Read the File

As we have read about  the BufferedInputStream class that lets you read characters from a stream and stores it in an internal buffer. Lets see an example that reads the contains of the existed file.
The given example uses the BufferedInputstream class that reads the bytes from the input stream. The input stream is a file "Filterfile.txt" from which the data is read in form of a byte through the read( ) method. The read( ) method reads the byte from the file that is converted into the character-form.

import java.io.*; 

class ReadFilter
{
    public static void main(String args[])
    {
        try 
        {
      FileInputStream fin = new FileInputStream("Filterfile.txt");
            BufferedInputStream bis = new BufferedInputStream(fin);
      
            // Now read the buffered stream.
            while (bis.available() > 0) 
            {
                System.out.print((char)bis.read());
            }
        
        } 
        catch (Exception e) 
        {
            System.err.println("Error reading file: " + e);
        }
    }
}

Output of the Program:

C:\nisha>javac ReadFilter.java

C:\nisha>java ReadFilter
This is a text file
C:\nisha>