3. Криптиране на текст (със StringBuilder)

package TextProcessing;

import java.util.Scanner;

public class EncryptText_03 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String text = scanner.nextLine(); //"Programming is cool!" -> ['P', 'r', 'o', ...]
        StringBuilder encryptedText = new StringBuilder(); //криптирания текст

        for (char symbol : text.toCharArray()) {
            //променям символа
            char newSymbol = (char) (symbol + 3);
            encryptedText.append(newSymbol); //encryptedText = encryptedText + newSymbol; -> бавна
        }

        System.out.println(encryptedText);
    }
}