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

This is a Convenience class for reading character files. The constructors of this class assume that the default character encoding and the default byte-buffer size are appropriate. To specify these values yourself, construct an InputStreamReader on a FileInputStream.

Constructors of FileReader

• FileReader(File file) :Creates a new FileReader, given the File to read from.
• FileReader(FileDescriptor fd) :Creates a new FileReader, given the FileDescriptor to read from.
• FileReader(String fileName) :Creates a new FileReader, given the name of the file to read from.

Methods

Methods inherited from class java.io.InputStreamReader

close, getEncoding, read, ready

mark, markSupported, read, reset, skip

This file consists of a single line.

import java.io.FileReader;

class Codemistic 
{
 	public static void main(String[] args) 
	{

    		// Creates an array of character
    		char[] array = new char[100];

    		try 
		{
      			// Creates a reader using the FileReader
      			FileReader input = new FileReader("input.txt");

      			// Reads characters
      			input.read(array);
      			System.out.println("Data in the file: ");
      			System.out.println(array);

      			// Closes the reader
      			input.close();
    		}
    		catch(Exception e) 
		{
      			e.getStackTrace();
    		}
  	}
}


Output :

Data in the file:
This file consists of a single line.