Monday, December 9, 2013

Comparing 2 files

If you wanted to know whether 2 files is having same content or not, you need not to compare two files line by line, instead you can compare checksums of each file.

For this, you need to use Apache common-codec_1.7.jar file.


package com.kk;


import org.apache.commons.codec.digest.DigestUtils;

public class CompareFiles {

public static boolean compare(String oldFile, String newFile) throws IOException {
FileInputStream fis1 = new FileInputStream(oldFile);
String oldmd5 = DigestUtils.md5Hex(fis1);// old file checksum
FileInputStream fis = new FileInputStream(newFile);
String latestmd5 = DigestUtils.md5Hex(fis); // new file checksum
return oldmd5.equals(latestmd5);
public static void main(String[] args) {
String oldFile = "D:\\Work\\test\\js\\kklibrary.js";
String newFile = "D:\\Work\\test\\kklibrary.js";
try {
boolean compare = compare(oldFile, newFile);
System.out.println("Both files are: "+ compare);
} catch (IOException e) {

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