File Writer

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File Writer: class inherits from the OutputStreamWriter class. The class is used for writing streams of characters.
This class has several constructors to create required objects.
Following syntax creates a FileWriter object given a File object.

FileWriter(File file)

Following syntax creates a FileWriter object given a File object.

FileWriter(File file, boolean append)

Following syntax creates a FileWriter object associated with a file descriptor.

FileWriter(FileDescriptor fd)

Following syntax creates a FileWriter object given a file name.

FileWriter(String fileName)

Following syntax creates a FileWriter object given a file name with a boolean indicating whether or not to append the data written.

FileWriter(String fileName, boolean append)

Once you have FileWriter object in hand then there is a list of helper methods which can be used manipulate the files.

SN	Methods with Description
1	public void write(int c) throws IOException Writes a single character.
2	public void write(char [] c, int offset, int len) Writes a portion of an array of characters starting from offset and with a length of len.
3	public void write(String s, int offset, int len) Write a portion of a String starting from offset and with a length of len.

Example:

Following is the example to demonstrate class:

import java.io.*; public class FileRead{ public static void main(String args[])throws IOException{ File file = new File("Hello1.txt"); // creates the file file.createNewFile(); // creates a FileWriter Object FileWriter writer = new FileWriter(file); // Writes the content to the file writer.write("This\n is\n an\n example\n"); writer.flush(); writer.close(); //Creates a FileReader Object FileReader fr = new FileReader(file); char [] a = new char[50]; fr.read(a); // reads the content to the array for(char c : a) System.out.print(c); //prints the characters one by one fr.close(); } }

This would produce following result:

This
 is
 an
 example

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