File Reader

Using BufferedReader Class

BufferedReader class is used to read the text from a character-based input stream. It is mostly used to read data line by line by the readLine() method. It makes the performance of the code much faster. It inherits Reader class.

Declaration for Java.io.BufferedReader class:

public class BufferedReader extends Reader

In this example, we read the data from the text file testout.txt using the Java BufferedReader class.

import java.io.*;  
public class Example {  
    public static void main(String args[])throws Exception{    
          FileReader f=new FileReader("D:\\readout.txt");    
          BufferedReader b=new BufferedReader(f);    
  
          int i;    
          while((i=b.read())!=-1){  
          System.out.print((char)i);  
          }  
          b.close();    
          f.close();    
    }    
}    

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User Input:
Hello Coders

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Output

Hello Coders

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Practice it on online java compiler for better understanding.

FAQs

1. What are the other methods to read a file in Java?

1. Using File Reader class
2. Reading the whole File in a List
3. Read a text file as a String

2. How is the Scanner class imported into the java language?

It is imported using the java inbuilt library function: import java. util.Scanner. 

3. List some of the constructors of FileReader class.

1. FileReader(File file)- This constructor creates a new FileReader, given the File to read.
2. FileReader(FileDescriptor fd)- This constructor creates a new FileReader, given the FileDescriptor to read from.
3. FileReader(String fileName)- This constructor creates a new FileReader, given the File's name to read from.

Key Takeaways

This blog has extensively shown the different ways of reading a text file with examples. Every utility that has been mentioned above has provided something special. 

Check out this article to get more information regarding the different methods to take the input. 

We hope that this article has helped you enhance your knowledge regarding the File Reader class and if you would like to gain or learn more, check out our articles here. Do upvote our blog to help the other ninjas grow.

Happy Learning!!