//Rasim Mollayev (ID: 2584)
//ADA University
//BCE 2018
//CIS 101-Introduction to CS in Java

import java.util.Scanner; // import Scanner in order to get an input
public class CaesarCipher {

    static String caesar(String value, int shift) { //Created method caesar with two values - string & int
    	//value is a value of - String
    	//shift is an adjusted integer
        char[] buffer = value.toCharArray(); //Here opens an array (set of elements) and a function toCharArray fills symbols of String for example: if String is "Caesar", than array will be {C, a, e, s, a, r}

        for (int i = 0; i < buffer.length; i++) {
            char letter = buffer[i];
            if (letter < 'A' || letter > 'Z' && letter < 'a' || letter > 'z') {
                buffer [i] = letter;
                } else {
                letter = (char) (letter + shift);
                if (letter > 'Z' && letter < 'a' || letter > 'z') {
                        letter = (char) (letter - 26);
                        } else if (letter < 'A' || letter > 'Z' && letter < 'a' ) {
                                letter = (char) (letter + 26);
                        } //finishing else
                buffer[i] = letter;
            }
        }

        return new String(buffer); //give out all buffers in conclusion we get String
}

    private static Scanner in;
    public static void main(String[] args) {

    in = new Scanner(System.in);

    System.out.print("Enter your cipher text here: "); //headline for an input
        System.out.println("\nUnmixed text: "+caesar(in.nextLine(), +2)); //headline for an output (result-decoded text)

    }
}