Скачать или смотреть Java 8 GroupingBy Collector | Group Employees by Department | Java Streams

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In this video, we will learn about Java 8 Streams Collectors.groupingBy() with a simple and beginner-friendly example.
We will group a list of employees by their department using Java 8 Streams.

📌 What you’ll learn in this video:

What is Collectors.groupingBy() in Java 8

How to group objects based on a property (like department, category, grade, etc.)

Difference between groupingBy and partitioningBy

Real-world use cases in interviews and projects

This is one of the most frequently asked Java 8 interview questions, so make sure you understand it well.

💡 Example:

Input: List of employees with names & departments

Output: Map of departments → list of employees

📖 Code and Concept explained in simple Hinglish for beginners.

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