Does Java have native support for events, similar to that of C#?

Question

I\'m a bit confused from what I\'ve heard Java doesn\'t do events.

But I know that it does GUI events.

Am I missing something? Does java have an event handli

Answer 1

The Subscribe/Publish mechanism proposed by others here will let you implement synchronous events. For asynchronous event loops (fire and forget) You may want to look at "actors". An Actor consists of a handler for messages (events) of type A, as well as a threading strategy for executing the handler. This lets you do concurrent, asynchronous event handling like the following:

public class EventExample {
  public static void main(String[] args) {
    while ((char c = System.in.read()) >= 0) {
      eventHandler.act(c);
    }
  }

  public static Actor eventHandler =
    Actor.actor(Strategy.simpleThreadStrategy(), new Effect() {
      public void e(Character c) {
        // Do something with c here.
      }
    });
}

Get the actors library here. See the Javadoc here.