Why is my doubly linked list not adding elements to the list

Question

I am supposed to write a code that pushed nodes to the doubly linked stack, except I have to have the first added element (top) at the end of the stack, meaning the last added element should be the first one in the doubly linked list.

Here's my code for the push method

public void push(T dataItem) {
    
    DoubleLinkedNode<T> newNode = new DoubleLinkedNode<T>(dataItem);
    
    if(top == null) {
        
        top = newNode;
        
    }
    
    else {
         
        DoubleLinkedNode<T> currentNode = top;
        
        while (currentNode.getPrevious() != null){
            
            currentNode = currentNode.getPrevious();
            
        }
        
        newNode.setNext(currentNode);
        currentNode.setPrevious(newNode);
        
    }
    
    numItems++;
    
}