working with streams

The Java Stream API provides a powerful way to process collections of data using a declarative programming style. Instead of writing loops manually, you can describe what should happen to the data using operations such as filter, map, sorted, distinct, and reduce. In this section, you’ll learn how stream pipelines work and the difference between intermediate and terminal operations. You’ll also understand lazy evaluation and how streams differ from collections. Practical examples will help you write cleaner and more readable data-processing code.