Discussions

As mentioned by others you should avoid removing and adding objects. However I believe the slowdown happens because you create a new GreenfootImage that is quite large. Two ways you can improve this, if possible make the image smaller than 1000x100, and instead of creating a new image every time, you could store the image in an instance field and update it as needed.

For an easy start, import the Counter class. Try to follow its description and come back with questions if you have any.

I would probably control it from the world and not from the cards. If the cards should do it on their own, you can have one static field which saves the card which was clicked on first. So when you click a second card, you can decide if this card's image equals the static one and after this check, set the static card variable back to null.

Thanks for your answer, I have sent the project files to the given adress. I hope you can help me with my problem!

This line is doing nothing at all: <Code Omitted>

The problem may be a World subclass one. Show its codes.

uhm... how do I get the stored input in the variable college and call the variable in an actor? for example: //in the actor setText("College: "

I figured out how to get it to work. Thanks for the help anyway!

You already have the condition. So you can add: <Code Omitted>Then you need to have a World subclass named GameOver, put the image as the background or do whatever you want to do in that world.

You could check which image is shown right now. If it is one specific image (or even if it is playing the animation at all), check if the actor is intersecting the opponent.

If you have an actor as the parameter, then you would add this actor several times. An actor can only be in a world at one position at a time. You don't want to add one object several times, you want to add several objects of a class.

Then "inv" will stay "null" because it is never changed. Keep the HP of the Invaders in the Invaders class.

You check it just like checking loc. Just replace loc with next.