Question

In Objective-C I use a Notification to do some tasks, which required some time to process. I can listen to the Notification, until it is ready…
For example:

  [[NSNotificationCenter defaultCenter] addObserver:objectB
                                           selector:@selector(objectReceived:)
                                               name:@"objectATasks"
                                             object:nil];
  [objectA doALongProcess]; 

When the objectA is finished the task, the @”objectATasks” will be fired, and the objectB’s objectReceived: will be called. Do have have similar things / concept in java? Thank

Answer 1

You can make use of the Observer design pattern in java