Groups > comp.lang.java.programmer > #34140

Re: Another question on Java keyword "this".

Path	csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From	Nigel Wade <nmw@ion.le.ac.uk>
Newsgroups	comp.lang.java.programmer
Subject	Re: Another question on Java keyword "this".
Date	Fri, 15 Apr 2016 14:05:17 +0100
Lines	23
Message-ID	<dnc78dF3surU1@mid.individual.net> (permalink)
References	<7d6a2a1e-bf53-472c-8ec2-2c92a0b5f73e@googlegroups.com> <bc7d7c11-2f50-4a0e-83dd-25df3d0fde4f@googlegroups.com> <e7781c42-b917-47fa-bdfb-9f4574208cb8@googlegroups.com> <da4c5a65-5f66-4e59-926a-f26d3da2faf0@googlegroups.com>
Mime-Version	1.0
Content-Type	text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding	7bit
X-Trace	individual.net hV1E5bElVksfm0nw0DjCZAPCbdHNz+N3b6oSh9Dt9fEPTfuo3b
Cancel-Lock	sha1:b7A25fF+xXIpmiPSFokKn9vGXiw=
User-Agent	Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0
In-Reply-To	<da4c5a65-5f66-4e59-926a-f26d3da2faf0@googlegroups.com>
Xref	csiph.com comp.lang.java.programmer:34140

Show key headers only | View raw

On 15/04/16 13:31, cdalten@gmail.com wrote:
> So would keyword "this" in
>
> mTransparencyBar.setOnSeekBarChangeListener(this);
>
> refer to an instance of OnSeekBarChangeListener?
>
> Just curious because
>
> mTransparencyBar.setOnSeekBarChangeListener(this);
>
> is in the same method.
>
>

It refers to the object on which the method containing that statement was invoked.
That method is a member of the class GroundOverlayDemoActivity, so it must refer to an instance of that class.

It does not refer to an instance of OnSeekBarChangeListener.
OnSeekBarChangeListener is an interface and cannot be instantiated.
It must refer to an instance of a class which has implemented the interface OnSeekBarChangeListener.

Thread

Another question on Java keyword "this". cdalten@gmail.com - 2016-04-14 23:27 -0700
  Re: Another question on Java keyword "this". Eric Douglas <e.d.programmer@gmail.com> - 2016-04-15 04:59 -0700
    Re: Another question on Java keyword "this". cdalten@gmail.com - 2016-04-15 05:14 -0700
      Re: Another question on Java keyword "this". cdalten@gmail.com - 2016-04-15 05:31 -0700
        Re: Another question on Java keyword "this". Nigel Wade <nmw@ion.le.ac.uk> - 2016-04-15 14:05 +0100
          Re: Another question on Java keyword "this". Eric Douglas <e.d.programmer@gmail.com> - 2016-04-15 06:25 -0700
        Re: Another question on Java keyword "this". Lew <lewbloch@gmail.com> - 2016-04-15 14:48 -0700
      Re: Another question on Java keyword "this". Brixomatic <brixomatic@yahoo.com> - 2016-04-23 15:01 +0200
      Re: Another question on Java keyword "this". Roedy Green <inquiry@mindprod.com> - 2016-06-04 03:15 -0700
        Re: Another question on Java keyword "this". Jukka Lahtinen <jtfjdehf@hotmail.com.invalid> - 2016-06-04 14:34 +0300
          Re: Another question on Java keyword "this". Mike Amling <mamling@chaff.us> - 2016-06-04 14:07 -0500
    Re: Another question on Java keyword "this". Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-04-15 08:24 -0400
  Re: Another question on Java keyword "this". cdalten@gmail.com - 2016-04-15 14:45 -0700
    Re: Another question on Java keyword "this". Lew <lewbloch@gmail.com> - 2016-04-15 14:52 -0700
    Re: Another question on Java keyword "this". Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-04-15 18:26 -0400
      Re: Another question on Java keyword "this". cdalten@gmail.com - 2016-04-17 19:13 -0700
        Re: Another question on Java keyword "this". Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-04-18 07:37 -0400

csiph-web