Parallel Stream

This lesson introduces parallel streams, which are used to process the stream elements in parallel.

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Until now, we have only been looking at serial Stream. However, Java 8 introduced the concepts of the parallel stream and parallel processing. As we have a greater number of CPU cores nowadays, due to cheap hardware costs, parallel processing can be used to perform operation faster.

Creating a parallel stream

There are two ways in which we can create a parallel Stream:

  • Using the parallelStream() method.
  • Or, if we already have a stream, we can use the parallel() method to convert it into a parallel stream.

Let us look at an example of a parallel stream.

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