Java Programming

Hi ,

I am trying to use JCE in my application. following are the code that i used for encription

public class EncryptionTest   {

	/**
	 * @param args
	 * @throws InvalidKeyException 
	 */
	public static void main(String[] args) throws InvalidKeyException {
		// TODO Auto-generated method stub

		Key myKey = null;
		try {
			myKey = generateKey();
		} catch (NoSuchAlgorithmException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		} catch (InvalidKeyException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (InvalidKeySpecException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	    // get cipher object for password-based encryption
	    Cipher c=null;
		try {
			c = Cipher.getInstance("PBEWithMD5AndDES" , "SunJCE");
		} catch (NoSuchAlgorithmException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (NoSuchPaddingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (NoSuchProviderException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	    // initialize cipher for encryption, without supplying
	    // any parameters. Here, "myKey" is assumed to refer 
	    // to an already-generated key.
	    c.init(Cipher.ENCRYPT_MODE , myKey); 
	    // encrypt some data and store away ciphertext
	    // for later decryption
	    try {
			byte[] cipherText = c.doFinal("This is just an example".getBytes());
		} catch (IllegalStateException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IllegalBlockSizeException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (BadPaddingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	    // retrieve parameters generated by underlying cipher
	    // implementation
	    AlgorithmParameters algParams = c.getParameters();

	    // get parameter encoding and store it away
	    try {
			byte[] encodedAlgParams = algParams.getEncoded();
			System.out.println("Size Of" +encodedAlgParams.length);
			System.out.println("Execution Over !!!");
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

While executing the code its giving the following error

java.security.InvalidKeyException: Missing password
at com.sun.crypto.provider.SunJCE_ab.a(DashoA12275)
at com.sun.crypto.provider.PBEWithMD5AndDESCipher.engineInit(DashoA12275)
at com.sun.crypto.provider.PBEWithMD5AndDESCipher.engineInit(DashoA12275)
at javax.crypto.Cipher.init(DashoA12275)

Its getting from the following line

 c.init(Cipher.ENCRYPT_MODE , myKey); 

I am very new to this kind of implementation pls help me to come out of this

Thanks and Regards
Rasa