CaesarCipher

/** * Write in a message and run a Caesar cipher on it to encrypt the message * * @author Sameer, Raunaq, Schuyler * @version 1.0 */ import java.util.*; public class CaesarCipher { public static void main (String args[]) { //Initializing the alphabet variable String alphabet = "abcdefghijklmnopqrstuvwxyz"; //While loop that runs continously to let you input message while (true) { //Initialize Scanner variable Scanner sc = new Scanner(System.in); //Enter shift as input System.out.println("Please enter the shift:"); int shift = sc.nextInt(); //Initialize second Scanner variable Scanner sc2 = new Scanner(System.in); //Enter decrypted message as input System.out.println("Please enter your decrypted message: "); String input = sc2.nextLine(); input = input.toLowerCase(); //Loop to iterate through characters of a string int first = 0; int second = 1; String finalString = ""; while (first < input.length()) { //Take the character of the input String character = input.substring(first, second); int realIndex = alphabet.indexOf(character); //Add the shift and take the new character from alphabet int newIndex = realIndex + shift; if (newIndex >= alphabet.length()) { newIndex = alphabet.length() - newIndex; } String newChar = alphabet.substring(newIndex, (newIndex + 1)); finalString += newChar; //Let loop keep running first += 1; second += 1; } //Print out final result System.out.println(finalString); } } }