public class Main {

    public static void main(String[] args) {
	String s = "Hallo";
        System.out.println(palindromTest(s));
    }

    public static boolean palindromTest (String s){
        //Macht daraus alle leerzeichen und Punctuation weg + toLowerCase()!
        String clean = s.replaceAll("\\W+","").toLowerCase();
        System.out.println(clean);
        int length = clean.length();
        int forward = 0;
        int backward = length - 1;

        while(backward > forward){
            char forwardChar = clean.charAt(forward++);
            char backwardChar = clean.charAt(backward--);

            if(forwardChar != backwardChar){
                return false;
            }
        }
        return true;
        }

    }