This is the Problem with Java Programming. Please solve the Problem with recursi

Question

This is the Problem with Java Programming. Please solve the Problem with recursion and as directed in the question.

thanks

Exercise 18.9: (Print the characters in a string reversely) Write a recursive method that displays a string reversely on the console using the the following header: public static void reverseDisplay(String value) For example, reverseDisplay("abcd") displays dcba. Write a test program that prompts the user to enter a string and displays its reversal. Exercise 18.12: Rewrite Programming Exercise 18.9 using a helper method to pass the substring high index to the method. The helper method is: public static void reverseDisplay(String value, int high)

Explanation / Answer

18.9) import java.util.Scanner; public class ReverseDisplay { public static void reverseDisplay(String value) { if(value.length() != 0) { reverseDisplay(value.substring(1)); System.out.print(value.charAt(0)); } } public static void main(String[] args) { Scanner in = new Scanner(System.in); System.out.print("Enter a string: "); String line = in.nextLine(); reverseDisplay(line); System.out.println(); } } 18.12) import java.util.Scanner; public class ReverseDisplay { public static void reverseDisplay(String value) { reverseDisplay(value, value.length()-1); } public static void reverseDisplay(String value, int high) { if(high >= 0) { System.out.print(value.charAt(high)); reverseDisplay(value, high-1); } } public static void main(String[] args) { Scanner in = new Scanner(System.in); System.out.print("Enter a string: "); String line = in.nextLine(); reverseDisplay(line); System.out.println(); } }

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