Swing Design Patterns

Question 1

What is a design pattern?

Answer 1

• an example of ideal design

- halfway between architecture and code

Question 2

WHat is the idea of the composite pattern?

Answer 2

allows you to bild recursive trees by composition whose nodes all behave in the same way

Question 3

What is the suggested approach we building a GUI?

Answer 3

• Create JFrame with construction method

- Create JPanel subclasses each with specific construciton method

Question 4

What are the 4 main strategies to deal with event handlers?

Answer 4

• Main JFrame handles everything
• Each JPanel handles evetns of own widgets
• Each JButton is its own handler
• Separate handler class

Question 5

What is the main idea of the Observer pattern?

Answer 5

2 Halves; subject & observer

When event happens to subject, observers are notified

Question 6

Describe each part of Model-View-Controller architecture

Answer 6

Model; models business domain
View; contains all GUI objects
COntroller; event handlers to synchronise view with model data

Question 7

What are the 3 parts of the model delegate architecture?

How can it be simplified?

Answer 7

Frame (view)
Listener (Controller)
Application (model)

Can combine frame and listener into one object