Intro to Gui and Swing

Question 1

Layout Manager

Answer 1

1. Asks components for their preferred size, before making a decision about the layout
2. Control the size and location of components nested within other components

Question 2

Component

Answer 2

A correct term for what we’ve been calling a widget. The things you put in a GUI. The things a user sees and interacts with

Question 3

Border layout

Answer 3

1. The default layout manager for a frame

2. Let’s you add a component to one of five regions

Question 4

Flow layout

Answer 4

1. The default layout manager for a panel
2. Gives components their preferred size in both dimensions
3. Places components left to right, top to bottom, in the order they were added

Question 5

Box layout

Answer 5

1. The default layout manager for a frame

2. Let’s you align components stacked vertically, even if they could fit side-by-side

Question 6

background component

Answer 6

1. When you add a component to another component

2. The added component is controlled by the layout manager of the background component

Question 7

How come you can’t add directly to a frame the way you can to a panel?

Answer 7

A JFrame is special because it’s where the rubber meets the road in making something appear on the screen

Question 8

What if I want a different preferred size? Is there a setSize() method for components?

Answer 8

Yes, there is a setSize(), but the layout manager will ignore it

Question 9

Can I turn the layout managers off?

Answer 9

Yes. On a component by component basis, you can call setLayout(null)

Question 10

setLayout()

Answer 10

To allow a panel to use something other than flow

Question 11

JTextArea

Answer 11

Input more than one line of text

Question 12

JFrame

Answer 12

The object that represents a window on the screen. It’s where you put all the interface things like buttons, checkboxes, text fields, and so on

Question 13

Will a button look like a Windows button when you run on Windows?

Answer 13

If you want it to. The standard Java look and feel, also known as Metal, and the native look and feel for your platform

Question 14

Event-handling

Answer 14

The process of getting and handling a user event

Question 15

Listener interface

Answer 15

The bridge between the listener and event source

Question 16

Swing GUI components

Answer 16

Event sources

Question 17

Event sources

Answer 17

1. An object that can turn user actions into events

2. Creates event object when the user does something that matters

Question 18

Listener

Answer 18

To implement the interface, register with the button, and provide the event-handling

Question 19

Event source (Job)

Answer 19

To accept registrations from listener, get events from the user

Question 20

Inner class

Answer 20

1. Gets to use those variables and methods just as if the methods and variables were declared within the inner class
2. Inner object shares a special bond with an outer object