trjhtr

Program to compare if files within two directories are having same content
I followed the approach of getting the list of files under two directories recursively and store it in different list with it is canonical path.

Then using two loops, compared the each file line by line. Below is my code,

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class FileCompare

 static List<String> dir1_filePath = new ArrayList<String>();
 static List<String> dir2_filePath = new ArrayList<String>();
 static void fetchFiles(File arr,int start,int level, List<String> filePath) throws IOException 
 
 if(start == arr.length)
 return;
 if(arr[start].isFile())
 filePath.add(arr[start].getCanonicalPath());
 
 else if(arr[start].isDirectory())
 
 fetchFiles(arr[start].listFiles(), 0, level + 1,filePath);
 
 fetchFiles(arr,++start, level,filePath);
 

 public static void main(String args) throws IOException
 
 Scanner s = new Scanner(System.in);
 String directory_one = s.next();
 String directory_two = s.next();
 File dir_one = new File(directory_one);
 File dir_two = new File(directory_two);

 if(dir_one.exists() && dir_one.isDirectory())
 
 File dir1_files = dir_one.listFiles(); 
 fetchFiles(dir1_files,0,0, dir1_filePath); 
 
 if(dir_two.exists() && dir_two.isDirectory())
 
 File dir2_files = dir_two.listFiles(); 
 fetchFiles(dir2_files,0,0, dir2_filePath); 
 
 boolean fileEqual;
 for(int i=0;i<dir1_filePath.size();i++)
 for(int j=1; j<dir2_filePath.size();j++)
 fileEqual = compareTwoFiles(dir1_filePath.get(i), dir2_filePath.get(j));
 if(fileEqual)
 System.out.println(dir1_filePath.get(i) + " and " + dir2_filePath.get(i) + " are Equal");
 
 
 
 

 private static boolean compareTwoFiles(String file1, String file2) throws IOException 

Is there any other approach to compare the files effectively, instead of using two loops?