Java FileWriter

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

This is a Convenience class 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.

Constructors of FileWriter

• FileWriter(File file) :Constructs a FileWriter object given a File object.
• FileWriter(File file, boolean append) :Constructs a FileWriter object given a File object.
• FileWriter(FileDescriptor fd) :Constructs a FileWriter object associated with a file descriptor.
• FileWriter(String fileName) :Constructs a FileWriter object given a file name.
• FileWriter(String fileName, boolean append) :Constructs a FileWriter object given a file name with a boolean indicating whether or not to append the data written.

Methods

Methods inherited from class java.io.OutputStreamWriter

close, flush, getEncoding, write

Methods inherited from class java.io.Writer

append, append, append, write

Examples :

import java.io.FileWriter;

public class Codemistic 
{

  	public static void main(String args[]) 
	{

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

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

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

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


Output :

A file will be created named output.txt that contains the following line:
This file consists of a single line.

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