Java-Gaming.org    
Featured games (91)
games approved by the League of Dukes
Games in Showcase (576)
games submitted by our members
Games in WIP (497)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
 
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  Threads for long computations?  (Read 290 times)
0 Members and 1 Guest are viewing this topic.
Offline nhmllr

Senior Member


Medals: 1
Projects: 3


slow and steady...


« Posted 2013-05-20 01:17:42 »

I want to just play around with AI for a bit now. I want to see if I can make a relatively decent chess AI. It will probably not work, but whatever.

In any case, when I make a game, I have it work through a series of "ticks," that is every 60th of a second the game "ticks," runs through all of it's code, then will tick again later.

Usually my computations are very small, so it runs just fine. However, what if I want to do 5 seconds worth of computations before the computer moves? I would want the game to continue "ticking" 60 times a second, except be running it's computations in the background.

Now, I know about threads and whatnot, but I don't understand how to implement them into my code in this sort of situation. Could anybody point me in a direction, or give me some tips for going in such a direction?

Thanks
Offline Troncoso

JGO Coder


Medals: 20



« Reply #1 - Posted 2013-05-20 01:36:19 »

A basic thread is relatively simple in Java, using the Thread class.

The idea is you create a new Thread object and pass it an object that implements the Runnable interface:

1  
Thread t = new Thread(runnableObject);


The Runnable interface has a single method you must implement called run(). This is the code that'll run in a separate thread. To execute it, you do start:

1  
t.start();


And that's all there is to it. Again, at a basic level. This should be enough, if all you need to do is run some calculations in a separate thread.
Offline nhmllr

Senior Member


Medals: 1
Projects: 3


slow and steady...


« Reply #2 - Posted 2013-05-20 01:37:19 »

It's hard to believe it's so simple :p
I'll give it a shot, thanks
Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline Troncoso

JGO Coder


Medals: 20



« Reply #3 - Posted 2013-05-20 01:38:48 »

Check this out for more details on concurrency and the Thread class: http://docs.oracle.com/javase/tutorial/essential/concurrency/index.html
Offline DrZoidberg

Senior Member


Medals: 10



« Reply #4 - Posted 2013-05-20 02:51:58 »

Here is an example with Futures.

1  
2  
3  
4  
5  
6  
7  
8  
9  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
import java.util.concurrent.Future;
import java.util.concurrent.ForkJoinPool;
import java.util.concurrent.Callable;

public class Test {
   
    static int fib(int n) {
        if(n < 2) return n;
        else return fib(n-1) + fib(n-2);
    }
   
    public static void main(String[] args) throws Exception {
        ForkJoinPool pool = new ForkJoinPool();
        Future<Integer> future = pool.submit(new Callable<Integer>() {
            public Integer call() {
                System.out.println(Thread.currentThread());
                return fib(45);
            }
        });
        System.out.println(Thread.currentThread());
        while(!future.isDone()) {
            System.out.println("running");
            Thread.sleep(500);
        }
        System.out.println(future.get());
    }
}
Pages: [1]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 

Add your game by posting it in the WIP section,
or publish it in Showcase.

The first screenshot will be displayed as a thumbnail.

xsi3rr4x (12 views)
2014-04-15 18:08:23

BurntPizza (11 views)
2014-04-15 03:46:01

UprightPath (24 views)
2014-04-14 17:39:50

UprightPath (10 views)
2014-04-14 17:35:47

Porlus (27 views)
2014-04-14 15:48:38

tom_mai78101 (49 views)
2014-04-10 04:04:31

BurntPizza (108 views)
2014-04-08 23:06:04

tom_mai78101 (208 views)
2014-04-05 13:34:39

trollwarrior1 (176 views)
2014-04-04 12:06:45

CJLetsGame (182 views)
2014-04-01 02:16:10
List of Learning Resources
by Longarmx
2014-04-08 03:14:44

Good Examples
by matheus23
2014-04-05 13:51:37

Good Examples
by Grunnt
2014-04-03 15:48:46

Good Examples
by Grunnt
2014-04-03 15:48:37

Good Examples
by matheus23
2014-04-01 18:40:51

Good Examples
by matheus23
2014-04-01 18:40:34

Anonymous/Local/Inner class gotchas
by Roquen
2014-03-11 15:22:30

Anonymous/Local/Inner class gotchas
by Roquen
2014-03-11 15:05:20
java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!