question about using "new"

[Paul Chamsay]

Hi,

I'm just wondering what's the difference of doing this:

     class IceCream
   {
       public static void main(String[] args)
      {		  
		  new IceCream().go();
      }
}
   

as opposed to this

     class IceCream
   {
       public static void main(String[] args)
      {		  
		  IceCream ic = new IceCream();
                  ic.go();
      }
}
   

Are there any performance implications? Which "style" is more recommended? Thanks!

[Dawn Charangat]

"style" 2

owing to readability and hence better maintainability.

Also, if you need to use the instance of "IceCream" for further tasks within your class, you'll need a reference to that object, which you wont get, if you use the first way.

[Hunter McMillen]

They both do the same thing, your second example is better style because what would happen if you wanted to call another method on new Icecream()?

    
     class IceCream
   {
       public static void main(String[] args)
      {		  
		  new IceCream().go().print(); //you cant do this
      }
}
   

     class IceCream
   {
       public static void main(String[] args)
      {		  
		  IceCream ic = new IceCream();
                  ic.go();
                  ic.print(); //you can do this
      }
}
      
 

Hunter.

[Gregg Bolinger]

Hunter McMillen wrote:They both do the same thing, your second example is better style because what would happen if you wanted to call another method on new Icecream()?

    
     class IceCream
   {
       public static void main(String[] args)
      {		  
		  new IceCream().go().print(); //you cant do this
      }
}
   

Hunter.

Well, you can do that if go() returns an instance of IceCream. I'd argue that one method isn't better than the other if all you need to do is instantiate the class and/or call a single method. The whole "what happens when..." is when your tests deem it necessary and you refactor.