dsa

Java BufferedWriter

See More

In this tutorial, we will learn about the Java BufferedWriter, its constructors and its methods with the help of an example.

Java BufferedWriter writes text to a character-output stream, buffering characters so as to provide for the efficient writing of single characters, arrays, and strings.

Constructors of BufferedWriter

  • BufferedWriter(Writer out) :Creates a buffered character-output stream that uses a default-sized output buffer.
  • BufferedWriter(Writer out, int sz) :Creates a new buffered character-output stream that uses an output buffer of the given size.

Methods

MethodsDescription
void close()Closes the stream, flushing it first.
void flush()Flushes the stream.
void newLine()Writes a line separator.
boolean markSupported()Tells whether this stream supports the mark() operation, which it does.
void write(int c)Writes a single character.
void write(char[] cbuf, int off, int len)Writes a portion of an array of characters.
void write(String s, int off, int len)Writes a portion of a String.

Examples :


import java.io.FileWriter;
import java.io.BufferedWriter;

public class Codemistic 
{

  	public static void main(String args[]) 
	{

    		String data = "This file consists of a single line.";

    		try 
		{
      			// Creates a FileWriter
      			FileWriter file = new FileWriter("output.txt");

      			// Creates a BufferedWriter
      			BufferedWriter output = new BufferedWriter(file);

      			// Writes the string to the file
      			output.write(data);

      			// Closes the writer
      			output.close();
    		}
    		catch (Exception e) 
		{
      			e.getStackTrace();
    		}
  	}
}


Output :

A file named output.txt will be created which will contain the below line:
This file consists of a single line.