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Blowfish Encrypt

import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import javax.crypto.Cipher; import javax.crypto.CipherOutputStream; import javax.crypto.KeyGenerator; import javax.crypto.SecretKey; public class MainClass {   public static void main(String[] args) throws Exception {     blowfishEncrypt("plaintextfile", "ciphertextfile");   }   public static void blowfishEncrypt(String f1, String f2) throws Exception {     SecretKey key = null;     ObjectInputStream keyFile = new ObjectInputStream(new FileInputStream("BlowfishKey.ser"));     key = (SecretKey) keyFile.readObject();     keyFile.close();     KeyGenerator keygen = KeyGenerator.getInstance("Blowfish");     key = keygen.generateKey();     ObjectOutputStream keyFileOut = new ObjectOutputStream(new FileOutputStream("BlowfishKey.ser"));     keyFileOut.writeObject(key);     keyFileOut.close();     Cipher cipher = Cipher.getInstance("Blowfish/ECB/PKCS5Padding");     cipher.init(Cipher.ENCRYPT_MODE, key);     BufferedInputStream in = new BufferedInputStream(new FileInputStream(f1));     CipherOutputStream out = new CipherOutputStream(new BufferedOutputStream(new FileOutputStream(         f2)), cipher);     int i;     do {       i = in.read();       if (i != -1)         out.write(i);     } while (i != -1);     in.close();     out.close();   } }