stream.parallel().forEach()

This code is using the Java Stream API to perform a parallel operation on a collection of elements. The forEach() method is being called on the parallel stream to perform an action on each element in the stream.

The parallel() method is used to convert the sequential stream into a parallel stream, which allows multiple elements to be processed simultaneously by different threads.

Overall, this code is leveraging the benefits of parallel processing to improve the performance of the operation on the stream. However, it's important to note that parallel processing may not always be faster than sequential processing, and it can also introduce new challenges related to thread safety and synchronization.