Comparison of two files in JAVA

This code will help you in comparing two files

 

 

protected void compareFile(String FileTwo, String generatedFile)

throws FileNotFoundException, IOException {

 

 LinkedList<String> FileOneList = new LinkedList<String>();

LinkedList<String> FileTwoList = new LinkedList<String>();

 

 

 String FileOneLine = "", FileTwoLine= "";

 StringBuilder differences = new StringBuilder();

 

 

 // Reading the contents of the files

 

 FileReader FileOneReader= new FileReader(FileOne);

 

BufferedReader brFileOne = new BufferedReader(FileOneReader);

 

while ((FileOneLine = brFileOne.readLine()) != null) {

FileOneList.add(FileOneLine);

 

}

 

FileTwoReader.close();

 

 FileReader FileTwoReader = new FileReader(FileTwo);

BufferedReader brFileTwo = new BufferedReader(FileTwoReader);

while ((FileTwoLine= brFileTwo.readLine()) != null) {

FileTwoList.add(FileTwoLine);

}

FileTwoReader.close();

 // comparing the contents of the files and printing the differences, if

 

// any.

 

int x = 0;

if (FileOneList.size() == FileTwoList.size()) {

x = 0;

 for (int m = 0; m < FileOneList.size(); m++) {

if (!FileOneList.get(m).equals(FileTwoList.get(m))) {

x++;

 differences.append(FileOneList.get(m) + " -- "+ FileTwoList.get(m));

}

}

 differences.append(" No. of differences : " + x);

 } else {

x = 1;

 differences.append("Files not of equal size");

}

 if (x > 0) {

fail("Files do not match " + differences);

}

}

}