Discussions

(1) you should avoid using 'static' variables and method unless you need to retain a value during a scenario reset (like for a session high score, for example); (2) lines 15 and 121 are problems in that the will be set to values prematurely; these line are set when the object of their respective classes are created and do not automatically update; remove those lines and get the values from within the act method when needed; It would be easier to check for Actor object clicks in your MyWorld act method. You could start with the following classes:

Hippo is correct about what the line should be. You should have been getting an error without the correction since you are not using a "ka0.png" image.

There should be something that has a specific value. It could be a literal constant (like '10' is) or it could be a variable (with a pre-assigned value) or it could be a method call that returns a value of the appropriate type (int, in your case) or it could be an expression that evaluates to a value of that type. At any rate, you supply the distance that you want it to move.

The is a series of problems with how you are trying to add worms into the world during game-play. First, in the wormToevoegen method, you have this: <Code Omitted>Line 2 creates a variable to hold a Worm object; then, line 3 assigns its value to itself (more of a fact than a command) -- its value remains null. Line 4 then tries to call method on a non-existent (null) worm. Let us now assume you had created a worm and assigned it t

SOLVED: The methods must be public!

Initial size plus 'a' times 10.

Exactly! Thanks so much!!

I fixed it thanks anyways

A few things to consider:

• only check collision between two object in one class -- not in both (I would put it all in the Mario class);
• only check collision immediately after each move of the actor;
• keep horizontal and vertical movement code separate (knowing which move caused a collision will tell you the orientation of the colliding actors);
• you may want to dispense with the array of enemies in your world class; I doubt very much that there is a need for it

Please give your reason for the array if you feel you need it. T

Thank you so much, I was finally able to enter the app!

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").