Palindrome.java

public class Palindrome {

	public static void main(String[] args) {
		System.out.println(isPalindrome("amor roma"));
		System.out.println(isPalindrome("Was it a car or a cat I saw?"));
	}

	public static Boolean isPalindrome(String text) {
		StringBuilder builder = new StringBuilder();
		for (char c : text.toCharArray()) {
			if (Character.isAlphabetic(c)) {
				builder.append(Character.toLowerCase(c));
			}
		}

		text = builder.toString();
		int len = text.length();
		
		for (int i = 0; i < len / 2; ++i) {
			if (text.charAt(i) != text.charAt(len - i - 1)) {
				return false;
			}
		}
		return true;
	}
}