Detect if a string is a palindrome. Follow-up: if there is whitespaces in the string.

Question

Andrea · Accepted Answer

public static boolean isPalindrome(String value) {

        int length = value.length();

        for (int i=0; i

Naresh · Answer

package com.bestinterview;
import java.util.HashSet;
import java.util.Set;
 
public class PalindromeGenerator1 {
	/**
	 * Generate palindrome sequence for a given string.
	 *  
	 * @param in Input String (case-sensitive)
	 * @return Palindrome sequence of the given sequence. null if its not possible. 
	 */
	public static String generate(String in) {
 
		//Basic null check.
		if(in == null) return null;
 
		int len = in.length();
		char[] result = new char[len];
		//Set to keep track of buffer characters.
		Set set=new HashSet();
		Character c='a';
		int i=0, j=0;
		for(i=0; i

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