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Reverse a string recursively

Reverse a string recursively

Monday, November 13, 2023 ⁃ Difficulty: Intermediate

Objective

Create a Java program that prompts the user for a string and implements a recursive function to invert a string of characters.

Instructions

From the main function (main) of the program, prompt the user to input a string of characters.
Implement a recursive function to invert the input string.
Print the result of the inverted string to the screen.

Input

java

Output

avaj

Solution

ReverseStringRecursively.java

import java.util.Scanner;

public class ReverseStringRecursively {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter a string: ");
        String text = input.nextLine();
        input.close();

        String reversedText = reverse(text);
        System.out.println(reversedText);
    }

    public static String reverse(String text) {
        if (text.length() <= 1) {
            return text;
        }

        char firstChar = text.charAt(0);
        String remainingText = text.substring(1);

        return reverse(remainingText) + firstChar;
    }
}

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