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Groups > comp.lang.java.programmer > #16176

Re: How to not use casting to invoke the methods of a List of objects

From Roedy Green <see_website@mindprod.com.invalid>
Newsgroups comp.lang.java.programmer
Subject Re: How to not use casting to invoke the methods of a List of objects
Date 2012-07-20 21:22 -0700
Organization Canadian Mind Products
Message-ID <9hbk0892evf5rhp3p0verr6qhq8g447823@4ax.com> (permalink)
References <61dca380-4364-4713-aa27-e885f96632ea@googlegroups.com>

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On Fri, 20 Jul 2012 06:58:49 -0700 (PDT), clusardi2k@aol.com wrote,
quoted or indirectly quoted someone who said :

>Below uses a List of objects of class Route. Class Route has public member =
>variables (such as locationid) and public methods (such as get_locationid()=
>). The below code is a first attempt at a way to obtain the value of locati=
>onid using casting. Question: What is the code to do it a better way.

see http://mindprod.com/jgloss/generics.html

Generics let you tell the compiler what types you are hiding in your
collections so it can do the casting for you.
-- 
Roedy Green Canadian Mind Products
http://mindprod.com
The greatest shortcoming of the human race is our inability to understand the exponential function. 
 ~ Dr. Albert A. Bartlett (born: 1923-03-21 age: 89)
http://www.youtube.com/watch?v=F-QA2rkpBSY

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Thread

How to not use casting to invoke the methods of a List of objects clusardi2k@aol.com - 2012-07-20 06:58 -0700
  Re: How to not use casting to invoke the methods of a List of objects markspace <-@.> - 2012-07-20 07:21 -0700
    Re: How to not use casting to invoke the methods of a List of objects clusardi2k@aol.com - 2012-07-20 08:09 -0700
  Re: How to not use casting to invoke the methods of a List of objects Joerg Meier <joergmmeier@arcor.de> - 2012-07-20 17:45 +0200
    Re: How to not use casting to invoke the methods of a List of objects Robert Klemme <shortcutter@googlemail.com> - 2012-07-20 18:03 +0200
      Re: How to not use casting to invoke the methods of a List of objects Joerg Meier <joergmmeier@arcor.de> - 2012-07-20 18:59 +0200
  Re: How to not use casting to invoke the methods of a List of objects Roedy Green <see_website@mindprod.com.invalid> - 2012-07-20 21:22 -0700
  Re: How to not use casting to invoke the methods of a List of objects Lew <noone@lewscanon.com> - 2012-07-21 23:34 -0700

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