Set my own key instead of using KeyGenerator.generateKey() - how?

Question

How can I set my own key instead of using KeyGenerator.generateKey()?
I don´t see any method that is alowing this.

Answer 1

I have now tried my own.
To send encrypted data through a CipherOutputStream, I have done this:
private File file;
        private CipherOutputStream cos;
        private Cipher cipher;
        private PBEKeySpec key;
        private char[] password = "test".toCharArray();
        public SendFileThread(File file)
            this.file = file;
            try
                key = new PBEKeySpec(password);
                SecretKeyFactory factory = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
                SecretKey pbeKey = factory.generateSecret(key);
                cipher = Cipher.getInstance("PBEWithMD5AndDES");
                cipher.init(Cipher.ENCRYPT_MODE, pbeKey);
            catch(Exception err) {err.printStackTrace();}
        public void run()
            byte [] mybytearray  = new byte [(int)file.length()];
            try
                fis = new FileInputStream(file);
                bis = new BufferedInputStream(fis);
                bis.read(mybytearray,0,mybytearray.length);
                OutputStream os = socket.getOutputStream();
                cos = new CipherOutputStream(os, cipher);
                int byteCount = 0;
                int length = mybytearray.length;
                while(byteCount < mybytearray.length)
                    cos.write(mybytearray[byteCount]);
                os.flush();
                os.close();
                socket.close();
            catch(FileNotFoundException err){err.printStackTrace();}
            catch(IOException err){err.printStackTrace();}To receive the encrypted data and then decrypt it, I use the same password and Cipher.DECRYPT_MODE in the Cipher.init() method.
private Socket sock;
        private DataInputStream din;
        private CipherInputStream cin;
        private BufferedOutputStream out_file;
        private Cipher cipher;
        private PBEKeySpec key;
        private char[] password = "test".toCharArray();
        public ListenForConnectionThread()
            try
                key = new PBEKeySpec(password);
                SecretKeyFactory factory = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
                SecretKey pbeKey = factory.generateSecret(key);
                cipher = Cipher.getInstance("PBEWithMD5AndDES");
                cipher.init(Cipher.DECRYPT_MODE, pbeKey);
            catch(Exception err) {err.printStackTrace();}
        public void run()
            try
                serverSocket = new ServerSocket(2000);
                sock = serverSocket.accept();
                Runnable r = new Runnable()
                    public void run()
                        try
                            cin = new CipherInputStream(sock.getInputStream(), cipher);
                            out_file = new BufferedOutputStream(new FileOutputStream("received_file.txt"));
                            int inputLine;
                            while((inputLine = cin.read()) != -1)
                                out_file.write(inputLine);
                            out_file.flush();
                        catch(Exception err){err.printStackTrace();}When I run the application, I get this error:
java.security.InvalidKeyException: requires PBE parameters.
Why?