Java Exercises

import java.io.IOException;

/**
 *
 * @author Erieze
 */
public class Main {

    /**
     * Check if the given {@code text} is a Palindrome String.
     * <p>
     * Punctuation and whitespace are ignored.
     *
     * @param text A String
     * @return True if text is palindrome, otherwise false
     */
    private static boolean isPalindrome(String text) {
        return removePunc(text).equalsIgnoreCase(
                removePunc(new StringBuilder(text).reverse().toString()));
    }

    /**
     * Removes punctuation from String.
     *
     * @param text A String
     * @return String without punctuation
     */
    private static String removePunc(String text) {
        return text.replaceAll("\\s|(?![@,&])\\p{Punct}", "");
    }

    public static void main(String[] args) throws IOException {
        final String text = "Are we not pure? \"No sir!\" Panama's moody Noriega brags. \"It is garbage!\" Irony dooms a man; a prisoner up to new era.";
        System.out.println("isPalindrome(" + text + ")? " + isPalindrome(text));

        final String s = "QWERTY";
        String result = "";

        for (char ch : s.toCharArray()) {
            if (ch == 'Q')
                result += "A";
            else if (ch == 'W')
                result += "B";
            else if (ch == 'E')
                result += "C";
            else if (ch == 'R')
                result += "D";
            else if (ch == 'T')
                result += "E";
            else if (ch == 'Y')
                result += "F";
        }

        System.out.println(Integer.parseInt(result, 16));
    }

}