What are some examples of encryption in Java?

What are some examples of encryption in Java?

Java provides several libraries for encryption, such as JCE (Java Cryptography Extension). Would you like to see a specific example?

Yes, can you show me how to implement AES encryption?

Sure! Here's a simple example of AES encryption in Java:

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;

public class AESEncryption {
    public static void main(String[] args) throws Exception {
        KeyGenerator keyGen = KeyGenerator.getInstance("AES");
        keyGen.init(128);
        SecretKey secretKey = keyGen.generateKey();

        Cipher cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);

        String originalText = "Hello, World!";
        byte[] encryptedText = cipher.doFinal(originalText.getBytes());
        System.out.println("Encrypted Text: " + new String(encryptedText));
    }
}

What about decryption? How can I decrypt the text?

To decrypt the text, you would use the same Cipher instance but initialize it in DECRYPT_MODE with the same secret key. Here's how:

cipher.init(Cipher.DECRYPT_MODE, secretKey);
byte[] decryptedText = cipher.doFinal(encryptedText);
System.out.println("Decrypted Text: " + new String(decryptedText));