Here is the famous "Hello World!" example for ActorFoundry.
package osl.examples.helloworld;
import osl.manager.*;
import osl.util.*;
import osl.manager.annotations.message;

public class HelloWorld extends Actor {

  @message public void boot() throws RemoteCodeException {
    ActorName a2 = create("osl.examples.helloworld.HelloWorld");
    send(a2, "relayGreeting", "Hello ");
    send(a2, "relayAudience", "World!");
  }

  @message public void relayGreeting(String item) {
    send(stdout, "print",  item);
  }

  @message public void relayAudience(String item) {
    send(stdout, "println",  item);
  }
}