How does equals method work on a String Buffer object!

My program is:

Code (Text):

import java.io.*;
class Palindrome
{
    public static void main(String args[])
    {
        try{
            // Open the file that is the first
            // command line parameter
            FileInputStream fstream = new FileInputStream("Words.txt");
            // Get the object of DataInputStream
            DataInputStream in = new DataInputStream(fstream);
            BufferedReader br = new BufferedReader(new InputStreamReader(in));
           
            while(br.readLine()!= null){
            StringBuffer strLine = new StringBuffer(br.readLine());
               
                String str1 = strLine.toString();
                String str2 = strLine.reverse().toString();
               
           
            if (str1.equals(str2)) {
                 
                System.out.println(str1 + " is  a palindrome");
            }
            }
           
           
            //Close the input stream
            in.close();
        }catch (Exception e){//Catch exception if any
            System.err.println("Error: " + e.getMessage());
        }
    }
}

This program checks if a string is a palindrome by reading each word which is on a different line from the file Word.txt. This works .. But my question is :

when I give if(strLine.equals(strLine.reverse()) it doesnot give the desired output. It simply prints all the words in the file Word.txt concatenated with " is a palindrome". Why is it so?

 

Because you have this line which read all the words in file Word.txt

Code (Text):

StringBuffer strLine = new StringBuffer(br.readLine());