Question

1) Only a single main class is required

2) The main class must contain a static method called "getInputWord" that prompts a user to input a word from the keyboard and returns that word as a String. This method must use "JOptionPane.showInputDialog" to get the input from the user (you can find info about JOptionPane in JavaDocs)

3) The main class must contain a static method called "palindromeCheck" that takes a String as an input argument and returns a boolean indicating whether or not that String is a palindrome. This method must utilize a Stack data structure to determine whether the word is a palindrome. Hint: Use the charAt() method of the String class to access each character of the word

Flow of the Program:

1) Read in a word from the user by calling the "getInputWord" method

2) Check if the word is a palindrome using the "palindromeCheck" method

3) Output the result to the screen using "JOptionPane.showMessageDialog" (you can find info about JOptionPane in JavaDocs)

Answer 1

import java.util.Stack;
import javax.swing.JOptionPane;

public class PalindromeCheckerUsingStack {

   public static void main(String[] args) {
String input = getInputWord();
if(palindromeCheck(input)){
JOptionPane.showMessageDialog(null,"String is palindrome"); // show message
}else{
JOptionPane.showMessageDialog(null,"String is not palindrome");
}
   }

   public static boolean palindromeCheck(String input) {
       String palindromeString = ""; // to append stack input
       // initialize a stack
Stack<Character> stack = new Stack<Character>();
// iterate over the string
       for (int i = 0; i < input.length(); i++) {
char character = input.charAt(i);
stack.push(character);
       }
// iterate over the stack till it is empty
       while (!stack.isEmpty()) {
// add the character at the top to a string   
palindromeString = palindromeString + stack.pop();
       }
// compare original and reversed strings
       if (input.equals(palindromeString)) {
return true;
       } else {
return false;
       }
   }

private static String getInputWord() {
return JOptionPane.showInputDialog("Please Enter a word: "); // reading a word
}
}

/* OUTPUT */

/* PLEASE UPVOTE *./