Question 1

For each of the following, name the design pattern that the described situation exploits.

1. Adding a JScrollPane to a JTextArea object and being able to use either as a GUI component

   
   

2. Using a LayoutManager to hide the details of layout from a container object.

   
   

3. Being able to call getPreferredSize on both a JButton and a JPanel.

   
   

4. Implementing a polymorphic method by calling primitive methods.

   
   

5. Being able to successively find tokens within a string without keeping track of a string position.

   
   

6. Automatically updating the view of a table when the table's data changes.

   
   

For each of the following, name the design pattern that the described situation exploits.

1. Adding a JScrollPane to a JTextArea object and being able to use either as a GUI component

   Decorator

2. Using a LayoutManager to hide the details of layout from a container object.

   Strategy

3. Being able to call getPreferredSize on both a JButton and a JPanel.

   Composite

4. Implementing a polymorphic method by calling primitive methods.

   Template Method

5. Being able to successively find tokens within a string without keeping track of a string position.

   Iterator

6. Automatically updating the view of a table when the table's data changes.

   Observer