Final Example: An easy way to detect foolish copying - Diff

• import java.io.*;

• public class Diff {

• public static void main(String[] args){

• //check for arguments

• if(args.length !=2){

• System.out.println("Usage: java Diff <file1> <file2>");

• System.exit(0);

• }

• //used for comparing the files textually line by line

• LineNumberReader file1In,file2In;

• //set to false if the files are different

• boolean noDiff= true;

• //used to keep all differences found between the 2 files.

• StringBuffer output= new StringBuffer();

• try{

• file1In= new LineNumberReader(new FileReader(args[0]));

• file2In= new LineNumberReader(new FileReader(args[1]));