Groups > comp.lang.java.programmer > #29454

Re: Help with methods, classes and parameters

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From	Scott Dunning <scottwd01@gmail.com>
Newsgroups	comp.lang.java.programmer
Subject	Re: Help with methods, classes and parameters
Date	Wed, 30 Jul 2014 22:01:00 -0700
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On 7/30/14, 6:43 PM, markspace wrote:
> On 7/30/2014 5:54 PM, Arne Vajhøj wrote:
>
>> One should just be aware that there are some (few but some) cases
>> where static and inner classes make sense.
>
> Just to toss out an example of static methods, when a class's purpose is
> only to provide functions (and sometimes helpful utility methods), you
> should make all the methods static, and make the class final and
> non-instantiable.
>
> For example, the java.lang.Math class contains only mathematical
> functions.  All of its methods are static, and the class itself it final
> and non-instantiable.
>
> package myproject;
>
> public class MyUtilities {
>
>    // all private ctors makes the class final and
>    // non-instantiable.
>
>    private MyUtilities() {}
>
>    public static void doThis() { ...
>    }
>
>    public static double calculateThat() { ...
>    }
>
> }
>
>
Thanks everyone, you helped me understand everything a lot more!

I have another quick question.  One of the options in in the menu is if 
the user enter 0 to quit the program.  I'm not sure how to go about that 
in the switch statement?

Thread

Help with methods, classes and parameters Scott Dunning <scottwd01@gmail.com> - 2014-07-29 22:58 -0700
  Re: Help with methods, classes and parameters Josip Almasi <joe@vrspace.org> - 2014-07-30 09:37 +0200
    Re: Help with methods, classes and parameters Scott Dunning <scottwd01@gmail.com> - 2014-07-30 16:59 -0700
      Re: Help with methods, classes and parameters Josip Almasi <joe@vrspace.org> - 2014-07-31 10:42 +0200
    Re: Help with methods, classes and parameters Scott Dunning <scottwd01@gmail.com> - 2014-07-30 17:29 -0700
    Re: Help with methods, classes and parameters Arne Vajhøj <arne@vajhoej.dk> - 2014-07-30 20:54 -0400
      Re: Help with methods, classes and parameters markspace <markspace@nospam.nospam> - 2014-07-30 18:43 -0700
        Re: Help with methods, classes and parameters Scott Dunning <scottwd01@gmail.com> - 2014-07-30 22:01 -0700
          Re: Help with methods, classes and parameters markspace <markspace@nospam.nospam> - 2014-07-31 09:45 -0700
            Re: Help with methods, classes and parameters Steven Simpson <ss@domain.invalid> - 2014-08-01 09:00 +0100
              Re: Help with methods, classes and parameters markspace <markspace@nospam.nospam> - 2014-08-01 09:07 -0700
            Re: Help with methods, classes and parameters Jukka Lahtinen <jtfjdehf@hotmail.com.invalid> - 2014-08-01 12:02 +0300
  Re: Help with methods, classes and parameters Jeff Higgins <jeff@invalid.invalid> - 2014-07-30 17:57 -0400

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