Time to Play!

Question Time I am going to ask you questions, picking someone at random.

1. What type of variable can have a lambda assigned to it?
2. What do MenuItems and Buttons have in common?
3. Where do you normally put a menu bar in a Stage?
4. What is the correct order of occurence of these events?
   • stop is called.
   • init is called.
   • start is called.
   • constructor executes.
5. How does an HBox act if several items are added it it?
6. How does a VBox act if several items are added it it?

Answers

1. Variables of functional interface type.
2. Both have a setOnAction Method.
3. It goes in the top of a BorderPane.
4. What is the correct order of occurence of these events?
   • constructor
   • init
   • start
   • stop
   • They fill in horizontally.
   • They fill in vertically

For this exercise you will need to learn how to use a GridPane. Put it in the center of a border pane and put a textfield on the top. Place a 0 in the text field.

Put the number buttons into the GridPane, which you will place in the center of the GridPane.

       -----------------------------------------
       |  Put a textfield here with a 0 in it  |
       -----------------------------------------
       | 7 | 8 | 9 |                           |
       | 4 | 5 | 6 |                           |
       | 1 | 2 | 3 |                           |
       | . | 0 | E |                           |
       -----------------------------------------

I will enable screen sharing and we can look at what everyone is doing.