[ADMIN] killing old connections

[Tim White]

Is there a way to view the active/inactive connections to PostgreSQL 6.5.3?
And if so is it possible to kill those that are inactive?  I'm having
difficulty in testing using a Java application, where connections are
established and then not being destroyed properly.  This causes me to get an
error message stating that there are "...too many clients already.".

Any help is greatly appreciated.

Tim White