Read data from one File and Write it to another File in Java.

package pkg4;

import java.io.FileReader;

import java.io.IOException;

import java.io.BufferedReader;

import java.io.PrintWriter;

public class Main {

 

    public static void main(String[] args)

    {

        BufferedReader br = null;

        String str;

     

        try

        {

           br = new BufferedReader(new FileReader("input.txt")); //open file

           PrintWriter pw = new PrintWriter("output.txt"); ///create file

         

           while((str=br.readLine())!=null) ///read from input file

           {

               pw.println(str); ///write in output file

           }

           pw.close();   ///close the file      

        }

        catch(IOException e)

        {

            System.out.println("File not open");

        }    

    }  

}