foodmanager.java

贪吃蛇java版本。自己写的

public class FoodManager
{
	private boolean eaten;
	private GamePanel gamePanel;
	private Snake snake;
	private Node food = null;
	
	public FoodManager(GamePanel gamePanel, Snake snake)
	{
		eaten = true;
		this.gamePanel = gamePanel;
		this.snake = snake;
		//this.food = null;
	}
	
	public void setEaten(boolean b)
	{
		eaten = b;;
	}
	
	public Node putFood()
	{
		if(eaten == true)
		{//如果食物已经被吃掉，则添加食物
			food = createFood();
			//food.display(gamePanel.getGraphics());//绘图全放在gamePanel里面
			eaten = false;
		}
		return food;
	}
	
	/*需要重新写过（不正确，死循环！）
	private boolean foodInSnakeBody(Node food)
	{
		Node p = snake.getHead().getNext();//取得蛇的尾部(队列的队头)
		
		while(p != null)
		{
			if(p.equals(food))
			{
				return true;
			}
			p = p.getNext();
		}
		return true;
	}
	*/
	
	private Node createFood()
	{
		int x;
		int y;
		Node food;
		//do
		//{
			x = (int)(Math.random() * gamePanel.getWidth() / 10 - 1);
			y = (int)(Math.random() * gamePanel.getHeight() / 10 - 1);
			food = new Node(x, y);
		//}while(foodInSnakeBody(food));
		return food;
	}
}