Question 1 3 pts (TCOs 1, 3, and 6) Which of the following statements is false? A constructor is required to be written for every class.

The name of the constructor must be the same as the name of the class.

A constructor can be used to initialize instance variables.

A class can have multiple constructors with different parameter lists.

Question 2 3 pts (TCOs 1, 3, and 6) The data returned by JOptionPane.showInputDialog method is always _____ datatype. int

String

double

None of the above

Question 3 3 pts (TCOs 1, 3, and 6) Which statement displays a JFrame object named frame? frame.setVisible(true);

frame.setVisible();

frame.showFrame();

frame.showFrame(true);

Question 4 3 pts (TCOs 1, 3, and 6) Suppose a JFrame uses GridLayout(0,2). If you add six buttons to the frame, how many rows are displayed? 1

2

3

4

Question 5 3 pts (TCOs 1, 3, and 6) Object-oriented programming allows you to derive new classes from existing classes. This is called composition.

interfaces.

inheritance.

polymorphism.

Question 6 3 pts (TCOs 1, 3, and 6) Event handlers are implemented using the java concept of composition.

inheritance.

interfaces.

polymorphism.

Question 7 3 pts (TCOs 1, 3, and 6) The GUI library for Java that is newer and provides a uniform look and feel across platforms is Swing.

JavaFX.

AWT.

SWT.

Question 8 3 pts (TCOs 1, 3, and 6) Which method must be used to register the event handler called eHandler to a JButton component called btnNew? btnNew.setHandler(eHandler);

btnNew.addActionListener(eHandler);

eHandler.addActionListener(btnNew);

btnNew.eHandler();

Question 9 3 pts (TCOs 1, 3, and 6) Which of the following statements will display Hello World in a label named lblMessage? lblMessage.setLabel(Hello World);

lblMessage(Hello World);

lblMessage.setText(Hello World);

lblMessage.getText(Hello World

Question 10 3 pts (TCOs 1, 3, and 6) Every event object has the _____ method that can be used to identify the component that triggered the event. getSource()

getAction()

getTrigger()

getComponent()