webservice with https protocol

hi friends,

i have to use a webservice from java. the service url is in "https" protocol.
now i can use the service from soapui, and can view response.

but when i useit in java code it returns an exception (sun.security.validator.ValidatorException).
also when i type that webservice url in web browser it shows a message saying " the security certificate presented by this website was issued for different website address"

could anyone say what is the issue behind this?
if it is some issue related to security certificate, then how it works fine in soapui?

Thanks in advance....