Скачать или смотреть CodeWithMe | Java 8 Stream API: Grouping and Aggregating Data with Collectors

In this video, we will learn how to use the Java 8 Stream API to group and aggregate data with Collectors. We'll start by reviewing the basics of the Stream API, and then we'll dive into the Collectors class, which provides a variety of useful methods for grouping and summarizing data.

We'll walk through an example scenario where we have a list of employees, and we want to calculate the total salary for each department. We'll see how to use the #groupingBy method to group the employees by department, and then we'll use the summingDouble method to calculate the total salary for each group.

We'll then implement this scenario in code, using a Map to store the results. We'll also compare the traditional for-loop implementation with the Stream implementation, and discuss the advantages and disadvantages of each approach.

By the end of this video, you'll have a solid understanding of how to use the Stream API and Collectors to group and summarize data in #java 8.