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Thanks very much danpost, sorry for the late reply.

If I understand what you are looking for correctly, Hippo is correct about not needing a Cooldown class; but, my interpretation is that you just need the following in your World subclass: <Code Omitted>With this, there will be a 1 second delay before act cycle

Also: (5) infinite (or very long) loop your code that only gets triggered occasionally. Does the scenario actually stop running - that is, does the "pause" button change back to saying "run"? If it does, it's either an exception or you've got an explicit Greenfoot.stop() call (or Greenfoot bug, as danpost suggests, though I think this is very unlikely). Otherwise, it's most likely an infinite or long-running loop in your code.

I'm not sure what character that is, but it is not the correct quote. You need to use the < " > character, not < ¨ >. On a UK keyboard it is shift+2, on a US keyboard it is shift+' (the key next to "enter").

Hmm, sorry, the link doesn't appear to work. It should be: http://bugs.bluej.org/browse/GREENFOOT-803?jql=project%20%3D%20GREENFOOT%20AND%20fixVersion%20%3D%203.5.1 You will have to copy/paste.

Please show what you tried. That way we can instruct you in such as manner that you may learn from where you were going awry.

thanks

You must realize by now that all non-static methods must be executed on an object (or instance) of the class. The getScore method of the UserInfo class is executed on a UserInfo object. The getMyInfo method (a static method executed on the class itself) may return a UserInfo object that the method can be executed on. Again, you still need to check to make sure null is not returned before attempting to execute the method on what is returned.

What version of Greenfoot are you running?

Thanks :)

All recent versions of Greenfoot include the JDK and don't require a separate download. Which version of Greenfoot have you installed? And when you say you have "reinstalled Java SE download several times" what download is that exactly (is it the JDK? If you're not sure, what was the URL of the web page you downloaded it from? What version of Java was it?)

A field is a variable that is declared within a class, but outside of any code blocks. A variable declared within a code block only exists during the execution of the block. Once an execution block terminates, variables declared within the block no longer exist. Example 1:

We've now replicated such an issue and fixed the bug ready for 3.5.1. Try the following to see if it also fixes the issue for you -- open your world class editor, then go to the very end of the class, and press return a couple of times to add a blank line at the end. The bug we found seemed to relate to the lack of a newline at the end of the file confusing the editor.

Hi, (as per Greenroom discussion) the student can contact support via support@greenfoot.org - if we have their email address/username we can investigate. The most likely reason is that they are entering the wrong username when logging in. (Perhaps they are entering their email address instead of username).