Consider web service (ws.NewWebService) with this
web service operation:

public String sayHello(String to) {
    return "Hello " + to;
}

Now create ws client for this ws and call sayHello
operation from eg. servlet.

Code generated by IDE is now (in case of JSR-109
client):
try {
    getNewWebServiceSEIPort().sayHello(/* TODO
enter operation arguments */);
} catch(java.rmi.RemoteException ex) {
    // TODO handle remote exception
}

I think that it would be better (useful) for
users/developers to generate this code for ws
mentioned above:
String to = null;
String result = null;
try {
    result = getNewWebServiceSEIPort().sayHello(to);
} catch(java.rmi.RemoteException ex) {
    // TODO handle remote exception
}

This means for each argument of ws operation
generate variables (with initial values - null, 0,
false,...) and provide variable which will contain
the result of call of ws operation (if it does not
have void as return type).