The document contains code snippets demonstrating the use of sequences in JavaFX. It shows how to create and initialize sequences of different types, perform operations on sequences like accessing elements, reversing, slicing, and modifying sequences by inserting, deleting, and replacing elements. It also demonstrates using sequences in for-loops and filters.

1. Raphael Marques
Mestrando em Informática da UFPB
jose.raphael.marques@gmail.com
raphaelmarques.wordpress.com

2. 2

3. var seq1 : Integer[ ] = [1,2,3,4,5,6,7,8,9,10];
println(seq1);
//[ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ]
var seq2 = [1..10];
println(seq2);
//[ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ]
var seq3 = [1..10 step 2];
println(seq3);
//[ 1, 3, 5, 7, 9 ]
var seq4 = [10..1 step -2];
println(seq4);
//[ 10, 8, 6, 4, 2 ]
3

4. var seq1 = [1..3 step 0.5];
println(seq1);
//[ 1.0, 1.5, 2.0, 2.5, 3.0 ]
var seq2 = [1.5..3];
println(seq2);
//[ 1.5, 2.5 ]
var seq3 : (Integer[ ])[ ] = [1,2,3,4,5,6];
println(seq3);
//[ [ 1 ], [ 2 ], [ 3 ], [ 4 ], [ 5 ], [ 6 ] ]
var seq4 : (Integer[ ])[ ] = [ [1..3] , [4..6] ];
println(seg4);
//[ [ 1, 2, 3 ], [ 4, 5, 6 ] ]
4

5. var seq1 : Integer[] = 0;
println(seq1);
//[ 0 ]
var seq2 = [1..5];
println(seq2);
//[ 1, 2, 3, 4, 5 ]
seq2[0] = 0;
println(seq2);
//[ 0, 2, 3, 4, 5 ]
5

6. var seq1 = [1..5];
var seq2 = seq1;
seq2[0] = 0;
println(seq1);
//[ 1, 2, 3, 4, 5 ]
println(seq2);
//[ 0, 2, 3, 4, 5 ]
6

7. var uteis = ["seg","ter","qua","qui","sex"];
var fds = ["sab","dom"];
var semana = [uteis,fds];
var semana2 = [uteis,["sab","dom"]];
var semana3 = [uteis,"sab","dom"];
7

8. var n = [1..10];
var pares = n[i | i mod 2 == 0];
println(pares);
//[ 2, 4, 6, 8, 10 ]
println(sizeof pares);
//5
8

9. var n = [1..5]; //[ 1, 2, 3, 4, 5 ]
insert 4 into n; //[ 1, 2, 3, 4, 5, 4 ]
insert 7 before n[3]; //[ 1, 2, 3, 7, 4, 5, 4 ]
insert 8 after n[3]; //[ 1, 2, 3, 7, 8, 4, 5, 4 ]
delete 4 from n; //[ 1, 2, 3, 7, 8, 5 ]
delete n[2] from n; //[ 1, 2, 7, 8, 5 ]
delete n[2]; //[ 1, 2, 8, 5 ]
delete n; //[ ]
9

10. var n = [1..5]; //[ 1, 2, 3, 4, 5 ]
n = reverse n; //[ 5, 4, 3, 2, 1 ]
var n2 = [5..1 step -1]; //[ 5, 4, 3, 2, 1 ]
println(n == n2); //true
10

11. var n = [1..10]; //[ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ]
n[0..4] //[ 1, 2, 3, 4, 5 ]
n[0..<4] //[ 1, 2, 3, 4 ]
n[5..] //[ 6, 7, 8, 9, 10 ]
n[0..<] //[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ]
11

12. 12

13.  Tudo em JavaFX é uma expressão
 loops, condicionais, blocos
 Em alguns casos as expressões tem tipo Void.
 while, classes
 A ultima expressão de um bloco é o retorno
dele.
13

14. var x = {
var a = 5;
a * 2;
};
println(x); //10
14

15. var x = 10; var x = 10; var a : Number;
var a = 0; var a = 0;
if(x > 0){ var b = if(x > 0){ var b = a = 1;
a = 1; a = 1;
}else{ }else{ println(b);//1.0
a = 2; a = 2;
} };
println(a); //1 println(a); //1
println(b);//1
15

16. var x = 0; var x = 0;
while(x < 10){ while(x < 10)
x++; x++;
}
println(x); //10 println(x); //10
16

17. for(i in [1..5]){ var a = for(i in [1..5])
print("[{i}]"); i*i;
} println(a);
//[1][2][3][4][5] //[ 1, 4, 9, 16, 25 ]
var a = [1..5]; var b = for(i in [1,4,9,16,25])
for(i in a) Math.sqrt(i);
print("[{i}]"); println(b);
//[1][2][3][4][5] //[ 1.0, 2.0, 3.0, 4.0, 5.0 ]
17

18. 18

19. class Conta{
var nome: String;
var numero: Integer;
var saldo = 1000;
init{
}
function deposito(valor: Integer):Void{
saldo += valor;
}
override function toString(){
"Conta({nome},{numero},${saldo})";
}
}
19

20. var conta = Conta{
nome: "Raphael"
numero: 123
};
println(conta);
//Conta(Raphael,123,$1000)
20

21. class MyClass extends Conta {
}
class MyClass extends Serializable {
}
class MyClass extends Conta, Serializable {
}
21

22. mixin class Terrestre{
function andar(){ println("andando"); }
}
mixin class Aquativo{
function nadar(){ println("nadando"); }
}
class Jacare extends Terrestre, Aquativo{ }
var jacare = Jacare{};
jacare.andar();
jacare.nadar();
22

23.  default
 Visível apenas no script
 package
 Visível no mesmo pacote
 protected
 Visível no mesmo pacote ou subclasses.
 public
 Sem restrições
23

24.  public-read
 Sem restrição para leitura
 Só pode ser escrito dentro do script
 Para permissão de escrita:
▪ package public-read
▪ protected public-read
 public-init
 Pode ser inicializado na criação do objeto, em
outros casos é igual ao public-read
24

25. arquivo MyClass.fx:
public var x = 1;
public class MyClass{
public var y = 2;
}
outro arquivo:
MyClass.x = 0;
var obj = MyClass{};
obj.y = 0;
25

26. 26

27. class Donut extends CustomNode {
public var x = 0.0;
public var y = 0.0;
public var raioExterno = 10.0;
public var raioInterno = 5.0;
public var fill: Paint = Color.BLACK;
public var stroke: Paint;
...
}
27

28. class Donut extends CustomNode {
...
public override function create(): Node {
Group{
content: bind ShapeSubtract{
a: Circle{radius: raioExterno}
b: Circle{radius: raioInterno}
fill: bind fill
stroke: bind stroke
translateX: bind x
translateY: bind y
}
}
}
} 28

29. class Donut extends CustomNode {
...
public override function create(): Node {
Group{
content: bind ShapeSubtract{
a: Circle{radius: raioExterno}
b: Circle{radius: raioInterno}
fill: bind fill
stroke: bind stroke
translateX: bind x
translateY: bind y
}
}
}
} 29

30. class Donut extends CustomNode {
...
public override function create(): Node {
Group{
content: bind ShapeSubtract{
a: Circle{radius: raioExterno}
b: Circle{radius: raioInterno}
fill: bind fill
stroke: bind stroke
translateX: bind x
translateY: bind y
}
}
}
} 30

31. class Donut extends CustomNode {
...
public override function create(): Node {
Group{
content: bind ShapeSubtract{
a: Circle{radius: raioExterno}
b: Circle{radius: raioInterno}
fill: bind fill
stroke: bind stroke
translateX: bind x
translateY: bind y
}
}
}
} 31

32. class Donut extends CustomNode {
...
public override function create(): Node {
Group{
content: bind ShapeSubtract{
a: Circle{radius: raioExterno}
b: Circle{radius: raioInterno}
fill: bind fill
stroke: bind stroke
translateX: bind x
translateY: bind y
}
}
}
} 32

33. class Donut extends CustomNode {
...
public override function create(): Node {
Group{
content: bind ShapeSubtract{
a: Circle{radius: raioExterno}
b: Circle{radius: raioInterno}
fill: bind fill
stroke: bind stroke
translateX: bind x
translateY: bind y
}
}
}
} 33

34. Donut{
x: 100
y: 100
raioExterno: 80
raioInterno: 50
fill: Color.RED
stroke: Color.BLACK
}
34

35. Donut{
x: 100
y: 100
raioExterno: 80
raioInterno: 50
fill: Color.RED
stroke: Color.BLACK
}
35

36. 36

37.  Criar um projeto chamado Praticas
 Site:
 http://sites.google.com/site/joseraphaelmarques/
 Link lateral: eventos
 Baixar os 4 arquivos no pacote praticas
37

38. 38

39. 39

40. 40

41. 0 X
Y vel
angle
(x,y)
41

42. 0 X
vel+acel
Y
vel
angle
(x,y)
42

43. 0 X
vel
Y
vel-acel
angle
(x,y)
43

44. 0 X
Y vy vel
angle
(x,y) vx
44

45. 0 X
turn left
Y
turn right
(x,y)
45

46.  Criar um projeto chamado RaceFX
 Site:
 http://sites.google.com/site/joseraphaelmarques/
 Link lateral: RaceFX
 Link: Parte 1
 Baixar para o pacote racefx:
 bluecar.png
 redcar.png
 Game.fx
46

47. 47

48. public def REDCAR = Image {
url: "{__DIR__}redcar.png"
};
public def BLUECAR = Image {
url: "{__DIR__}bluecar.png"
};
def RAD180 = Math.PI;
def RAD360 = 2*Math.PI;
def ACEL = 100;
def TURN = Math.PI;
def VMIN = -50;
def VMAX = 250;
def FRICTION = 50;
48

49. public class Car extends CustomNode{
//posicao
public var x: Number;
public var y: Number;
public var angle: Number;
public var vel: Number;
public-init var image: Image;
//controles
public var left = false;
public var right = false;
public var up = false;
public var down = false;
...
}
49

50. public class Car extends CustomNode{
...
public override function create(): Node {
return ImageView {
image: image
translateX: bind x – 15
translateY: bind y - 7.5
rotate: bind -Math.toDegrees(angle);
};
}
...
}
50

51. public class Car extends CustomNode{
...
function updateTurn(factor: Number):Void{
if(left != right){//xor
var t = if(left) TURN else –TURN;
angle = (angle + t*factor) mod RAD360;
}
}
...
}
51

52. public class Car extends CustomNode{
...
function updateAcel(factor: Number):Void{
if(down){//freiando
vel = Math.max(VMIN, vel - ACEL*factor);
}else if(up){//acelerando
vel = Math.min(VMAX, vel + ACEL*factor);
}else{//desacelerando
if(vel > 0){
vel = Math.max(0, vel - FRICTION*factor);
}else{
vel = Math.min(0, vel + FRICTION*factor);
}
}
}
...
}
52

53. public class Car extends CustomNode{
...
function updateMove(factor: Number):Void{
var vx = Math.cos(angle) * vel * factor;
var vy = -Math.sin(angle) * vel * factor;
var i = x + vx;
var j = y + vy;
x = i;
y = j;
}
...
}
53

54. public class Car extends CustomNode{
...
public function update(time: Long):Void{
var factor = time / 1000.0;
if(factor == 0) return;
updateTurn(factor);
updateAcel(factor);
if(vel != 0){
updateMove(factor);
}
}
...
}
54

55. 55

56. public class Game extends CustomNode{
public-read var car1 = Car{};
public-read var car2 = Car{};
var lastTime: Long;
function update():Void{}
var timeline = Timeline {}
public function reset():Void{}
public function play(){}
var bg = Rectangle{};
init{}
public override function create():Node{}
}
56

57. public class Game extends CustomNode{
...
public override function create():Node{
Group{
content: [
bg,
car1,
car2,
]
}
}
...
}
57

58. public class Game extends CustomNode{
...
function checkKey(code: KeyCode, value: Boolean){
if(code == KeyCode.VK_LEFT){
car1.left = value;
}else if ...
}
function onKeyPressed(e:KeyEvent):Void{
checkKey(e.code, true);
}
function onKeyReleased(e:KeyEvent):Void{
checkKey(e.code, false);
}
...
}
58

59. 59

60. var game = Game{};
Stage {
title: "RaceFX"
scene: Scene {
width: 640
height: 480
content: game
}
}
60

61. 61

62. 62