net.stemkoski.bagel

Class Group

java.lang.Object

net.stemkoski.bagel.Entity

net.stemkoski.bagel.Group

public class Group
extends Entity

A collections of Entity objects.

Field Summary

Fields

Modifier and Type	Field and Description
int	count The number of Entity objects currently in this list.
private java.util.ArrayList<Entity>	list The collection underlying this list.

Fields inherited from class net.stemkoski.bagel.Entity

container

Constructor Summary

Constructors

Constructor and Description
Group() Initialize this object.

Method Summary

Modifier and Type	Method and Description
(package private) void	act(double deltaTime) Runs act method of all objects in this collection.
void	addEntity(Entity e) Add an Entity to this collection.
(package private) void	draw(javafx.scene.canvas.GraphicsContext context) Render all Entity objects in this collection to a canvas.
Entity	get(int index) Retrieve a single Entity instance from this collection.
java.util.ArrayList<Entity>	list() Retrieve a (shallow) copy of this list.
void	removeEntity(Entity e) Remove an Entity from this collection.

Methods inherited from class net.stemkoski.bagel.Entity

remove

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

list

private java.util.ArrayList<Entity> list

The collection underlying this list.

count

public int count

The number of Entity objects currently in this list.

Constructor Detail

Group

public Group()

Initialize this object.

Method Detail

addEntity

public void addEntity(Entity e)

Add an Entity to this collection.

Parameters:

e - The Entity being added to this collection.

removeEntity

public void removeEntity(Entity e)

Remove an Entity from this collection.

Parameters:

e - The Entity being removed from this collection.

list

public java.util.ArrayList<Entity> list()

Retrieve a (shallow) copy of this list. Especially useful in for loops. Avoids concurrent modification exceptions when adding/removing from this collection during iteration.

Returns:

a copy of the list underlying this collection

get

public Entity get(int index)

Retrieve a single Entity instance from this collection.

Parameters:

index - The index of the entity in this collection.

Returns:

a single Entity instance from this collection.

draw

void draw(javafx.scene.canvas.GraphicsContext context)

Render all Entity objects in this collection to a canvas.

Overrides:

draw in class Entity

Parameters:

context - GraphicsContext object that handles drawing to the canvas

act

void act(double deltaTime)

Runs act method of all objects in this collection.

Overrides:

act in class Entity

Parameters:

deltaTime - amount of time that has passed since the last iteration of the game loop