我如何使用LinkedList与另一个类的方法

Question

客户端是一个包含两个int变量的类。 我想使用我自己的方法“添加”（来自linkedList类）与defualt LinkedList“queue”，我该怎么做

public abstract class ClientQueue implements CQInterface{ 

Client c;

LinkedList<Client> queue = new LinkedList<Client>();

public void enqueue(Client c){
    linkedList linkedList = new linkedList();
    queue.linkedList.add(c);
}

class linkedList{
    // reference to the head node.
    private Node head;
    private int listCount;

    // LinkedList constructor
    public linkedList()
    {
        // this is an empty list, so the reference to the head node
        // is set to a new node with no data
        head = new Node(null);
        listCount = 0;
    }

    public void add(Object data)
    {
        Node temp = new Node(data);
        Node current = head;
        while(current.getNext() != null)
        {
            current = current.getNext();
        }
        current.setNext(temp);
        listCount++;
    }