What are best practices for working with JCA/JCE basics?

        // Example of using JCE for AES encryption
        import javax.crypto.Cipher;
        import javax.crypto.KeyGenerator;
        import javax.crypto.SecretKey;
        import javax.crypto.spec.SecretKeySpec;
        import java.util.Base64;

        public class AESExample {
            public static void main(String[] args) throws Exception {
                // Generate a new AES key
                KeyGenerator keyGen = KeyGenerator.getInstance("AES");
                keyGen.init(128); // for AES-128
                SecretKey secretKey = keyGen.generateKey();

                // Encrypt a sample text
                Cipher cipher = Cipher.getInstance("AES");
                cipher.init(Cipher.ENCRYPT_MODE, secretKey);
                String plainText = "Hello, World!";
                byte[] encryptedText = cipher.doFinal(plainText.getBytes());

                // Convert to base64 for easy representation
                String encryptedBase64 = Base64.getEncoder().encodeToString(encryptedText);
                System.out.println("Encrypted Text (Base64): " + encryptedBase64);

                // Decrypt the sample text
                cipher.init(Cipher.DECRYPT_MODE, secretKey);
                byte[] decryptedText = cipher.doFinal(Base64.getDecoder().decode(encryptedBase64));
                System.out.println("Decrypted Text: " + new String(decryptedText));
            }
        }