How to compare two files in java & uncommon text should print in text file.

Hi,
Can any one help me to write Core java program for this.
How to compare two files in java & uncommon text should print in other text file.
thanks
Sam

Hi All,
i m comparing two HTML file.. thats why i am getting problem..
import java.io.BufferedReader;
import java.io.FileReader;
public class textmatch{
public static void main(String[] argv)
throws Exception{
BufferedReader fh =new BufferedReader(new FileReader("internal.html"),1024);
BufferedReader sh = new BufferedReader(new FileReader("external.html"),1024);
String s;
String y;
while ((s=fh.readLine())!=null)
if ( s.equals(y=sh.readLine()) ){    
System.out.println(s + " " + y); //REMOVE THIS PRINTLN STATEMENT IF YOU JUST WANT TO SHOW THE SIMILARITIES
sh.close();
fh.close(); }
thanks
Sam

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