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What is the use of ActionEvent class?

What is the use of ActionEvent class?

Class ActionEvent. A semantic event which indicates that a component-defined action occurred. This high-level event is generated by a component (such as a Button ) when the component-specific action occurs (such as being pressed).

What is ActionEvent?

What is an ActionEvent? – An action event is a semantic event which indicates that a component-defined action occurred. – The ActionListener interface gets this ActionEvent when the event occurs. – Event like Button pressed is an action event.

What is the purpose of JUnit testing?

Why do we use JUnit testing? JUnit testing is used to test the behavior of methods inside classes we have written. We test a method for the expected results and sometimes exception-throwing cases—whether the method is able to handle the exceptions in the way we want.

What ActionEvent method is called to determine which component fires the event?

The listener uses the getActionCommand method to determine which radio button fired the event. Shows how to listen for action events on menu items. An applet that registers an action listener on a text field.

What is ActionEvent Javafx?

public class ActionEvent extends Event. An Event representing some type of action. This event type is widely used to represent a variety of things, such as when a Button has been fired, when a KeyFrame has finished, and other such usages.

What does source mean in Java?

Description. object getSource() Returns the object on which the event occurred. You can use the getSource method to determine which component sourced the event when the listener is registered as an event listener with more than one component.

What is actionPerformed in Java?

The method actionPerformed handles all the actions of a component, and inside this method, you will define or write your own codes that will be executed when an action occurred. Here’s an example on how to implement ActionListener in Java.