We would like to know how to check if a string is palindrome.
public class Main { public static boolean isPalindrome(String stringToTest) { String workingCopy = removeJunk(stringToTest); String reversedCopy = reverse(workingCopy); //from ww w.j a va2 s . co m return reversedCopy.equalsIgnoreCase(workingCopy); } static String removeJunk(String string) { int i, len = string.length(); StringBuffer dest = new StringBuffer(len); char c; for (i = (len - 1); i >= 0; i--) { c = string.charAt(i); if (Character.isLetterOrDigit(c)) { dest.append(c); } } return dest.toString(); } protected static String reverse(String string) { StringBuffer sb = new StringBuffer(string); return sb.reverse().toString(); } public static void main(String[] args) { String string = "Madam, I'm Adam."; if (isPalindrome(string)) { System.out.println("yes"); } else { System.out.println("no"); } } }