Discussions

First, make it a complete statement. Then, write the assignment part of it as your second line and determine from that what the initialization (or declaration) part of it should be for the first line.

I am confused in general how the program knows that the keys are set from left to right in the first place. Where in the code would you see this? I bolded the key words, no pun intended.

This line does not make any sense in your code: <Code Omitted>The strip is not something that is part of the game play itself and having something intersect it is meaningless. It is more like a control or information object. In other words, it does not interact with other objects in the world; only with the user. Besides that, later in the method, you are referring to that object as 'lives', not 'strip' (either will do, but be consistent). To get a reference to the 'strip', use the following:

You could replace lines 110 through 173 with: <Code Omitted>

What's he's saying is to put the hasIntroPlayed outside of the method. The sound keeps looping because you made a variable inside a method, that turns back to false every time the method is called (which is every frame). If you have the variable outside the method, it will be available to all your code inside the class, and won't ever change unless you tell it to.

Yeah that looks like what I'm looking for. Thanks henrYoda :) Also though, what's the most effective way of creating a random selection of questions without having long and strenuous code?

ok

<Code Omitted>

You could also cache the images by declaring them static, that way they all share the same image: private static GreenfootImage image1 = new GreenfootImage("space.jpg");

If all changes in the score are multiples of ten, then you could change the 'act' method to the following: <Code Omitted>

Thank you very much. Would you happen to know how to play a sound file when the game ends or include pop ups in the game?

Well a I already know abstracts work, LightActor and UseableActor are abstract. I wished interfaces would work. I don't want an empty abstract class that any HUD items need to extend, especially since a couple of the HUD implemented classes extend other objects...

A Grenade actor would need several things, a time limit to detonation, a blast radius, and affecting specific actors around it are the three biggest things that come to my mind. A detonation is easy if you know how to create counters that count down or up to the time. The blast radius and affecting other actors is a little bit harder. You need to use getObjectsInRange() to find actors around the grenade, and then affect them accordingly. Here's an example of how to use getObjectsInRange():

Sry i have only my ipad now and not the computer, but i have no error. I removed the && reload.getWorld() == null in your code and now it works, and at this time i cant see any laggs. Thank you