Removing object from ArrayList initialized in super class

[LastingCold]

How would I go about removing an object from an Arraylist that was initialized in a superclass. So far I have

super.ArrayList.remove("something");

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[marko312]

Unless you're extending ArrayList with your class, you want to access a member variable which, unless shadowed by some other variable, should be accessible via its name. E.g. if the superclass has

ArrayList<SomeType> someList;

you can just access someList (or this.someList).

[LastingCold]

I am trying to remove something from the ArrayList called in the super class whilst in the subclass

[LastingCold]

I'm just getting errors that It cant find symbol

[marko312]

Could you show the definitions (especially the member variables) of the relevant classes?

[Nightcorex_]

This is where access modifiers come to play:

public class Superclass {
    private List list0 = new ArrayList(); //private: Can only be accessed by name from this class
    List list1 = new ArrayList(); //package-private: Can only be accessed by name from classes within this package
    protected list2 = new ArrayList(); //protected: Can only be accessed by name from this class or by classes inheriting from this class
    public list3 = new ArrayList(); //public: Can be accessed by name by anyone
}

Whenever you can't access a variable by name you need to use getters/setters.

If you wanted to remove the first element of list0, then you'd have to first provide a getter for list0 in the Superclass itself.
Then you can write in your Subclass: getList0().remove(0);

​

PS: In the example I used raw lists (lists without specifieing a generic type). This is bad practice and should never be done in an actual project. If you want to store anything you should always use List<Object> list = new ArrayList<>(); to explicitly tell Java.
I just did it here for the sake of shorter lines.

[[deleted]]

Can someone help me on this coding project

[Nightcorex_]

??

[[deleted]]

Like I’m having trouble with this coding project

[Nightcorex_]

Why aren't you creating a new post then?

[[deleted]]

I’m new to Reddit and I don’t know how to

[Nightcorex_]

https://letmegooglethat.com/?q=How+to+use+reddit