Consider the following code snippet:
Public class ClickListener implements ActionListener
{
Public void actionPerformed(ActionEvent event)
{
System.out.println("I was clicked.");
}
}
Public class ButtonTester
{
Public static void main(String[] args)
{
JFrame frame = new JFrame();
JButton button = new JButton("Click me!");
Frame.add(button);
ActionListener listener = new ClickListener();
Button.addActionListener(listener);
)..
}
}
Which of the following statements is correct?
A) Class ButtonTester is an interface type.
B) A ClickListener object listens for the action events that buttons generate.
C) Class ClickListener is an interface type.
D) Class ButtonTester implements an interface type.

Question

Quizplus · Accepted Answer

The ClickListener class implements the ActionListener interface, which means it can listen for action events generated by components such as buttons. The ButtonTester class simply creates a JFrame and a JButton, adds the button to the frame, creates a ClickListener object, and adds the listener to the button so that it will respond to clicks. None of the other choices are correct.

Consider the Following Code Snippet