[FIXED] comparing two text document for similarities in java

Issue

I've written code for comparing two text files. It is showing the result only if the match is in same position as in the first text file. I wanted to find match anywhere in other text file. Please suggest a way to do this. The code which i've written is shown below :

import java.io.*;

public class CompareTextFiles {

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

      FileInputStream fstream1 = new FileInputStream("text1.txt");
      FileInputStream fstream2 = new FileInputStream("text2.txt");

      DataInputStream in1= new DataInputStream(fstream1);
      DataInputStream in2= new DataInputStream(fstream2);

      BufferedReader br1 = new BufferedReader(new InputStreamReader(in1));
      BufferedReader br2 = new BufferedReader(new InputStreamReader(in2));

      String strLine1, strLine2;


      while((strLine1 = br1.readLine()) != null && (strLine2 = br2.readLine()) != null){
          if(strLine1.equals(strLine2)){
              System.out.println(strLine1);

          }

      }

    }
}

Solution

Store the whole content of one of the files to a string, rather than comparing line by line.

String strLine1, strLine2; StringBuffer strFile2 = new StringBuffer(); //Store the contents of File2 in strFile2 while((strLine2 = br2.readLine()) != null) { strFile2.append(strLine2); } //Check whether each line of File1 is in File2 while((strLine1 = br1.readLine()) != null){ if(strFile2.toString().contains(strLine1)){ System.out.println(strLine1); } }

Answered By - Raghavendra