Deck 18: Swing II

Question 1

The method paint has one parameter of type:
(a)Shape
(b)Graphics
(c)Image
(d)String

Answer 1

B

Question 2

Icons can be added to:
(a)JLabels
(b)JButtons
(c)JMenuItems
(d)all of the above

Answer 2

D

Question 3

An invocation of the Container class method _____________ updates components on the screen.
(a)setVisible
(b)setLayout
(c)update
(d)validate

Answer 3

D

Question 4

Java uses a coordinate system whose origin point (0,0)is located at the upper-left corner of the screen area.

Question 5

If the policies for scroll bars are never set then the scroll bars will never be visible.

Question 6

An imaginary _____________ is used for drawing all shapes on the screen.
(a)bounding box
(b)view port
(c)container
(d)none of the above

Question 7

The Insets class is in the package ______________.
(a)java.awt
(b)javax.swing
(c)java.util
(d)java.lang

Question 8

When using scroll bars,the text is viewed through a ______________ that shows only part of the text at a time.
(a)view port
(b)text area
(c)all of the above
(d)none of the above

Question 9

All of the following are methods of the Graphics class except:
(a)drawRect
(b)fillRect
(c)coloredRect
(d)fill3DRect

Question 10

You can use the Java method ______________ from the Color class to change the drawing color.
(a)changeColor
(b)getColor
(c)setColor
(d)useColor

Question 11

The Graphics class is a(n)____________ class.
(a)discrete
(b)concrete
(c)abstract
(d)none of the above

Question 12

A view port shows only part of the text at one time.

Question 13

All of the following are methods of the class Color except:
(a)getRed
(b)brighter
(c)darker
(d)dimmer

Question 14

The dispose method of the JFrame class terminates a Java program.

Question 15

To by pass implementing all methods in the WindowListener interface,make the window listener a derived class of:
(a)WindowEvent
(b)ActionEvent
(c)WindowAdapter
(d)None of the above

Question 16

A window listener must define all the method headings in the WindowListener interface,even if some are trivial implementations.

Question 17

Any change to graphics being displayed on the screen requires a call to the method ____________ to update the graphics.
(a)paint
(b)repaint
(c)update
(d)all of the above

Question 18

The paint method of the Graphics class can only be used with Applets.

Question 19

The class JFrame has a method named __________ that eliminates the invoking JFrame without terminating the program.
(a)close
(b)dispose
(c)eliminate
(d)None of the above

Question 20

When the user clicks any of the three standard JFrame buttons,a ___________ is generated.
(a)window listener
(b)window event
(c)window activator
(d)window deactivator

Question 21

A rounded rectangle is a rectangle whose corners have been replaced by arcs.

Question 22

Write a Java statement that draws a filled oval at position (150,100)with a height of 100 and a width of 50.

Question 23

The class JColorChooser can be used to produce a dialog window that allows you to choose a color by looking at color samples.

Question 24

The Java Color class mixes amounts of red,green and yellow to produce any new color you might want.

Question 25

Write a Java statement that uses a Graphics object to display "Hello World" at position 50,100.

Question 26

The drawArc method of the Graphics class requires a starting angle.A positive starting angle indicates a clockwise direction.

Question 27

Write Java statements to add the icon created in number 1 above to a label that says "Love".

Question 28

Explain the Java coordinate system for graphic objects.

Question 29

Write a Java statement to create an image icon for the image heart.gif.

Question 30

Set policies for the scroll bar created in number 3 above.

Question 31

Write a Java statement to create a scroll pane for a text area named productDescription.