Chapter 7: 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 executed?

Short Answer

Expert verified

Answer: A class must implement the ActionListener interface to be an event listener for JButton components. The required method, public void actionPerformed(ActionEvent e), is executed when the user clicks the JButton and triggers an action event.

Step by step solution

Interface to Implement for Event Listener

The class must implement the ActionListener interface to serve as an event listener for a JButton component.

Required Method in the Class

The class must have the following method: public void actionPerformed(ActionEvent e)

Execution Time for the Method

This method is executed when the user clicks the JButton, triggering an action event.

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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 executed?

Short Answer

Step by step solution

Interface to Implement for Event Listener

Required Method in the Class

Execution Time for the Method

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