In this example, we are counting the number of elements, that are bigger than 3. We can obtain a stream from an array using the stream() method of the Arrays class: We can obtain streams in several ways from different types of data sources: Obtaining Stream From an Array In addition to the Stream interface, which is a stream of object references, there are primitive specializations like IntStream, LongStream, and DoubleStream. The package contains the interfaces and classes to support functional-style operations on streams of elements. This article is accompanied by a working code example on GitHub. In this tutorial, we will work with the different classes and interfaces of the Java Stream API and understand the usage of the various operations that we can perform on Java Streams. This capability helps us to get rid of verbose constructs like while, for, and forEach loops. The operations in a stream use internal iteration for processing the elements of a stream. Unlike collections, a Java stream is not a data structure instead it takes input from Collections, Arrays, or I/O channels (like files). The Stream API was introduced in Java 8 and is used to process collections of objects. A stream is a sequence of elements on which we can perform different kinds of sequential and parallel operations.
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