Making parameters optional

Sorry if this is covered somewhere else.  I did some searches and did not find
the answer.  Maybe I'm not searching for the right thing.  At any rate, I'm new
to WebLogic and WL Workshop.  I created this simple web service:

package shorty_pkg;

import javax.jws.*;

@WebService
public class firstTest {

	@WebMethod
	public String test01(String pName, int pAge, java.util.Calendar pBDay) {
	
		return "Your name is " + pName;
	
	}
}

As you can see, right now the WS does not even use the pAge and pBDay parameters
(I plan to use them later but only if they are present.

How do I go about making them optional?

I tried editing the WSDL and generating a new service from it but the service it
creates generates errors when I test it.