The Actor Foundry (http://yangtze.cs.uiuc.edu/foundry/) is a JavaLanguage implementation of the ActorsModel.

Here is a simple example of Actor Foundry code, that creates an actor and sends it two messages:

 package osl.examples.xampi;
 import osl.manager.*;
 import osl.util.*;

 public class Xampi extends Actor {

   public void boot() throws RemoteCodeE''''''xception {
     Actor''''''Name a2 = create("osl.examples.xampi.Xampi");
     send(a2, "relayPrint", "Hi there");
     send(a2, "relayPrint", "Lo there");
   }

   public void relayPrint(String item) {
     send(stdout, "println",  "Xampi relays "+item);
     Debug.out.println("Xampi prints "+item);
   }
 }

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Also see ActorsModel, ActorLanguages.