difference between child class object and downcasting object

Newsgroups	comp.lang.java.help
Date	2013-03-07 05:59 -0800
Message-ID	<46d55c9b-7f17-4927-8b9f-b3acf8a0c407@googlegroups.com> (permalink)
Subject	difference between child class object and downcasting object
From	Sai varma <saikondla@gmail.com>

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hi,
i am java fresher,
i am a little bit confusion about runtime polymorphism.
and what is difference between child class object and downcasting object (i.e.both are access same methods then why we select downcasting).
plz give reply.
thanks.

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difference between child class object and downcasting object Sai varma <saikondla@gmail.com> - 2013-03-07 05:59 -0800
  Re: difference between child class object and downcasting object Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2013-03-07 09:53 -0800
    Re: difference between child class object and downcasting object Lew <lewbloch@gmail.com> - 2013-03-10 18:22 -0700
  Re: difference between child class object and downcasting object Roedy Green <see_website@mindprod.com.invalid> - 2013-03-09 17:31 -0800
    Re: difference between child class object and downcasting object Roedy Green <see_website@mindprod.com.invalid> - 2013-03-11 22:35 -0700

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