nick polich is a weenie

Test.java

public class Test{
    private static class Node<E extends Comparable<E>>{
        E data;
        Node<E> next;

        public Node(E data){
            this.data = data;
            this.next = null;
        }
    }

    public static boolean find(int a, Node<Integer> x){
        Node<Integer> t = x;
        while(t != null){
            if(t.data.compareTo(a) == 0)
                return true;
            t = t.next;
        }
        return false;
    }

    public static boolean nonDuplicates(Node<Integer> x){
        Node<Integer> dup = new Node<>(x.data);
        Node<Integer> dupt = dup;
        Node<Integer> t = x.next;
        while(t != null){
            if(find(t.data, dup)){
                return true;
            }
            dupt.next = new Node<>(t.data);
            t = t.next;
            dupt = dupt.next;
        }
        return false;
    }

    public static void main(String[] args){
        Node<Integer> x = new Node<Integer>(1);
        x.next = new Node<>(2);
        x.next.next = new Node<>(3);
        x.next.next.next = new Node<>(5);
        x.next.next.next.next = new Node<>(9);
        
        Node<Integer> y = new Node<>(9);
        y.next = new Node<>(2);
        y.next.next = new Node<>(3);
        y.next.next.next = new Node<>(1);
        y.next.next.next.next = new Node<>(9);
      
        System.out.println(nonDuplicates(x));
        System.out.println(nonDuplicates(y));
    }
}