How to read DES key from a file?

Question

I stored the DES key in the file as follows:
KeyGenerator keygen = KeyGenerator.getInstance("DES");
SecretKey Key = keygen.generateKey();
FileOutputStream ostream = new FileOutputStream("t.tmp");
     ObjectOutputStream p = new ObjectOutputStream(ostream);
     p.writeObject(Key) ;
     p.flush();
     ostream.close();
I don't know if there is problem with the above code, I am just new to java cryptography.
I have problem read in the key and store it in the DES key object to be used for decryption.
Can someone please tell me how to do it and a simple example will be appriciated.
thanks
Jeff

Answer 1

Thank you for your help. after getting the key from the file( the output of the key is com.sun.crypto.provider.DESKey@fffe786d, not sure if it is right), I use this key to decrypt the message sent from the client program.
here is the code:
ObjectInputStream ois=new ObjectInputStream(data.getInputStream());
String c = ois.readLine() ;//should I convert the byte[] data to String?
ois.close() ;
jTextField1.setText(c) ;//display the cipher text to the first textfield
byte[] ciphertext = c.getBytes() ;
// System.out.write(ciphertext) ;
// get key from file
FileInputStream in = new FileInputStream("t.tmp");
ObjectInputStream oin = new ObjectInputStream(in);
SecretKey Key = (SecretKey)oin.readObject();
oin.close();
in.close();
System.out.println(Key) ;
//decrypt
Cipher C = Cipher.getInstance("DES");
C.init(Cipher.DECRYPT_MODE, Key);
// Decrypt the ciphertext
byte[] cleartext1 =C.doFinal(ciphertext);
System.out.write(cleartext1) ;//doesn't show anything!!
System.out.println("this is cleartexxt");//doesn't even show this!!
String display = new String(cleartext1);
jTextField2.setText(display);
why there is no output from System.out.write(cleartext1)? where did I go wrong?
thank you.
Jeff