Java Problems Solutions: Reverse a String and Check if a string is a palindrome

import java.util.Scanner;

public class StringReverser {
    public static void main(String[] args) {
        // Get input from the user
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter a string: ");
        String inputString = scanner.nextLine();
        scanner.close();

        // Step 2: Reverse the string
        String reversedString = reverseString(inputString);

        // Step 3: Display the reversed string
        System.out.println("The reversed string is: " + reversedString);

        // Step 4: Compare strings
        compareStrings(inputString, reversedString);
    }

    // Function to reverse a string
    private static String reverseString(String original) {
        StringBuilder reversed = new StringBuilder();
        for (int i = original.length() - 1; i >= 0; i--) {
            reversed.append(original.charAt(i));
        }
        return reversed.toString();
    }

    // Function to compare two strings
    private static void compareStrings(String str1, String str2) {
        // 1st way: Using equals() method (exact equality)
        boolean isEqual1 = str1.equals(str2);
        System.out.println("Using equals() method: Strings are equal? " + isEqual1);

        // 2nd way: Using equalsIgnoreCase() method
        boolean isEqual2 = str1.equalsIgnoreCase(str2);
        System.out.println("Using equalsIgnoreCase() method: Strings are equal? " + isEqual2);

        // 3rd way: Using compareTo() method
        int comparisonResult = str1.compareTo(str2);
        System.out.println("Using compareTo() method: Comparison result: " + comparisonResult);
    }
}

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