Looking at a few blogs one way is it set it in the code itself rather than java args.
The only trouble with using the java code as setting the password is if it changes a code release would have to happen. There must a better way!
I've heard if you can only password Arguments in plain text as well.
However if u want ur client to use the trust n identity of WLS, u can select the Use Server Certs option from the console.
U'll not have to pass the trust store parameter explicitly!
Trouble is we are using client certs and MSSL.