The BridgeData class

The BridgeData class varies from game to game. The first part defines all the scenes, zones and sprites. The second part has a number of service routines that deliver the information to calling methods.

There are a couple of method names that I would change for the sake of clarity, specifically:
setCurrentScene() and getCurrentScene(), which really should be called: setCurrentSceneName() and getCurrentSceneName().

// This is the class that defines all the scenes, zones and sprites
import java.util.Vector;
import java.awt.*;
import java.applet.AudioClip;
import java.net.URL;

public class BridgeData extends Object
{
    private Vector scenes;
    private Vector sprites;
    private Scene scene;
    private String currscene;
    public String startup = "waitintro";
    protected Bridge owner;
    public BridgeData(Bridge theOwner)
    {
        owner = theOwner;
        scenes = new Vector();
        sprites = new Vector();
        // Put scenes in here
        //inventory
        scene = new Scene ("inventory", "inventory.gif");
        scene.addZone(20, 20, 80, 80, "", Cursor.CROSSHAIR_CURSOR);
        scenes.addElement(scene);
        //waitintro
        scene = new Scene ("waitintro", "instr.gif");
        scene.addZone(238, 176, 164, 124, "intro", Cursor.CROSSHAIR_CURSOR);
        scenes.addElement(scene);
        //wait
        scene = new Scene ("wait", "hourglass.jpg");
        scenes.addElement(scene);
        //intro
        scene = new Scene ("intro", "china.jpg", "c12");
        scene.addZone(100, 310, 70, 60, "dock", Cursor.CROSSHAIR_CURSOR);
        scenes.addElement(scene);
        //dock
        scene = new Scene ("dock", "dock.jpg", "ara");
        scene.addZone(200, 210, 100, 70, "doornbox", Cursor.CROSSHAIR_CURSOR);
        scene.addZone(0, 0, 640, 60, "dockup", Cursor.S_RESIZE_CURSOR);
        scene.addZone(0, 0, 60, 480, "dockback", Cursor.E_RESIZE_CURSOR);
        scene.addZone(580, 0, 60, 480, "dockback", Cursor.E_RESIZE_CURSOR);
        scenes.addElement(scene);
        //dockback
        scene = new Scene ("dockback", "dockback.jpg", "ara");
        scene.addZone(0, 0, 60, 480, "dock", Cursor.E_RESIZE_CURSOR);
        scene.addZone(580, 0, 60, 480, "dock", Cursor.E_RESIZE_CURSOR);
        scene.addZone(200, 210, 100, 70, "intro", Cursor.CROSSHAIR_CURSOR);
        scenes.addElement(scene);
        //dockup
        scene = new Scene ("dockup", "dockup.jpg", "ara");
        scene.addZone(0, 430, 640, 50, "dock", Cursor.S_RESIZE_CURSOR);
        scenes.addElement(scene);
        //doornbox
        scene = new Scene ("doornbox", "doornbox.jpg");
        scene.addZone(0, 430, 640, 50, "dock", Cursor.S_RESIZE_CURSOR);
        scenes.addElement(scene);
        //Put sprites in here
        RippleA ripplea = new RippleA("ripplea", "intro");
        sprites.addElement(ripplea);
        GullA gulla = new GullA("gulla", "intro", 480, 40, 0);
        sprites.addElement(gulla);
        GullA gullb = new GullA("gullb", "intro", 370, 200, 78);
        sprites.addElement(gullb);
        GullA gullc = new GullA("gullc", "dockback", 80, 50, 12);
        sprites.addElement(gullc);
        GullA gulld = new GullA("gulld", "dockback", 150, 200, 78);
        sprites.addElement(gulld);
        // Put carryables here
        GoldKey goldkey = new GoldKey("goldkey", "dock");
        sprites.addElement(goldkey);
        Zilch dockkeyhole = new Zilch("dockkeyhole", "doornbox");
        dockkeyhole.setPosition(200, 240);
        URL addr = owner.getCurrentUrl("sounds/rooster.au");
        dockkeyhole.addAudio(0, owner.getAudioClip(addr));
        sprites.addElement(dockkeyhole);
    }
    public boolean collide(String spritename, String hitter)
    {
        if (hitter == null)
        {
            return true;
        }
        else
        {
            if (spritename.equals("dockkeyhole") && (hitter.equals("goldkey")))
            {
                Sprite found = getSpriteByName(spritename);
                if (found != null)
                {
                    AudioClip auclip = found.getAudio(0);
                    auclip.play();
                    return true;    
                }
            }
        }
        return false;
    }
            
    // Above here are game-specific functions
    // Below here are general purpose functions
    public Scene fetchScene(String a)
    {
        int ii;
        if (scenes == null)
        {
            return null;
        }
        for(ii = 0; ii < scenes.size(); ii++)
        {
            scene = (Scene)scenes.elementAt(ii);
            if (a.equals(scene.name))
            {
                return scene;
            }
        }
        return null;
    }
    public Scene fetchCurrentScene()
    {
        return (fetchScene(currscene));
    }
    public void setCurrentScene(String name)
    {
        currscene = new String(name);
    }
    public String getCurrentScene()
    {
        return(currscene);
    }
    public Vector getSceneSprites(String sceneName)
    {
        Vector local = new Vector();
        Sprite temp = null;
        for (int ii = 0; ii < sprites.size(); ii++)
        {
            temp = (Sprite)sprites.elementAt(ii);
            if (temp.scenename.equals(sceneName))
            {
                local.addElement(temp);
            }
        }
        return local;
    }
    public Vector getCurrentSprites()
    {
        return getSceneSprites(currscene);
    }
    public Vector getAllSprites()
    {
        return sprites;
    }
    public Sprite getSpriteByName(String name)
    {
        Sprite temp;
        for (int ii = 0; ii < sprites.size(); ii++)
        {
            temp = (Sprite)sprites.elementAt(ii);
            if (temp.getName().equals(name))
            {
                return(temp);
            }
        }
        return null;
    }
}