JavaFX Primer - JavaFX: Developing Rich Internet Applications - page 41

ers and definitions for this specific instance. In Listing 3.3, an object of class
Title is created with the text “JavaFX is cool” at the screen position 10, 50.
When the mouse is clicked, the provided function will be called.

Listing 3.3 Object Literal

var title = Title {
text: "JavaFX is cool"
x: 10
y: 50
onMouseClicked: function(e:MouseEvent):Void {
// do something
}
};

When declaring an object literal, the instance variables may be separated by
commas or whitespace, as well as the semi-colon.
You can also override abstract functions within the object literal declaration. The
following object literal, shown in Listing 3.4, creates an object for the java.awt
.event.ActionListener interface and overrides the abstract java method void
actionPerformed(ActionEvent e) method.

Listing 3.4 Object Literal - Override Abstract Function

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

var listener = ActionListener {
override function
actionPerformed(e: ActionEvent) : Void {
println("Action Performed!");
}
}

Va r i a b l e s

JavaFX supports two kinds of variables: instance and script . Script variables
hold state for the entire script, whereas instance variables hold state for specific
instantiations of a class declared within the script file.