davmac's response was not intended to be a trick question. He meant, of the classes it does exist in, which one were you attempting to acquire the height in.

I believe that neither of those responses are very clear. i think that he did not want a subtle answer, but he would prefer a more straight up, out in the open answer. not many people like being answered with a riddle, and i am one person who would definitely like to know the answer to this one too.

Well it's been a while since he's posted so either he figured it out or didn't come back. Think about what Davmac said: "what class does the getHeight() method exist in?" getHeight() is part of the GreenfootImage class, so we want to call the method from the class. You want the height of the image, so it's "getImage().getHeight()" Thus the code would've been

If you look in the Greenfoot API, you will find that 'getHeight()' appears in not just one, but two, different classes. Only one of those two would be appropriate for what the code is trying to do. Figuring out the class, is not just a hint, but a tell-tale sign of what is needed to make the code compile (and it would not be hard to locate them, as the Greenfoot API is not that extensive). All non-static methods work on an object of some type. If the object is not explicitly given, than the compiler will check for a 'this' (which would be either the object that is being 'act()'ed on at the moment, or one that was explicitly given in the call to that method). Keeping what I just stated in mind, and noting that 'getHeight()' is a non-static method of a specific class of object, well..

I probably should have wrote 'to make the code work as you want it to', as it would compile with 'getWorld().getHeight()' as well! @darkmist255, my post was not in response to yours; as it took a little time to put my thoughts in words and I had not seen your post until after I had posted my reply. :+)

That may be true; certainly a lot of people come to these forums and essentially ask other people to fix their code for them. However, I prefer to make them think about how to fix it theirself. In this case I wanted snow13 to understand that when you call a method that's defined in another class, you need to somehow specify which class (and perhaps which object) has the method you want to call. If snow13 had still been confused, they could have responded and asked for more help.

I do agree with you as to letting them think about what they are doing, and i think that it would normally help. thanks to another, similar forum post, i found the solution. make a new method that says the following: public int getHeight() { return getImage().getHeight(); } that lets the program know that you want the height of the image, and that is the problem with the getHeight() method. when you put it in, i doesnt know what you want to get the height of.