Todo mundo já jogou 2048. E muita gente sabe programar em Java. Nesta palestra veremos como a versão JavaFX do jogo 2048 foi criada, usando animações da plataforma, estilos CSS, e inclusive os novos recursos da linguagem apresentados no Java 8, como Lambda expressions.

1. Como Criar o Game 2048
Com JavaFX e Java SE 8
Bruno Borges
Principal Product Manager
Java Evangelist

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• Java Evangelist
• Orale Product Manager
• Entusiasta JavaFX e IoT
• Onde me encontrar
• @brunoborges
• plus.google.com/+BrunoBorges
Bruno Borges

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Agenda
• Jogo 2048
• Da idéia à execução, da execução ao Raspberry Pi
• Java para game developers
• Java SE 8: Lambda expressions, Stream API
• JavaFX 8: Conceitos, CSS, Animações, 3D API
• Outros Exemplos

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• Mova os números em uma matriz
de 4x4
• Quando números iguais se
encontram valores são somados
• Vence quando atingir 2048
• 2, 4, 8, 16, 32, 64, 128, 256, 512,
1024, 2048
O jogo
2048

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Onde jogar 2048?
• iOS
• Android
• Web (Javascript)
• gabrielecirulli.github.io/2048/
• JavaFX
• PCs, Laptops, Tablets e Smartphones (que suportam Oracle Java SE 8),
Raspberry Pi e similares
Em quase todos os lugares!

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• Classes de estrutura
• Tile, Location, Direction
• GameManager
• Animações
• Eventos
• Estilos CSS
2048FX
Criando o jogo em JavaFX

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Java Classes
Just a few
Direction, Location
Tile
GameManager
SessionManager
Game2048

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Grid para o 2048
y(i)
x(j)
Criando um grid com Lambda Expressions

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Direction e Location
Estruturas básicas
X Y
UP 0 -1
RIGHT 1 0
DOWN 0 1
LEFT -1 0

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Tile
Representa um “quadrado” no jogo, com valor atribuído
Novo tile aleatório.
90% chance para número “2”.

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Eventos de Teclado
Ouvindo eventos em JavaFX para movimentar os Tiles
Salva estado atual
Recupera último estado
Ignora teclas que não sejam setas “arrows”
Mapeia setas a Directions, chama GameManager

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Eventos de Touchscreen
Ações mapeadas usando Lambda Expressions do Java 8
* Swipe images from quojs.tapquo.com

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Animações
Movendo os Tiles de um lado para o outro

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Como saber se o jogo acabou?
On Finish

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Mostrar fim do jogo
gameOverProperty.set(true); ... Try again?

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Java para Game
Developers

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Java SE 8

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Lambda Expressions
Listeners
Com Java SE 8
Com Java SE 7

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Lambda Expressions e Stream API
Exemplo
Com Java SE 8
Com Java SE 7

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Lambda Expression como Parâmetro
Método que recebe uma expressão Lambda

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Parallel Stream
Encontrar Locations disponíveis no grid, usando multi-thread

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JavaFX 8

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Arquitetura do JavaFX
• Prism – renderização nativa
• OpenGL (Mac, Linux, Embedded)
• Direct 3D (9 em Windows XP/Vista, 11 em Windows 7)
• Java 2D (software rendering)
• Scene Graph
• Nodes
• States
• Effects

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JavaFX 3D

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Criando Formas e Materiais Primitivos

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Colocando Textura em uma Esfera
27

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Colocando Textura em uma Esfera
28

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Colocando Textura em uma Esfera
29

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Para saber mais
 Documentação do Java 8:
 bit.ly/java8docs
 Código-fonte do jogo 2048FX
 github.com/brunoborges/fx2048
 Twitter: @brunoborges

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ORACLE e V.OFFICE
Parceria WDP (Workforce Development Program)
A Oracle University tem o prazer de anunciar a V.OFFICE
Treinamentos como nosso mais novo parceiro WDP.
A Oracle Corporation lançou o WDP para resolver o déficit global e
contínuo de trabalhadores na área de TI e a necessidade de
treinamento acessível e de baixo custo nas habilidades
correspondentes. O WDP permite que as instituições educacionais
participantes forneçam treinamento em Oracle em tempo integral e
meio-período a alunos em suas comunidades locais.

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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.

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