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Encryption and Decryption using Symmetric Keys

import java.security.InvalidKeyException; import java.security.Key; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.KeyGenerator; public class Main {   static String algorithm = "DESede";   static Key key = KeyGenerator.getInstance(algorithm).generateKey();   static Cipher cipher = Cipher.getInstance(algorithm);   public static void main(String[] args) throws Exception {     byte[] encryptionBytes = encrypt("input");     System.out.println("Recovered: " + decrypt(encryptionBytes));   }   private static byte[] encrypt(String input) throws InvalidKeyException, BadPaddingException,       IllegalBlockSizeException {     cipher.init(Cipher.ENCRYPT_MODE, key);     byte[] inputBytes = input.getBytes();     return cipher.doFinal(inputBytes);   }   private static String decrypt(byte[] encryptionBytes) throws InvalidKeyException,       BadPaddingException, IllegalBlockSizeException {     cipher.init(Cipher.DECRYPT_MODE, key);     byte[] recoveredBytes = cipher.doFinal(encryptionBytes);     String recovered = new String(recoveredBytes);     return recovered;   } }