Deck 18: Swing II

Question 1

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

Answer 1

True

Question 2

All of the following are methods of the class Color except:

A)getRed
B)brighter
C)darker
D)dimmer

Answer 2

D

Question 3

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

Answer 3

A

Question 4

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

Question 5

The Insets class is in the package ______________.

A)java.awt
B)javax.swing
C)java.util
D)java.lang

Question 6

The method paint has one parameter of type:

A)Shape
B)Graphics
C)Image
D)String

Question 7

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

Question 8

An invocation of the Container class method _____________ updates components on the screen.

A)setVisible
B)setLayout
C)update
D)validate

Question 9

Icons can be added to:

A)JLabels
B)JButtons
C)JMenuItems
D)all of the above

Question 10

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 11

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 12

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

Question 13

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 14

The Graphics class is an)____________ class.

A)discrete
B)concrete
C)abstract
D)none of the above

Question 15

You can use the Java method ______________ from the Color class to change the drawing color.

A)changeColor
B)getColor
C)setColor
D)useColor

Question 16

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 17

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

Question 18

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

Question 19

All of the following are methods of the Graphics class except:

A)drawRect
B)fillRect
C)coloredRect
D)fill3DRect

Question 20

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 21

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

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

Explain the Java coordinate system for graphic objects.

Question 24

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

Question 25

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

Question 26

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

Question 27

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

Question 28

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

Question 29

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

Question 30

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

Question 31

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