4.b. read a FILE

b) Write a Java program that reads a file and displays the file on the screen, with a line number before each line.

import java.io.*;

class FileDemo1

{

public static void main(String args[])throws Exception

{

int c=0;

String s="i+ \n is \n java \n program \n";

char buffer[]=new char[s.length()];

s.getChars(0,s.length(),buffer,0);

FileWriter f1=new FileWriter("c:/index.txt");

f1.write(buffer);

f1.close();

FileReader fr=new FileReader("c:/index.txt");

BufferedReader br=new BufferedReader(fr);

String t;

while((t=br.readLine())!=null)

{

c++;

System.out.println(c+t);

}

fr.close();

}

}