revised: 10/05/03

on on Swing Frames

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Instructions: For each question, choose the single best answer. Make your choice by clicking on its button. You can change your answers at any time. When the quiz is graded, the correct answers will appear in the box after each question.

1. In Java, what do you call an area on the screen that has nice borders and various buttons along the top border?

A.    A window.
B.    A screen.
C.    A box.
D.    A frame.

2. What is the name of the Swing class that is used for frames?

A.    Window
B.    Frame
C.    JFrame
D.    SwingFrame

3. What method sets the size of the displayed JFrame?

A.    setSize( int width, int height)
B.    setSize( int height, int width)
C.    setVisible( int width, int height)
D.    setVisible( int height, int width)

4. The size of a frame on the screen is measured in:

A.    inches
B.    nits
C.    dots
D.    pixels

5. What is a container object in GUI programming?

A.    A container is another name for an array or vector.
B.    A container is any class that is made up of other classes.
C.    A container is a primitive variable that contains the actual data.
D.    A container is an object like a frame that has other GUI components placed inside of it.

6. Fill in the blanks so that this program displays a JFrame:

import java.awt.*;

public class microGUI
  public static void main ( String[] args )
    JFrame frm = new ___________();
    frm.___________( 150, 100 );
    frm.___________( true );

A.    Form, setVisible, setOn
B.    JFrame, setSize, setVisible
C.    Frame, setVisible, setSize
D.    Window, setSize, paint

7. Which of the following sets the frame to 300 pixels wide by 200 high?

A.    frm.setSize( 300, 200 );
B.    frm.setSize( 200, 300 );
C.    frm.paint( 300, 200 );
D.    frm.setVisible( 300, 200 );

8. Fill in the blanks so that the following draws a frame containing "Hello".

import java.awt.*; 

class helloFrame ___________ JFrame
  public void ___________( Graphics g )
    g.___________("Hello", 10, 50 );                                                 

public class Tester
  public static void main ( String[] args )
    helloFrame frm = new helloFrame();  
    frm.setSize( 150, 100 ); 
    frm.setVisible( true );

A.    import, drawString, paint
B.    extends, paint, drawString
C.    extends, draw, paint
D.    include, drawString, paint

9. When is the paint() method of a frame object called?

A.    The user calls it to display the frame.
B.    The main() method calls it once when the program starts.
C.    The Java system calls it every time it decides to display the frame.
D.    The Java system calls it once when the program starts.

10. What is a Graphics object?

A.    The Graphics object represents the part of the Frame that you can draw on.
B.    The Graphics object represents the whole Frame.
C.    The Graphics object represents the entire monitor.
D.    The Graphics object represents the graphics board.

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