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Java Write To File - Java Tutorial
Posted on: June 5, 2007 at 12:00 AM

In the section of Java Tutorial you will learn how to write java program to write to a file.

Java Write To File - Java Tutorial

Learn how to write to a file from Java program. This tutorial teaches you how you can use the OutputStreamWriter on a FileOutputStream classes to write data to a file from Java program.

In the section of Java Tutorial you will learn how to write java program to write to a file. We will use the class FileWriter and BufferedWriter to write to a file.

Class FileWriter
The FileWriter is a class used for writing character files. The constructors of this class assume that the default character encoding and the default byte-buffer size are acceptable. To specify these values yourself, construct an OutputStreamWriter on a FileOutputStream.

BufferedWriter

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.

Here is the code of java program to write text to a file:


import java.io.*;

class FileWrite 

{

 public static void main(String args[])

  {

  try{

  // Create file 

  FileWriter fstream = new FileWriter("out.txt");

  BufferedWriter out = new BufferedWriter(fstream);

  out.write("Hello Java");

  //Close the output stream

  out.close();

  }catch (Exception e){//Catch exception if any

  System.err.println("Error: " + e.getMessage());

  }

  }

}

Download the code

If you execute the above code program will write "Hello Java" into out.txt file. While creating the object of FileWriter class we have passed the name of the file e.g. "out.txt" as constructor argument.

The BufferedWriter class takes FileWriter object as parameter. The write() method of the BufferedWriter class actually writes the data into the text file.

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