Hi!
There are two options; you can either look at the WSDL file. For WSDL 1.1
you should look in the <portType> element, for WSDL 2.0 the <interface> element.
In these elements there will be one or more <operation> elements, which name(s) will be reflected in the generated artifacts.
Oherwise, when using WSDL2Java, there will usually be an interface generated, which represents the interface of the web service. Try take a look if you can find this interface.
Best wishes!