Java Stream groupingBy() Explained | Group Data Like a Pro
🚀 Learn how to use `groupingBy()` in Java Streams to organize and group data efficiently!
In this tutorial, we break down the powerful `Collectors.groupingBy()` method with simple explanations and real-world examples. By the end, you’ll be able to group data like a pro using Java Streams.
🔹 What you’ll learn:
What is `groupingBy()` in Java Streams
How grouping works internally
Grouping by single field (e.g., course)
Nested grouping (advanced concept)
Combining grouping with counting, averaging, and mapping
💡 Perfect for:
Beginners learning Java Streams
Developers preparing for coding interviews
Anyone who wants to write cleaner, functional Java code
📌 Example Covered:
Group students based on course and calculate average marks
🎯 Part of: Java Streams & Lambda Mastery 🚀
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