How to split user input into char array or string array and then check if palindrome or not in java

You can use split for this purpose and it will work.

String[] wordArray = wordGuess.split(" "); //or .split("<seperator used b/w words>") 

Now iterate the wordArray and check for palindrome individually for each word. In your code you are not checking each word individually

//wrong

for(int x=wordArray.length-1;x>=0;x--){ reverseWord = reverseWord+wordArray[x]; } 

// modified code

 while(true){ System.out.print("Please enter at least three words to check: "); wordGuess = scanUserInput.nextLine(); String[] wordArray = wordGuess.split(","); // char[] wordArray = wordGuess.toCharArray(); for (String word : wordArray) { reverseWord = ""; for(int x=word.length()-1;x>=0;x--){ reverseWord = reverseWord+word.charAt(x); } System.out.println(reverseWord); if(word.equalsIgnoreCase(reverseWord)) { System.out.println(""); System.out.println("You have found a Palindrome!!!"); System.out.println("The Palindrome we found was "+reverseWord); } else{ System.out.println(""); System.out.println("You have not entered a Palindrome..."); System.out.println("Please Try again..."); } } } 

Your logic looks completely fine to me. If you have the additional requirement of being able to accept a CSV list of words to check, then you can slightly modify your code as follows:

System.out.print("Please enter at least three words to check: "); String wordGuess = scanUserInput.nextLine(); String[] words = wordGuess.split(",\\s*"); for (String word : words) { String reverseWord = ""; char[] wordArray = word.toCharArray(); for (int x=wordArray.length-1; x>=0; x--) { reverseWord = reverseWord + wordArray[x]; } System.out.println(reverseWord); if (wordGuess.equalsIgnoreCase(reverseWord)) { System.out.println(""); System.out.println("You have found a Palindrome!!!"); System.out.println("The Palindrome we found was " + reverseWord); } else { System.out.println(""); System.out.println("You have not entered a Palindrome..."); System.out.println("Please Try again..."); } } 

I think there was a problem with the pattern you were using to split. You were doing this:

String[] wordArray = wordGuess.split(","); 

But if you input a CSV list with spaces, then it would capture that whitespace as being part of the word and then probably would not have a palindrome. Also, you needed to loop over the input words, which you also were not doing.

Your question is:- The lab objective is Check each word individually to see if it is a palindrome – if you find one, print it to the screen.

you have to check every string that is palindrome or not, this is what I get from your question :-

here is the code for that solution:

import java.util.Scanner; import java.util.StringTokenizer; /** * Created by itt on 10/4/17. */ public class Palindrome { private static Scanner scanUserInput; private static String wordGuess, reverseWord ; public static void main(String[] args) { scanUserInput = new Scanner(System.in); System.out.println("WELCOME TO THE PALINDROME CHECKER!!!"); System.out.println("Enter Strings with spaces to check palindrome"); wordGuess = scanUserInput.nextLine(); StringTokenizer tokens = new StringTokenizer(wordGuess); System.out.println("Pallindrome Strings"); while (tokens.hasMoreTokens()){ StringBuilder builder = new StringBuilder(); String token = tokens.nextToken(); builder.append(token); if(builder.reverse().toString().equals(token)) { System.out.println(token); } } } } 

Output:

WELCOME TO THE PALINDROME CHECKER!!! Enter Strings with spaces to check palindrome abba acac daad jaaj Pallindrome Strings abba daad jaaj 

if I am wrong, please correct me So I can improve on that.