Java ArrayList in AS extension

[crickeys]

I'm using a java ArrayList in an AS2 Extension (For those who don't know, yes you can do this). The instantiation for the arraylist is as follows:

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 var myList = new java.util.ArrayList();

Into the list I am putting userIDs as follows:

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myList .add(new java.lang.Integer(userID));

If I later loop through the list with the following code:

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for (var it = myList.iterator(); it.hasNext();)
{

		userID= it.next();
		
		// get the user
		tUser = _server.getUserById(userID);
}

then I get this error:

error in extension [ myExt.as ]: Wrapped java.lang.ClassCastException (roomSpill.as#507) Internal: -976 -- Line number: (MainLib line: 507)

I believe the error occurs at the _server.getUserById(userID); function. Why is this occurring? What am I missing?

Thanks,

Brian

[Lapo]

probably it's no biggie, try to avoid this:

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myList .add(new java.lang.Integer(userID)); 

and use the number itself:

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myList .add(userID);

btw... is there a specific reason for not using a regular AS list?

[crickeys]

Thanks Lapo! Sorry for my delay in response.

I am actually trying to solve the following problem:

I have a game in which people can form GROUPS and FOLLOW each other. So, if one the leader moves, then anyone following will go to the same place.

I was concerned about the speed and efficiency of the Actionscript Array vs java's ArrayLists, HashMap, etc. I wanted to ensure that if we get a large number of groups and need to update them quickly, search them, etc. this would not become a bottleneck.

Maybe there's a better way that I'm not seeing?

[Lapo]

I was concerned about the speed and efficiency of the Actionscript Array vs java's ArrayLists, HashMap, etc.

If you are concerned with performance I'd suggest to user Java instead of Actionscript. The performance gain is huge. Only using the Java collections in Actionscript won't do that much, although it might help