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JavaFX Event Handling and Property Binding

In JavaFX an event object is represented by the instance of the class javafx.event.Event

Some time ago I blogged that Java Swing should be deprecated and replaced with JavaFX. In this blog I’ll show a piece of JavaFX namely event handlers and binding. I’ve created a simple Sign In window with a GridPane layout (it’s JavaFX equivalent of Swing’s GridBagLayout). I’m not going to spend much time on the GridPane itself, but will show you a basic event handling and a binding.

In JavaFX an event object is represented by the instance of the class javafx.event.Event. There are different ways of handling events. Depending on how you structured your application you can handle events either in Java or in FXML. In this blog I’ll do everything in Java, where you can process events using one of the following techniques:

  1. Create an instance of an anonymous class overriding its handle() callback method. Pass it to the the event handler for a specific event.
  2. Use lambda expressions.
  3. Use Java method references introduced in Java 8.

The Sign In window, will have the buttons Sign In, Cancel, and the hyperlink Forgot password. Each of these controls will use different way of handling click event. The Sign In window will look as follows:

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Read the original blog entry...

More Stories By Yakov Fain

Yakov Fain is a Java Champion and a co-founder of the IT consultancy Farata Systems and the product company SuranceBay. He wrote a thousand blogs (http://yakovfain.com) and several books about software development. Yakov authored and co-authored such books as "Angular 2 Development with TypeScript", "Java 24-Hour Trainer", and "Enterprise Web Development". His Twitter tag is @yfain

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