code equivalent for -Djavax.net.ssl.trustStore= ?

I have a simple client/server set up that uses SSL sockets.
As this is for an in-house demo, I have self-signed certificates.
Currently, the client is run using:

java -Djavax.net.ssl.trustStore=theStore
-Djavax.net.ssl.trustStorePassword=password Client

theStore is simply the exported keytool-generated certificate
that was then imported with keytool

Could anyone point me to code that loads theStore from within
the clinet?  I'm having a difficult time getting the
TrustManagerFactory to work (assuming that is the correct
method).

Thanks in advance.