import java.lang.Math;

public class xor {
    public static void main(String args[]) {
        // This would be the text we encrypt (in this case "hello")
        // We convert it to a character array
        String text = new String("hello");
        char[] arText = text.toCharArray();

        // This would be our vernam cipher (should be same length as our text)
        // Here we use the same letters, but theoretically should be random
        // characters generated on the fly. USE RANDOM LETTERS!
        String cipher = new String("XYZHG");
        char[] arCipher = cipher.toCharArray();

        // Array to hold our encryption (again same length)
        char[] encoded = new char[5];

        // Encrypt the text by using XOR (exclusive OR) each character
        // of our text against cipher.
        System.out.println("Encoded " + text + " to be... ");
        for (int i = 0; i < arText.length; i++) {
            encoded[i] =  (char) (arText[i] ^ arCipher[i]);
            System.out.print(encoded[i]);
        }

        System.out.println("\nDecoded to be... ");

        // Run through the encrypted text and against the cipher again
        // This decrypts the text.
        for (int i = 0; i < encoded.length; i++) {
            char temp = (char) (encoded[i] ^ arCipher[i]);
            System.out.print(temp);
        }
     }
}