Groups > comp.lang.java.programmer > #5191

Re: What's the difference between and instance and an object?

From	Lewis Bloch <lewisbloch@google.com>
Newsgroups	comp.lang.java.programmer, comp.lang.java.help
Subject	Re: What's the difference between and instance and an object?
Date	2011-06-10 11:06 -0700
Organization	http://groups.google.com
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On Jun 8, 8:51 am, Abu Yahya <abu_ya...@invalid.com> wrote:
> On 6/6/2011 10:24 PM, Mayeul wrote:
>
> > In other words, it cannot possibly build an instance of any other class,
> > neither Object nor anything.
>
> Won't 'A' be an instanceOf Object?

An object of any type T is automatically and inherently an instance of
any type S that is a supertype of T, by the very definition of
subtyping.  Subtypes embody the /is-a/ relationship.

--
Lew

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Thread

What's the difference between and instance and an object? Chad <cdalten@gmail.com> - 2011-06-06 09:08 -0700
  Re: What's the difference between an instance and an object? Chad <cdalten@gmail.com> - 2011-06-06 09:16 -0700
  Re: What's the difference between and instance and an object? Patrick <patrick@antispam.invalid> - 2011-06-06 18:18 +0200
    Re: What's the difference between and instance and an object? Chad <cdalten@gmail.com> - 2011-06-06 09:33 -0700
      Re: What's the difference between and instance and an object? Mayeul <mayeul.marguet@free.fr> - 2011-06-06 18:54 +0200
        Re: What's the difference between and instance and an object? Chad <cdalten@gmail.com> - 2011-06-06 10:11 -0700
        Re: What's the difference between and instance and an object? Abu Yahya <abu_yahya@invalid.com> - 2011-06-08 21:21 +0530
          Re: What's the difference between and instance and an object? Abu Yahya <abu_yahya@invalid.com> - 2011-06-08 21:24 +0530
            Re: What's the difference between and instance and an object? Patricia Shanahan <pats@acm.org> - 2011-06-08 09:33 -0700
              Re: What's the difference between and instance and an object? Abu Yahya <abu_yahya@invalid.com> - 2011-06-08 22:07 +0530
          Re: What's the difference between and instance and an object? Lewis Bloch <lewisbloch@google.com> - 2011-06-10 11:06 -0700
            Re: What's the difference between and instance and an object? Abu Yahya <abu_yahya@invalid.com> - 2011-06-11 23:58 +0530
      Re: What's the difference between and instance and an object? Lewis Bloch <lewisbloch@google.com> - 2011-06-10 11:05 -0700

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