Discussions

You need to be a bit more specific. Where is your counter? How is it declared? Are you trying to get the score TO the scoreboard? Usually, the score is kept within the scoreboard class, and a reference to the scoreboard is kept in the world class. That way, methods such as getScore(), bumpCounter(int), and other counter related methods can be placed there and the act method will update the scoreboard image (if the score is in view the whole game-set).

You're probably running the JRE rather than the JDK - the former won't work. Head over here and grab the latest JDK - make sure to click on the button under JDK not JRE!

I'd advise against running Greenfoot as administrator; you simply don't need to. If you get the warning about the scenario being read-only when you don't actually have a scenario open, there's nothing to worry about, you can ignore the warning. If you do have a scenario open (one of the examples included with Greenfoot) it just means you need to save the scenario somewhere else (and then open it from the new location) before you can work with it.

The reason the explode object does not remove is because you are removing 'this' from the world first. Now there is no 'world' referenced. Switch the last two lines of code and the explode should remove. As far as fraction of objects, the only ways I can think of are (1) if you build the object in parts, or (2) if you change the image to reflect the remo val at given points.

We'd need to see your code for certain - but the above advice is a common cause! If you have declared a populate() method then check it's the same case (Java is case sensitive) and check your curly brackets are all in the right place which can also sometimes cause that error.

Also check out the Greenfoot videos (especially the ones on shooting).

Thanks to all, now it works fine ... and i understand it :D

Thanks so much davmac. You've really helped here!

awesome, thanks buddy. i was watching a tutorial on this topic (platform games) and had the same code, which in the tutorial, the code compiled with no errors. very strange! anyways, thanks!

By the way a replacement for: <Code Omitted>is:

needed rotation of the path so I modified last 2 lines, and it works.. Tnx!

I found that the problem is that we are calling GamePad.getNumGamePads() in the constructor of the world. Moving that call fixed our issues. I might go wake my son up to tell him the good news. He went to bed a bit sad earlier. :)

Yup, to run Greenfoot you'll need the JDK which you can download from here.

Actually, if you chain the method calls (as you do here) there is no need to import the List interface. You only need to import List if you refer to it directly, eg declare a variable of type List.