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  Using the Enumeration interface?  (Read 701 times)
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Offline Dreamcatchermatt

Junior Devvie

« Posted 2010-05-18 18:24:51 »

Hi all,

I'm using a custom binary tree data structure to store all my game objects.

I want to be able to use the for-each loop to itterate through my binary tree for things like calling the update and render methods on each of the elements.

I think that i can use the Enumeration interface to do this, but i'm not sure how. All the tutorials that I have found seem to be assuming that i'm using the enumeration interface with a class that already implements all the methods needed, so all I can find is -

You have a collection -> Black-Box MAGIC! -> enumeration now works

Anyone come across this before or have any hints?

Chears, Matt
Offline ryanm

Senior Devvie

Projects: 1
Exp: 15 years

Used to be bleb

« Reply #1 - Posted 2010-05-18 18:57:56 »

There's no magic I'm afraid, you've made a custom collection class so it's up to you to make it implement the appropriate interfaces. Also, to use with the for-each loop, you'll be wanting the Iterable and Iterator interfaces, rather than Enumeration. Have a look at the source of the existing Java collections for clues as to how to go about implementing them.
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