Which of the following code correctly registers a handler with a button btOK? a. btOK. setOnAction (e - > System. out. println ("Handle the event")); b. btOK. setOnAction ((e) - > System. out. println ("Handle the event"); ); c. btOK. setOnAction ((ActionEvent e) - > System. out. println ("Handle the event")); d. btOK. setOnAction (e - > {System. out. println ("Handle the event"); });

Question

Computers and Technology

Regan Jacobs

Yesterday, 21:16

Which of the following code correctly registers a handler with a button btOK? a. btOK. setOnAction (e - > System. out. println ("Handle the event")); b. btOK. setOnAction ((e) - > System. out. println ("Handle the event"); ); c. btOK. setOnAction ((ActionEvent e) - > System. out. println ("Handle the event")); d. btOK. setOnAction (e - > {System. out. println ("Handle the event"); });

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Answers (1)

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Davin Finley · Answer 1

The correct answer is C:

btOK. setOnAction ((ActionEvent e) - > System. out. println ("Handle the event"));

Explanation:

The button produces an action once clicked. The setOnAction method indicates what will happen when the button is clicked. Action Event is a type of event that gets processed by EventHandler, which provides the action to be performed by clicking the button (printing out "Handle the event").