Understand Command Pattern in Swing

Question

I can see how Swing uses Decorator and Observer pattern.

Observer: Every component(eg. JButton) is a subject which can add observers(ActionListeners). When someone pushes a button it notifies all its ActionListeners by calling their actionPerformed(ActionEvent e).

But how about Command Pattern?

When I am making classes that implements ActionListener (eg: MyActionListener) the actionPerformed(ActionEvent e) is now the execute command?

It confuses me that actionPerformed(ActionEvent e) is used both as a execute() and a update() method. Am I right here?

Answer 1

Here is an article that will help. Basically, it is saying you can create concrete command classes that interact with a target object by deriving the ActionListener. Then you can expand what an action event invoker will do by registering these decoupled commands to it.