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public void handle(MyEvent myEvent) {

// Logic here ...

}

And using lambda, this would be:

myClass.addEventHandler(MyEvent.MYEVENT_A, event -> {

// code here that can use event

}

See also:

• Handling JavaFX Events – 10/2013

• Event System Walk-through

JavaFX Lambda functions

With the arrival of Java 8 and the lambda function support, we now have the opportunity to

simplify many types of event handlers and other functions with lambda interfaces.

ChangeListener

The interface function is:

interface ChangeListener<T> {

void changed(ObservableValue<T> observable, T oldValue, T newValue);

}

which gives us a lambda function of:

(observable, oldValue, newValue) -> {…}

JavaFX Utilities

JavaFX provides a number of classes that don't have a visual representation but are none-the-less

vital to JavaFX operation.

JavaFX MultipleSelectionModel

This object represents what is selected within a selectable control such as a ListView or

TableView. It also defines whether or not the selection mode is single (only one thing may be

selected) or multiple (many things may be concurrently selected). The single vs multiple choice is

set by the "selectionMode" property which may have a value of either SelectionMode.SINGLE or

SelectionMode.MULTIPLE.

If there is no item selected, the returned single index is "-1".

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