spritemanager.java

一个非常好的赛车游戏代码

import java.util.*;
import javax.microedition.lcdui.*;

public class SpriteManager
{
  private Vector list;
  private int width;
  private int height;

  public SpriteManager(int width, int height)
  {
    this.width = width;
    this.height = height;
    list = new Vector();
  }

  public boolean collide(Sprite sprite)
  {
    for (int i = 0; i < list.size(); i++)
    {
      Sprite comparableSprite = (Sprite)list.elementAt(i);
      if (sprite.collide(comparableSprite))
          return true;
    }
    return false;
  }

  public Sprite collideSprite(Sprite sprite)
  {
    for (int i = 0; i < list.size(); i++)
    {
      Sprite comparableSprite = (Sprite)list.elementAt(i);
      if (sprite.collide(comparableSprite))
          return comparableSprite;
    }
    return null;
  }

  public void addSprite(Sprite sprite)
  {
    list.addElement(sprite);
  }

  public void insertSprite(Sprite sprite, int position)
  {
    list.insertElementAt(sprite, position);
  }

  public int getSpritePosition(Sprite sprite)
  {
    for (int i = 0; i < list.size(); i++)
    {
      Sprite comparableSprite = (Sprite)list.elementAt(i);
      if (sprite.equals(comparableSprite))
          return i;
    }
    return -1;
  }

  public Sprite getSprite(int index)
  {
    return (Sprite)list.elementAt(index);
  }

  public void deleteSprite(Sprite sprite)
  {
    deleteSprite(getSpritePosition(sprite));
  }

  public void deleteSprite(int position)
  {
    list.removeElementAt(position);
  }

  public int size()
  {
    return list.size();
  }

  public void paint(Graphics g)
  {
    for (int i = 0; i < list.size(); i++)
    {
      Sprite sprite = (Sprite)list.elementAt(i);
      if (((int)Float.getInteger(sprite.getX()) + sprite.getWidth() > 0) &&
          ((int)Float.getInteger(sprite.getX()) < width) &&
          ((int)Float.getInteger(sprite.getY()) + sprite.getHeight() > 0) &&
          ((int)Float.getInteger(sprite.getY()) < height))
          sprite.paint(g);
    }
  }
}