如何从初始化 LinkedList 的不同类向 LinkedList 添加元素？

Question

I'm still relatively new to java programming. I know you use the dot (.) operator when using methods of specific classes, but I was wondering how to add elements to a LinkedList if I'm in a seperate class.

I initialize the LinkedList in a class.

Then in a seperate class's initializer, I get the information I need in order to add elements to that class. Now that I have that information I would like to do something such as

listname.add(objectType object); 

but I get a "cannot find symbol" error

For an amateur programmer like myself, it seems to be a scoping problem where it cannot see the LinkedList so I tried using a fully defined name

className.listname.add(objectType object); 

But this didn't work either, If anyone has a few minutes where they could help me out with this issue I would very very much appreciate it. Thank you very much in advance

Answer 1

Assume that the list is of type Object . Then, you have to do the following to add an element to the list.

Object obj=new Object();
listname.add(obj);

You have to initialize the element before adding it to the LinkedList.