BufferedWriter methods

• close() = closes the stream, flushing it first
• flush() = flushes the stream
• newLine() = Writes a line separator
• write(String s, int off, int len) = Writes a String from position off for length len
• write(char[] array, int off, int len) = writes a character array from position off for length len
• write(int c) = writes a single character.