How does LinkedHashMap behave in multithreaded code?

LinkedHashMap is a part of the Java Collections Framework and maintains a linked list of the entries in the map, preserving the order in which they were inserted. However, when it comes to multithreaded environments, the behavior of LinkedHashMap can be problematic.

It is not synchronized, leading to potential concurrency issues when multiple threads attempt to read and write to the map simultaneously. This can result in unexpected behavior, such as lost updates or corrupted data.

To safely use LinkedHashMap in a multithreaded scenario, it is advisable to wrap it using Collections.synchronizedMap() or utilize a ConcurrentHashMap instead, depending on your needs regarding safety and performance.