Writte a JAVA program to merge two files by taking input as two .txt file and Display Files Contents In Third File

sample..
............
input file:
            input1.txt

Ram is a good boy

         input2.txt

He is Very poor



output file:
         output.txt

Ram is a good boy
He is very poor

CombineTwoFile.java

package com.test;

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import java.util.ArrayList;

public class CombineTwoFile

{

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

       {      

       ArrayList<String> list = new ArrayList<String>();

       try

       {

       BufferedReader br = new BufferedReader(new FileReader( "input1.txt"));

         BufferedReader r = new BufferedReader(new FileReader( "input2.txt"));

            String s1 =null;

            String s2 = null;

           

                         while ((s1 = br.readLine()) != null)

                         {                         

                                        list.add(s1);        

                         }

                         while((s2 = r.readLine()) != null)

                         {    

                                        list.add(s2);    

                         } 

       }

        catch (IOException e)

          {

            e.printStackTrace();

          }

      

           BufferedWriter writer=null;

           writer = new BufferedWriter(new FileWriter("output.txt"));

            String listWord;              

                   for (int i = 0; i< list.size(); i++)

                  {

                        listWord = list.get(i);

                       writer.write(listWord);

                       writer.write("\n");

                  }

                           System.out.println("complited");

                           writer.close();    

        }

    }