Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


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

Re: Another question on Java keyword "this".

From Nigel Wade <nmw@ion.le.ac.uk>
Newsgroups comp.lang.java.programmer
Subject Re: Another question on Java keyword "this".
Date 2016-04-15 14:05 +0100
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>

Show all headers | 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.

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


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