods inherited

This class inherits methods from the following classes −