Java Program Write a recursive method that takes a string and return a string where every character appears twice.
Output must match exactly as below: only two LL's since there is already two of the character
For example, if the string is “HELLO”, it will return “HHEELLOO”.
Write a program to test it. must be recursive!!!
import java.util.Scanner; public class Twice { public static String twice(String s) { if(s.isEmpty()) { return ""; } else { if(s.length() > 1 && s.charAt(0) == s.charAt(1)) { return s.substring(0, 2) + twice(s.substring(2)); } return "" + s.charAt(0) + s.charAt(0) + twice(s.substring(1)); } } public static void main(String[] args) { Scanner in = new Scanner(System.in); System.out.print("Enter a string: "); System.out.println(twice(in.nextLine())); } }
Java Program Write a recursive method that takes a string and return a string where every...
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