Shulou(Shulou.com)06/02 Report--

What is LinkedHashMap? in view of this question, this article introduces in detail the corresponding analysis and answers, hoping to help more partners who want to solve this problem to find a more simple and feasible way.

LinkedHashMap Overview:

LinkedHashMap is a hash table and link list implementation of the Map interface with a predictable iteration sequence.

This implementation provides all optional mapping operations and allows the use of null values and null keys.

This class does not guarantee the order of the mapping, especially it does not guarantee that the order is permanent.

The difference between LinkedHashMap implementation and HashMap is that

The latter maintains a doubly linked list that runs on all entries.

This link list defines the iteration order, which can be the insertion order or the access order.

Note that this implementation is not synchronous. (not thread safe)

If multiple threads simultaneously access the hash mapping of a link

And at least one of the threads structurally modified the mapping.

It must remain externally synchronized.

This is the end of the answer to the question about what LinkedHashMap is. I hope the above content can be of some help to you. If you still have a lot of doubts to solve, you can follow the industry information channel to learn more about it.

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