ABSTRACT
This chapter explains Java streams in which the users covered how to create streams and how to processing data with streams and how to use collectors in Java. A stream pipeline comprises three parts: a source, intermediate operations, and terminal operation. Because intermediate operations yield a new modified stream, several intermediate operations can be chained together. Sayable is a functional interface in the following example, with default and an abstract method. The term “default method” refers to a method that has a default implementation. Collectors are a subclass of the Object class. It supports reduction operations such as grouping components into collections, summarizing elements based on various criteria, and so on.
