Palindrome

WordUtils.java

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;


public class WordUtils {

    public static void main(String[] args) throws Exception {

        String filename = "C:/txtfiles/Palindrome.txt";
        InputStream fis = new FileInputStream(filename);
        BufferedReader br = new BufferedReader(new InputStreamReader(fis));
        String word = null;
        int counter = 0;

        List<String> palindromicWords = new ArrayList<String>();
        List<String> nonPalindromicWords = new ArrayList<String>();

        while ((word = br.readLine()) != null) {

            if (isPalindrome(word)) {
                palindromicWords.add(word);
                counter++;
            } else {
                nonPalindromicWords.add(word);
            }
        }

        System.out.println("Non palindromic words :: " + nonPalindromicWords);
        System.out.println("Total Palindrome Words :: " + counter);
    }


    public static boolean isPalindrome(String word) {

        if (word == null) {
            throw new IllegalArgumentException("Word cannot be null.");
        }

        if (word.trim().length() == 0) {
            throw new IllegalArgumentException("Word cannot be empty.");

        }
        boolean status = false;

        char[] wordCharArray = word.toLowerCase().toCharArray();

        int len = wordCharArray.length;

        for (int i = 0, j = len - 1; i < len - 1; i++, j--) {
            if (wordCharArray[i] == wordCharArray[j]) {
                status = true;
            } else {
                status = false;
                break;
            }
        }
        return status;
    }
}