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Chapter 12: Problem 7

If you are writing an event listener class for a JButton component, what interface must the class implement? What method must the class have? When is this method execured?

Short Answer

Expert verified
When is this method executed? Answer: The event listener class for a JButton component must implement the ActionListener interface. The required method for the ActionListener class is `public void actionPerformed(ActionEvent e)`. This method is executed when the user interacts with the JButton component, such as clicking on the button.

Step by step solution

01

Interface for Event Listener Class for a JButton Component

The class should implement the ActionListener interface.
02

Required Method for the ActionListener Class

The class must have the `public void actionPerformed(ActionEvent e)` method.
03

When is actionPerformed() Method Executed?

The `actionPerformed()` method is executed when the user interacts with the JButton component, such as clicking on the button.

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