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From: markspace <markspace@nospam.nospam>
Newsgroups: comp.lang.java.programmer
Subject: Re: Help with methods, classes and parameters
Date: Wed, 30 Jul 2014 18:43:44 -0700
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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() { ...
   }

}