Example
Buttons fire action events when they are activated (e.g. clicked, a keybinding for the button is pressed, ...).
button.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent event) {
System.out.println("Hello World!");
}
});
If you are using Java 8+, you can use lambdas for action listeners.
button.setOnAction((ActionEvent a) -> System.out.println("Hello, World!"));
// or
button.setOnAction(a -> System.out.println("Hello, World!"));
