The Stream API is used to process a group of objects. A stream is a series of objects which supports different methods that can be pipelined to produce the expected result.

The features of the stream are –
  • A stream takes the input from the Collections, an Arrays or the I/O channels.
  • Streams don’t alter the original data structure; they only give the result according to the pipelined methods.
  • Each intermediate operation is executed in a lazy manner, and as a result, it returns a stream. Hence various intermediate processes can be pipelined. The terminal operations remain at the end of the pipelining process. It replaces the final value, and the pipeline is terminated.

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