Palindrome.java

package interviewQuestion;

//Use recursive approach
//Compare first and last characters if they are not same- return false
//If they are same make, remove the first and last characters and make a recursive call.
public class Palindrome {

	public Boolean isPalindrome(String strX) {
		if (strX.length() < 2)
			return true;

		if (strX.charAt(0) == strX.charAt(strX.length() - 1)) {
			return isPalindrome(strX.substring(1, strX.length() - 1));
		} else
			return false;

	}

	public static void main(String args[]) {
		String S1 = "Sumit";
		String S2 = "SumuS";
		String S3 = "ABCDEFGHGFEDCBA";
		String S4 = "Jain niaJ";
		String S5 = "JasasddfwfcsJ";
		Palindrome p = new Palindrome();
		System.out.println("Is " + S1 + " Palindrome ??? :"
				+ p.isPalindrome(S1));
		System.out.println("Is " + S2 + " Palindrome ??? :"
				+ p.isPalindrome(S2));
		System.out.println("Is " + S3 + " Palindrome ??? :"
				+ p.isPalindrome(S3));
		System.out.println("Is " + S4 + " Palindrome ??? :"
				+ p.isPalindrome(S4));
		System.out.println("Is " + S5 + " Palindrome ??? :"
				+ p.isPalindrome(S5));
	}
}