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This article mainly talks about "what are the differences between ArrayList and LinkedList". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Now let the editor take you to learn "what are the differences between ArrayList and LinkedList"?

1. ArrayList and LinkedList can be analyzed by name, one is the data structure of Array (dynamic array), the other is the data structure of Link (linked list). In addition, both of them are the implementation of List interface.

The former is an array queue, which is equivalent to a dynamic array, while the latter is a two-way linked list structure, which can also be used as a stack, queue, or double-ended queue.

2. When randomly accessing List (get and set operations), ArrayList is more efficient than LinkedList. Because LinkedList is a linear data storage method, you need to move the pointer to find it from the back to the back.

3. When adding and deleting data (add and remove operations), LinkedList is more efficient than ArrayList. Because ArrayList is an array, adding and deleting operations in it will affect the subscript index of all data after the operation point, and the data needs to be moved.

4, from the utilization efficiency point of view, ArrayList freedom is low, because it needs to manually set a fixed size of capacity, but it is more convenient to use, only need to create, and then add data, through the call subscript to use; while LinkedList has higher freedom, can dynamically change with the amount of data, but it is not easy to use.

5. The main control overhead of ArrayList lies in the need to reserve some space in the lList list, while the main control overhead of LinkList lies in the need to store node information and node pointer information.

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