[coco]

Gox is right:

Code:

public Deck split(int n) {
        //implement
        LinkedList<Card> linkedlist= new LinkedList<Card>();
        LinkedList<Card> linkedlist2= new LinkedList<Card>();
        
        int i = n;
        
        while (i > 0){
        linkedlist2.add(linkedlist.get(0));
        linkedlist.remove(0);
        
        i--;
}

You could also change it to

Code:

linkedlist2.add(linkedlist.poll());

There are a whole bunch of different ways to do it so I suggest looking at the API