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Question 216 pts

(TCO 2) In order to guarantee that only one JRadioButton is selected at any time, _____.

add each JRadioButton object to a different panel

create a ButtonGroup object and add the JRadioBttons to it

have a JCheckBox object manage the three JRadioButtons

This cannot be done in Java.

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Question 226 pts

(TCO 2) Which Java interface would you need to implement in order to handle events such as key-pressed or key-released events?

KeyListener interface

KeyStroke interface

KeyEvent interface

This information is not available in a Java program.

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Question 236 pts

(TCO 2) The Graphics class in Java provides methods to _____.

draw lines between any two points

draw test strings starting at any point

draw shapes such as rectangles, ovals, and so on.

All of the above

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Question 246 pts

(TCO 2) Which of the following Java statements gets an integer value from the user?
public class MyApp extends JFrame implements ActionListener { … }

int x = Integer.parseInt(JOptionPane.showInputDialog(“Enter an integer value”));

int x = JOptionPane.getInteger(“Enter an integer value”);

int x = Scanner.getInt(“Enter an integer value”);

int x = String.toInt(JOptionPane.showMessageDialog(“Enter an integer value”));

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Question 256 pts

(TCO 2) What range of numbers does the following expression generate?
                        Int num = 1 + (int) (Math.Random ( ) * 100);

Minimum is 0, maximum is 100

Minimum is 1, maximum is 101

Minimum is 1, maximum is 100

Minimum is 1, maximum is 101

Answer 1

21) add each JRadioButton object to a different panel
22) KeyListener interface
23) All of the above
24) int x = Integer.parseInt(JOptionPane.showInputDialog(“Enter an integer value”));
25) Minimum is 1, maximum is 100