How can I access the exposed methods in a .wsdl
file using Java? Also, what are the steps involved in writing a Java client and consuming the webservices?
soapUI is one of the softwares allowing you to easily get into WSDL / SOAP world. You can generate SOAP requests with test values to be sent to the server. You can also see the server's SOAP responses. This will let you understand a bit more of WSDL / SOAP. For generating the java code from the wsdl see the recommendations above.