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        Arimaa >> Bot Development >> Sample Java Bot
        
(Message started by: omar on Mar 10^th, 2006, 7:32pm)

Title: Sample Java Bot
Post by omar on Mar 10^th, 2006, 7:32pm

Jeff Bacher (developer of bot Clueless) has contributed
a sample Arimaa bot written in Java. Developers can
simply enhance the evaluation function to build their
own bot. I've added it to the download page:

http://arimaa.com/arimaa/download/

Thanks Jeff.

Title: Re: Sample Java Bot
Post by IdahoEv on Mar 10^th, 2006, 8:43pm

Hey, that's pretty cool; I'm developing in Java as well.

I was thinking of releasing my class library that models all the basis elements of Arimaa, but looking at jeff's it may not be necessary; they cover most of the same ground (although in a rather different way; Jeff's code is very "C-like", mine is more like what you'd see in a design patterns textbook. Which means mine is undoubtedly much slower...). It might just add confusion to have two incompatible java classlibs floating around.

But thanks much for releasing this; I've pretty much only been working on my eval function, figuring I'd code a tree searcher in Java down the road some day (or port to C). This will help quite a bit.

Title: Re: Sample Java Bot
Post by asfaklive on Jan 27^th, 2010, 12:00am

I have downloaded his program and found in the main he wrote a comment

// Used for testing purposes
// String file_name = "c:/arimaa/bot/running/gamestate804";
// execute(file_name);

Where can I find such a file so that I can check the program first without any effort?

Can anybody provide me with such a file so that I can start a test of the bot?

Regards.

[Sorry previously I have posted this message in the general discussion with title "About 'Arimaa Sample Java Bot' made by Jeff Bacher"]

Title: Re: Sample Java Bot
Post by jdb on Jan 27^th, 2010, 7:02am

The test you mentioned was for testing the gameroom interface. It is not necessary to know about that to use the engine.

To run the engine intself, I suggest starting in ArimaaEngine. It contains a program entry point that allows the engine to run on its own.

Title: Re: Sample Java Bot
Post by asfaklive on Jan 27^th, 2010, 9:11pm

Hi !

Thanks for the reply. I have tried that. But I am getting java.lang.OutOfMemoryError: Java heap space error. I am using eclipse IDE.

I have tried to run the app with

-Xmx500000000 but it is still showing the same error.

Would you please recommend a valid heapsize for this?
or Am I missing anything?

Title: Re: Sample Java Bot
Post by asfaklive on Jan 30^th, 2010, 8:39pm

The exception I am always getting

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at arimaa3.ArimaaMove.<init>(ArimaaMove.java:8)
at arimaa3.HashTable.<init>(HashTable.java:30)
at arimaa3.ArimaaEngine.<init>(ArimaaEngine.java:433)
at arimaa3.ArimaaEngine.main(ArimaaEngine.java:1314)

May I get any suggestions?

Regards.

Title: Re: Sample Java Bot
Post by omar on Feb 1^st, 2010, 7:45am

Jeff can probably give you more details later, but I think you can reduce the heap size until you find something that works.

Try something like:
java -Xmx30000000 -classpath test.jar arimaa_bb.ArimaaMain

to give 30 MB for the heap.

Title: Re: Sample Java Bot
Post by asfaklive on Feb 2^nd, 2010, 11:51pm

No, that does not work, too.

By the way, now I am trying to understand the sample perl bot.

Regards.

Title: Re: Sample Java Bot
Post by jdb on Feb 3^rd, 2010, 6:47am

on 01/27/10 at 21:11:09, asfaklive wrote:

500Mb should be plenty for the heap. Maybe eclipse is doing something. Have you tried running it from the command line?