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Java read file line by line - Java Tutorial
Posted on: April 16, 2007 at 12:00 AM

In the section of Java Tutorial you will learn how to write java program to read file line by line.
C:\nisha>javac ReadFile.java

C:\nisha>java ReadFile
This is a text file?
C:\nisha>

This program reads the bytes from file and display it to the user.

Download this Program

The another program use DataInputStreams for reading textual input line by line with an appropriate BufferedReader.


import java.io.*;

class FileRead 

{

 public static void main(String args[])

  {

  try{

  // Open the file that is the first 

  // command line parameter

  FileInputStream fstream = new FileInputStream("textfile.txt");

  // Get the object of DataInputStream

  DataInputStream in = new DataInputStream(fstream);

  BufferedReader br = new BufferedReader(new InputStreamReader(in));

  String strLine;

  //Read File Line By Line

  while ((strLine = br.readLine()) != null) {

  // Print the content on the console

  System.out.println (strLine);

  }

  //Close the input stream

  in.close();

  }catch (Exception e){//Catch exception if any

  System.err.println("Error: " + e.getMessage());

  }

  }

}

Output of the Program:

C:\nisha>javac FileRead.java

C:\nisha>java FileRead
this is a file

C:\nisha>

Download the code

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