(Node cur)
| 90 | return head.next.keys.iterator().next(); |
| 91 | } |
| 92 | private void removeNode(Node cur){ |
| 93 | Node nextNode = cur.next; |
| 94 | Node prevNode = cur.prev; |
| 95 | prevNode.next = nextNode; |
| 96 | nextNode.prev = prevNode; |
| 97 | cur.next = null; |
| 98 | cur.prev = null; |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | /** |