一个小问题

java.lang.Object
  |
  +--java.util.AbstractCollection
        |
        +--java.util.AbstractList
              |
              +--java.util.AbstractSequentialList
                    |
                    +--java.util.LinkedList
java.lang.Object
  |
  +--java.util.AbstractCollection
        |
        +--java.util.AbstractList
              |
              +--java.util.ArrayList
你可以从上面的两个图中看出，linkedlist是有序的Sequential！