Groups > comp.lang.java.programmer > #5218

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

From	Abu Yahya <abu_yahya@invalid.com>
Newsgroups	comp.lang.java.programmer, comp.lang.java.help
Subject	Re: What's the difference between and instance and an object?
Date	2011-06-11 23:58 +0530
Organization	Aioe.org NNTP Server
Message-ID	<it0c43$s3t$4@speranza.aioe.org> (permalink)
References	(1 earlier) <4decfdbc$0$17721$426a74cc@news.free.fr> <1a327de4-8451-4379-a75b-7cc2dab3fb5b@34g2000pru.googlegroups.com> <4ded05bb$0$17813$426a74cc@news.free.fr> <iso5qu$36v$2@speranza.aioe.org> <fd76d26e-01ee-449f-b631-bad6030d4e1e@s16g2000prf.googlegroups.com>

Cross-posted to 2 groups.

Show all headers | View raw

On 6/10/2011 11:36 PM, Lewis Bloch wrote:
> 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.
>

Thanks, Lew, for the explanation.

Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Next in thread | Find similar

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

csiph-web