Cogito Engineering

1. In a Java source code file:
   1. Right-click, select Add Java Event.
      
      
      
      
2. In the New Event Wizard:
   1. Type in the name of an event (e.g. CountChanged).
   2. Click Finish.
      
      
3. The following code will be added by the wizard:
   1. In the current class:
      1. A list variable to hold references to observers:
         
private ArrayList<CountChangedListener> countChangedListeners = new ArrayList<>();
          
      2. Add methods to add and remove observers:
         
         public void addCountChangedListener( CountChangedListener listener) {
   countChangedListeners.add(listener);
}

public void removeCountChangedListener(CountChangedListener listener) {
   countChangedListeners.remove(listener);
}
         
         
      3. Add a method to fire events (i.e. inform observers of the change):
         
private void fireCountChanged() {
   for (CountChangedListener listener : countChangedListeners)
     listener.countChanged(new CountChangedEvent(this));
   }
}
         
         
   2. To the package
      1. An interface called CountChangedListener with a single method called countChanged().

Note: the alternate installation method circumvents Eclipse's built-in configuration management system, making updates to the Java Event Wizard more difficult (essentially requiring the developer to manually remove the old plug-in files and directories prior to installation of a new version).  For this reason, it is recommended that the standard installation procedure described above be used.  If you still want to perform a manual install, simply follow these steps:

1. Download com.cogitoresearch.eclipse.javaeventwizard_1.0.0.jar.
2. Copy the jar file into plugins subfolder of your eclipse folder.