QUESTION 1

Complete the following statement to construct a circle. Graphics g; g.____________________(x, y, width, height);

		drawCircle
		drawOval
		fillCircle
		DrawOval

2 points

QUESTION 2

The methods of a/an ____ describe the actions to be taken when an event occurs.

		event source
		event listener
		event interface
		action source

2 points

QUESTION 3

Which of the following statements creates a button with "Calculate" as its label?

		Button JButton = new Button("Calculate")
		button = new Button(JButton, "Calculate")
		Button = new JButton("Calculate")
		JButton button = new JButton("Calculate")

2 points

QUESTION 4

Event listeners are often installed as ____ classes so that they can have access to the surrounding fields, methods, and final variables.

		Inner
		Interface
		Abstract
		Helper

2 points

QUESTION 5

Which of the following statements will compile without error?

		public interface AccountListener() { void actionPerformed(AccountEvent event); }
		public interface AccountListener() { void actionPerformed(AccountEvent); }
		public interface AccountListener { void actionPerformed(AccountEvent event); }
		public abstract AccountListener { void actionPerformed(AccountEvent event); }

2 points

QUESTION 6

When an event occurs, the event source notifies all associated ____.

		components
		panels
		interfaces
		event listeners

2 points

QUESTION 7

Complete this code fragment to ensure that the application exits properly when the user closes the frame: JFrame frame = new JFrame();

		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		JFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		JFrame.setCloseOperation(JFrame.EXIT);
		frame.setCloseOperation(JFrame.EXIT);

2 points

QUESTION 8

To draw an ellipse, you must include which of the following import statements?

		import java.awt.Graphics;
		import javax.awt;
		import javax.swing.JPanel;
		import java.awt.Ellipse;

2 points

QUESTION 9

An inner class can access local variables from the enclosing method only if they are declared as ____.

		private
		public
		static
		final

2 points

QUESTION 10

Which of the following statements about an inner class is true?

		An inner class may not be declared within a method of the enclosing scope.
		An inner class may only be declared within a method of the enclosing scope.
		An inner class can access variables from the enclosing scope only if they are passed as constructor or method parameters.
		The methods of an inner class can access variables declared in the enclosing scope.

2 points

QUESTION 11

Consider the following code snippet: JFrame frame = new JFrame(); JPanel panel = new JPanel(); Which statement would add the panel to the frame?

		frame.add(panel);
		frame.add(JPanel panel);
		frame.addComponent(panel);
		frame.addComponent(JPanel panel);

2 points

QUESTION 12

Consider the following code snippet: public static void main(String[] args) { Order myOrder = new Order(); JButton button = new JButton("Calculate"); JLabel label = new JLabel("Total amount due"); . . . class MyListener implements ActionListener { public void actionPerformed(ActionEvent event) { label.setText("Total amount due " + myOrder.getAmountDue()); } } } What is wrong with this code?

		label must be declared as final.
		myOrder must be declared as final.
		label and myOrder must be declared as final.
		label and button must be declared as final.

2 points

QUESTION 13

What happens if a text field's width is set to 10 characters and the user types more characters into it?

		The user interface automatically widens the field's width.
		An InputMismatchException is thrown.
		The earlier characters are deleted and only the last ten are shown and entered.
		The characters are entered but only those that fit into the width are shown.

2 points

QUESTION 14

How do you specify what the program should do when the user clicks a button?

		Specify the actions to take in a class that implements the ButtonListener interface.
		Specify the actions to take in a class that implements the ButtonEvent interface .
		Specify the actions to take in a class that implements the ActionListener interface.
		Specify the actions to take in a class that implements the EventListener interface.

2 points

QUESTION 15

Which of the following statements about events and graphical user interface programs is true?

		Your program must indicate the specific types of events to which it wishes to respond.
		Your program will automatically receive notifications about all events that have occurred.
		Your program must respond to notifications of all types of events that are sent to it while it is running.
		Your program must override the default methods to handle events. 11)____ are generated when the user presses a key, clicks a button, or selects a menu item. a) Listeners b) Interfaces. *c) Events. d) Errors.

2 points

QUESTION 16

What's the difference between a text field and a text area?

		A text field is used for input only and a text area is used for output only.
		A text field can be edited by the user but a text area cannot.
		A text area can have scroll bars but a text field cannot.
		A text field is for a single line of text and a text area is for multiple lines of text.

2 points

QUESTION 17

Based on the following statement, which of the following statements sets the title of the frame: JFrame frame = new JFrame();

		frame.title = "An Empty Frame";
		frame.setTitle(JFrame.EMPTY);
		frame.addTitle("An Empty Frame");
		frame.setTitle("An Empty Frame");

2 points

QUESTION 18

Which container is used to group multiple user-interface components together?

		text area
		table
		panel
		rectangle

2 points

QUESTION 19

If a text field holds an integer, what expression do you use to read its contents?

		(int) textField.getText()
		(Integer) textField.getText()
		Integer.parseInt(textField.getText())
		Int.parseInteger(textField.getText())

2 points

QUESTION 20

To build a user interface that contains multiple graphical components, the components ____.

		Must be added directly to a frame component.
		Must each be added to a separate panel.
		Must be added to a panel that is contained within a frame.
		Must be added to a frame that is contained within a panel.