client code by wsdl2java

[Henry Lu]

I am new to cxf. I have a wsdl file and want to generate client file(s) 
to call the service. I used the following command:

wsdl2java -client xxx.wsdl
It generates following files:
xxx.java
xxxhttpget_client.java
xxxhttppost_client.java
xxxSoap_client.java
xxxSoap12_client.java

Which java file if good for me to use?

And our server side service requires login user name and password, how 
do I set username and password in the client code?

-Henry