I need help on my computer science final project

[short coral]

I have no idea why the powerup class is not drawing by my paint Component?😭

[heady parcel]

<@&987246399047479336> please have a look, thanks.

[heady parcel]

I uploaded your attachments as Gist. This makes them more accessible, for example to mobile users.

[heady parcel]

I uploaded your attachments as Gist. This makes them more accessible, for example to mobile users.

[solemn surge]

Can you please improve your question?
It's totally unclear what your problem is, i.e. what you expect to happen vs what actually happens, as well as a rough idea for where the error must be in the code, plus a short summary of what you have tried so far, so that we don't suggest you things to try that you've tried already.

[magic ravine]

Have you tried placing some breakpoints to follow your applicational flow?

[short coral]

the Power up class and the wall class is both extends from the map object class, they both are same but somehow only the wall class can be draw in the main game.

[magic ravine]

Also please remove unused code, and don't put multiple classes in the same file.

And can only be drawn is vague, do you mean it doesn't get rendered, do you get an error, etc..

[short coral]

ok, but why can't I put multiple classes in the same file?

[short coral]

it doesn't get rendered

[magic ravine]

Readability for one.

[short coral]

Is it because of the class name? Just for the record, I don't have any classes with the same name.

[serene sphinx]

its hard to help, because you havent tried pinpointing where the problem could be, yet dumped an entire project here

not everyone has the time to dive into a project like that to help with a single issue

you gotta do a bit of debugging

cut down the amount of code helpers have to look through to help solve the issue

[short coral]

Ok, the problem is the uP from the main game can't be rendered by the paintComponent method in my Mario game. However, the wall class has exactly the same code and can be rendered by my game. Why is this happening?

[serene sphinx]

if nothing is rendering for it, could be that onScreen is false

PowerUp doesnt override draw, so the implementation comes from MapObject

and the first check for that is java if(this.onScreen)

so im assuming its not rendering because onScreen is false

double check

[short coral]

I did but as I mentioned, the wall has exactly the same draw method and it works fine.

[serene sphinx]

they are difference instances

so onScreen is probably true for the wall, but not for the powerup

even though they derive from the same class, they are different objects

(this is why understanding OOP is critical)

the class defines what an object and can do. but a single class can be used to create many objects

and all those objects have their own copy of the properties defined in the class, such as onScreen

so even though both come from MapObject, they each have their own onScreen flag. for the wall, its probably true. for the powerup, may be false

never tried this in code before, but try adding this before the checkjava if(this instanceof PowerUp) { System.out.println("PU: " + this.onScreen); }

then run your code

[short coral]

it is printing true but it is still not rendered by my game.

[short coral]

it is printing true but it is not rendered by my game.

[serene sphinx]

is something being rendered over it?

sounds like it is being drawn, just not seen

its using the default implementation of MapObject. others use that same implementation

works for others, not for this. you already checked to see if onScreen is true, and it was

so the next question would be: is it being obscured by another render?

[short coral]

no it isn't

[serene sphinx]

ill try running it when i get home

nothing seems too out of place, but also didnt spend too much time digging through the code

[short coral]

thx for helping

👏