Terminal operations

Terminal operations act as the trigger point in a pipelined stream operation to trigger execution. Terminal operations either return a void or a non-stream type object and once the pipelined operations have been executed on the stream, the stream becomes redundant. A Terminal operation is always required for a pipelined stream operation to be executed.

Stream operations can further be classified as short-circuiting operations. An intermediate operation is said to be short circuited when an infinite input produces a finite stream such as in the case of the limit() method. Similarly, short circuiting operations in the case of terminal operations is when an infinite input may terminate in finite time, as is the case for the methods anyMatch(), findAny(), and so on.

Streams also support parallelism , but in the case of stateful operations, since each parallel operation can have its own state, a parallel stateful operation may have to undergo multiple passes to complete the...