GUIs

Question 1

What does MVC stand for?

Answer 1

Model-View-Controller

Question 2

What is each part of the MVC?

Answer 2

Model - How information is represented internally
View - How information is presented externally
Controller - User input

Question 3

What part of MVC does Java method calls fit into?

Answer 3

Model

Question 4

What part of MVC do mouse or keyboard events fit into?

Answer 4

Controller

Question 5

What part of MVC does the outward appearance of a program fit into?

Answer 5

View

Question 6

What does GUI stand for?

Answer 6

Graphical User Interface

Question 7

What does WIMP stand for?

Answer 7

Windows, Icons, Menus, Pointers

Question 8

What are modern GUI libraries usually called?

Answer 8

Toolkits

Question 9

What do modern GUI libraries usually contain?

Answer 9

Widgets

Question 10

What are some examples of widgets?

Answer 10

Buttons, Sliders, Menus

Containers which give structure to the GUI

Question 11

What are the 2 java GUI libraries?

Answer 11

java. awt (abstract windowing toolkit)

javax. swing (swing library)

Question 12

How do swing components distinguish themselves from awt components?

Answer 12

They have “J” in front of them (e.g. JList, JMenu)

Question 13

What is a JFrame?

Answer 13

A window for a GUI in java

Question 14

How do you create a JFrame object?

Answer 14

JFrame frameName = new JFrame(“frame name”);

Question 15

What are the 4 options for setDefaultCloseOperation on a JFrame?

Answer 15

DO_NOTHING_ON_CLOSE
HIDE_ON_CLOSE (the default)
DISPOSE_ON_CLOSE (usually best for non-main frame)
EXIT_ON_CLOSE (implemented directly in JFrame and should usually only be done for the main frame)

Question 16

What are each of the 4 parameters for in setBounds(a,b,c,d) (method for a JFrame)

Answer 16

All parameters are integers.
a and b set position like x-y co-ordinate
c and d set width and height respectively

Question 17

What is another sizing method for a JFrame as an alternative to setBounds?

Answer 17

pack()

This will size the frame to fit the components within it

Question 18

What does the setVisible() method do and what parameter does it take?

Answer 18

setVisible takes a boolean value and makes the frame visible or not visible

Question 19

What are some common components used to populate a JFrame window?

Answer 19

JLabel
JButton
JTextField - one line of editable text
JTextArea - multiple lines of editable text
JCheckbox
JRadioButton - usually part of a ButtonGroup
JComboBox

Question 20

What is an event?

Answer 20

an event is an object created whenever something happens

Question 21

Where do events come from?

Answer 21

They are created by a source (usually a widget) and the type of event represents what has happened (e.g. button press, mouse move)

Question 22

How are events used?

Answer 22

They are ignored or interpreted by listeners