what's new for javafx in jdk8 - weaver

New JavaFX Features in Java 8(and an intro to Lambdas)

James WeaverJava Technology AmbassadorOracle Corporation

@[email protected]

Copyright © 2012, Oracle and/or its affiliates. All rights reserved.2Copyright © 2012, Oracle and/or its affiliates. All rights reserved.

ProgramAgenda

Introduction to JavaFX– Creating a user interface

– Understanding Scene Builder and FXML

New JavaFX Features in JDK 8– Some new Java features in JDK 8

– New JavaFX Features in JDK 8

Copyright © 2012, Oracle and/or its affiliates. All rights reserved.3

About the presenterAuthor of several Java/JavaFX books


About the presenterCo-leader of IoT & JavaFX communities at java.net

javafxcommunity.com

iotcommunity.net


About the presenterFavorite TV shows are music competitions like “The Voice”


About the presenterI see that Italy has “The Voice” as well …


About the presenter… with a singing Nun. Very cool!


Java 8 Launch Event & Resource Videos

oracle.com/java8


IoT Developer Challenge

Show the world what you can do with Java + IoT for a chance to win a trip to JavaOne for you and two team members.

oracle.com/java8

Key Dates:Submissions begin March 3rd, 2014Submission deadline is May 30th, 2014Winners announced June 30th, 2014JavaOne 2014 from Sept. 28 to Oct. 2, 2014

http://www.oracle.com/javaone


■ An API included in Java SE 7/8 for UI development

■ The successor to Java Swing

■ Not the JavaFX Script language

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JavaFX is:


Creating a User Interface


New JavaFX Application Dialog


Extend javafx.application.Application


Override the Application start() Method


Create the Circle


Create the Buttons and Handle Events


Layout the Buttons in an HBox


Create and Populate the Scene


Animate the Circle


Bind UI Properties to Animation Status


Setup and Show the Stage


Using Scene Builder and FXML


Scene Builder is a...

■ UI layout tool for JavaFX

■ Visual Editor for FXML


FXML is...

■ an XML-based language that expresses the UI

■ designed to be toolable


Download Scene Builderhttp://www.oracle.com/technetwork/java/javase/downloads

http://www.oracle.com/technetwork/java/javase/downloads


Scene Builder 2.0 Preview Available


Some New Java Features in JDK 8

■ Nashorn JavaScript Engine

■ Date & Time API (JSR-310)

■ Bulk data operations for collections

■ Lambda expressions and virtual extension methods

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Compact ProfilesApproximate static footprint goals

Compact1 Profile

Compact2 Profile

Compact3 Profile

Full JRE 54Mb

30Mb

16Mb

11Mb


Java SE Embedded

Optimised binary for embedded use from devices to gateways Latest Java innovations in the smallest footprint Use of compact profiles

– Approximate JRE size 20.4Mb (ARM v7 VFS, Hard Float) Compact profile 1: 10.4Mb JavaFX: 10Mb

Production ready binary for popular platforms that run Linux– ARM v6/7 with Hard floating point

– Raspberry Pi is one of the reference platforms


A Lambda Expression (Closure) is…

…a function that that may have parameters, an expression or block of code, optionally returning a value.

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e -> anim.playFromStart()

Copyright © 2012, Oracle and/or its affiliates. All rights reserved.31 31

Event Handling w/Anon Inner Classes

Any interface that has exactly one abstract method is known as a functional interface, and may be replaced by a lambda expression.


Replace with Lambda Expression

The type of the lambda is inferred by the compiler as EventHandler<ActionEvent> because the onAction() method takes an object of type EventHandler<ActionEvent>.

Because EventHandler has a single method handle() the lambda expression must be an implementation of the handle() method.


Simplify the Lambda Expression

The parameter in this lambda expression must be an ActionEvent, because that is the type specified by the handle() method of the EventHandler interface.

We can therefore simplify this lambda expression because the parameter type is inferred.


Lose the Parentheses

When a lambda expression has a single parameter and its type is inferred, the parentheses are not required


Lose the Braces

Because the block of code in our lambda expression contains only one statement, we can lose the braces.


Copyright © 2012, Oracle and/or its affiliates. All rights reserved.

void createUI() { Button button = new Button("Guess What I'm Thinking"); button.setOnAction(e -> guess(e)); // lambda only calls a method...}

void guess(ActionEvent event) { Button button = (Button) event.getSource(); button.setText("You love Lambda!");}

If a lambda only calls a method …



… you can use a method reference

void createUI() { Button button = new Button("Guess What I'm Thinking"); button.setOnAction(this::guess); // use method reference ...}

void guess(ActionEvent event) { Button button = (Button) event.getSource(); button.setText("You love Lambda!");}



Four Kinds of Method References

1) Reference to a static method:ContainingClass::staticMethodName

2) Reference to an instance method of a particular object:ContainingObject::instanceMethodName

3) Reference to an instance method of an arbitrary object of a particular type: ContainingType::methodName

4) Reference to a constructor:ClassName::new



Another Method Reference Example

FileFilter x = f -> f.canRead(); // lambda only calls a method

FileFilter x = File::canRead(); // use method reference


JavaFXpert.com blog post with more detail

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Nashorn is a replacement for Rhino. Its a bazilliontimes faster than Rhino. And it has some reallycool features, such as direct support for JavaFX.

Project Nashorn



Nashorn

var Rectangle = Java.type("javafx.scene.shape.Rectangle");var Color = Java.type("javafx.scene.paint.Color");var StackPane = Java.type("javafx.scene.layout.StackPane");var Scene = Java.type("javafx.scene.Scene");var RotateTransition = Java.type("javafx.animation.RotateTransition");var Duration = Java.type("javafx.util.Duration");



Nashornvar rect = new Rectangle();rect.width = 200;rect.height = 200;rect.stroke = Color.WHITE;rect.strokeWidth = 5;rect.fill = Color.ORANGE;rect.arcWidth = 20;rect.arcHeight = 20;var stack = new StackPane(rect);$STAGE.scene = new Scene(stack, 320, 240, Color.BLACK);

var tx = new RotateTransition(Duration.seconds(5), rect);tx.toAngle = 360;tx.autoReverse = true;tx.cycleCount = RotateTransition.INDEFINITE;tx.play();



Nashorn: Launching JavaFX

$JDK_HOME/bin/jjs -fx hello.js



Nashorn FX


New JavaFX Features in JDK 8■ New Modern Theme: Modena

■ Enhancements to Collections, Binding, Tasks and Services

■ Full screen improvements, new unified stage style, Swing integration improvements, rich text, and printing

■ DatePicker and TreeTableView

■ Public API for CSS structure

■ WebView Enhancements

■ JavaFX 3D, Multi-touch (in 7 but relevant to 3D)

■ Embedded Support

46


JavaFX 8New Theme

47

Caspian

vs

Modena



Modena


JavaFX 8

Customisable– Configurable key combinations to exit full screen mode

– Ability to prevent user exiting full screen mode

Improvements To Full Screen Mode

// Set the key combination that the user can use to exitstage.setFullScreenExitKeyCombination(KeyCombination.NO_MATCH);

// Setup the click handler so we can escape from full screenRectangle r = new Rectangle(0, 0, 250, 250);r.setOnMouseClicked(e -> stage.setFullScreen(false));

// Set full screen againstage.setFullScreen(true);


JavaFX 8

New API for printing– Currently only supported on desktop

Any node can be printed

Printing Support

PrinterJob job = PrinterJob.createPrinterJob(printer);job.getJobSettings().setPageLayout(pageLayout);job.getJobSettings().setPrintQuality(PrintQuality.HIGH);job.getJobSettings().setPaperSource(PaperSource.MANUAL);job.getJobSettings().setCollation(Collation.COLLATED);

if (job.printPage(someRichText)) job.endJob();


JavaFX 8

DatePicker TreeTableView

New Controls



The JavaFX DatePicker is designed with the newCalendaring APIs in Java 8 using java.time

DatePicker


DatePicker



DatePicker

import java.time.LocalDate; // From new Date/Time API... LocalDate ld; DatePicker dp = new DatePicker(); dp.setOnAction(e -> { ld = dp.getValue(); System.out.println("Date selected " + ld); });



Date Picker


TreeTableViewUI control with combined TreeView and TableView controls functionality

57


JavaFX 8

Gestures– Swipe

– Scroll

– Rotate

– Zoom

Touch events and touch points

Touch Support


Touch Gestures


The Swipe Gesture

Commonly a finger drag in one direction A single event is produced for the gesture May be left, right, up, or down


Handling the Swipe Gesture (SwipeEvent)

Note: Lambda expressions from JDK 8 are used here to simplify event handling


Handling the Swipe Gesture (SwipeEvent)


The Scroll Gesture

User turns mouse wheel, drags finger on touch screen, etc.

Scroll events are continuously generated, containing x/y position-related info

Events are pixel-based or character/line-based

If inertia is supported, scroll events may be generated after user quits scrolling


Handling the Scroll Gesture (ScrollEvent)


The Rotate Gesture

User typically drags two fingers around each other

Rotate events are continuously generated, containing angle-related info


Handling the Rotate Gesture (RotateEvent)


The Zoom Gesture

User typically drags two fingers apart or closer together

Zoom events are continuously generated, containing zoom factor-related info


Handling the Zoom Gesture (ZoomEvent)


Handling Touch (TouchEvent/TouchPoint)

A TouchEvent contains information about a touch, including:

– Event type: Pressed, released, moved, or stationary

– Touch points: The TouchPoint instances that represent each of the points that were touched

Each TouchEvent has a unique ID to identify the events and touch points in a multi-touch action


Responding to Touch Events


JavaFX 8

Predefined shapes– Box

– Cylinder

– Sphere

User-defined shapes– TriangleMesh, MeshView

PhongMaterial Lighting Cameras

3D Support


Creating Primitive Shapes and Materials


Placing a Texture on a Sphere

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Placing a Texture on a Sphere

74


3D Lights

■ Lights are nodes in the scene graph

■ PointLight

■ AmbientLight

■ Default light provided if no active lights

75


Lights, Camera, Action!


Example 3D multi-touch app: ZenGuitar3D


Questions?


Please note

The preceding is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, and timing of any features or functionality described for Oracle’s products remains at the sole discretion of Oracle.

New JavaFX Features in Java 8(and an intro to Lambdas)

James WeaverJava Technology AmbassadorOracle Corporation

@[email protected]

what's new for javafx in jdk8 - weaver

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