One way is to create an actor (with the name "HealthBar" or something), which you then add to the world in the top left. In the actor's code, you'll want the following: (I'm assuming that the Health variable is stored in the Player's class) Also, you'll need to change it from to so that it can be accessed from other classes.

"cannot find symbol - class Font" I think I have to create a variable, but what does it has to contain? Best Regards

Oh yeah, forgot to mention that: at the top of your class, add the following: (Alternatively, you could just add the following instead): and also, I forgot that in this code you need to add something: Also when I say change BLACK to whatever colour you want it to be, it must be a variable in here: http://docs.oracle.com/javase/1.4.2/docs/api/java/awt/Color.html or else you have to create a new Color object. If you want a color that isn't a variable there, tell me and I'll show you how to make a Color object.

Line 7 i had to change to: Now my source code looks like this: Now I placed the Actor anywhere on the map. Its a green foot. But it doesn´t work. If I start the game, it disappear.

First off, when I said the x, y parameters in img.drawString are the first letters x, y co-ordinates of its base, this means that you should change 200, 200 to something like 5, 195. I've changed it in the code here: Also, the reason its a green foot at first is because there's nothing in its constructor giving it a default image - something like this should work: And yeah line 7 was me being silly - I usually have the font size declared as a field in my class, with the name: So when I was on autopilot, I wrote FONT_SIZE

Ah, okay. Now I understand it and it also works fine ... Thanks a lot! But a last question I have: In the other topic "How to edit a variable of another class" you said I shall look your answer here. Ive tried to assigned to my other problem. What does the "w.getObjects" mean? Because I get the error "cannot find symbol - variable w".

You need this line above the Player p = (Player) etc line: What it does it it gets a reference on your world called w, so when you're doing what you're doing is the getObjects(class) method, which is a world method. What that does is it returns a java.util.List of all the objects of the class you entered as a parameter that are added to the world (if you enter null as a parameter, like so): then you get a List of all the objects of all classes that are added to world. Because we want just one object, we do get(0) to return the first object in that list.

Okay, thanks for your helpful answer. Ive tried to use it also here, but it doesnt work: -> "cannot find symbol - variable gameOver" Its a method in "Player", but I think I have to use something with "getWorld", no "getObject".

Let's take a second to go over your code: Firstly, what are you doing in this line of code?: (It's what's causing the error.) Because below you have this: I'm assuming you can't be trying to get a reference on a world... Quickly, I think I should go over how Greenfoot.setWorld() works: What you do for it, is the following: Let's say you have two world classes, ZombieWorld and GameOverWorld, and you're currently in ZombieWorld, and want to go to GameOverWorld. To do that, you'd use the following line of code: (Note that all the objects in ZombieWorld when you call the method will be removed) Next, (and this doesn't really matter, because it will still work the way you're doing it): Maybe you wanted something along the lines of: I only say this because it strange to call an object of the Zombie class by the name player.. Again, this works the way you're currently doing it, its just a note. Oh, and you can change: into: Hopefully my first section of answer answered your question in a way - basically, you don't need to get a reference on a world to use setWorld()! :) Also, sorry for my slow replies - I have other things I'm doing apart from sitting on the discussion boards :L I'm off for a while to watch tv now, hopefully you don't need much more assistance, or if you do, someone else can help while I'm away. Happy coding! :)

Okay, thanks a lot. Now everything works! Maybe you want to test? https://www.socialfan.de/test/game/game.html Move: w, a, s, d + mouse shoot: click left and/or right --- Edit: Maybe you have a better solution for the spawning system? If u played u know, what is bad. They are spawning always on the same position, mostly top left corner.

Back from tv, and I like the game by the way :) Would be a better method in my opinion. Also from playing the game, I've noticed that your bullets are only removed once they hit the top of the world... This means there's something like this in your Bullet.class: ...right? Well if this is the case (or something similar), it would be good to change it to this instead:

You need the number (2) in the getRandomNumber calls for this to work properly. Also the spawnX and spawnY variables do not need to be object instance variable -- just local to the method. With your timer increment inside the if where you have it, it will only get incremented when a zombie is spawned, so I moved it outside (where it should be). This is how it should look: