your "Service Updating..." sounds like it is the proverbial 'long running task', and this
> Currently the problem we are phasing is Child JFrame component (JLabel) is not displayed till the parent process gets exceuted.
is a symptom of doing the 'long running task' is the swing
thread (EDT), which blocks it.
if so, the fix would be to do your "Service Updating..." in a separate thread/swingworker/whatever, anything but the EDT