public class ListNode<T> {
    private ListNode<T> next;
    private T val;

    public ListNode(T val, ListNode<T> next){
        this.val = val;
        this.next = next;
    }

    public void setNext(ListNode<T> next){
        this.next = next;
    }

    public void setVal(T val){
        this.val = val;
    }

    public T getVal(){
        return val;
    }

    public ListNode<T> getNext(){
        return next;
    }

    public String toString(){
        return val.toString();
    }
}