ceaser cipher

public class CaesarCipher {

public static String encrypt(String text, int shift) {
    StringBuilder result = new StringBuilder();

    for (char c : text.toCharArray()) {
        if (Character.isLetter(c)) {
            char base = Character.isUpperCase(c) ? 'A' : 'a';
            result.append((char)((c - base + shift) % 26 + base));
        } else {
            result.append(c);
        }
    }
    return result.toString();
}

public static String decrypt(String text, int shift) {
    return encrypt(text, 26 - shift);
}

public static void main(String[] args) {
    String message = "HELLO WORLD";
    int shift = 3;

    String encrypted = encrypt(message, shift);
    String decrypted = decrypt(encrypted, shift);

    System.out.println("Caesar Cipher");
    System.out.println("Original : " + message);
    System.out.println("Encrypted: " + encrypted);
    System.out.println("Decrypted: " + decrypted);
}

}