Скачать или смотреть 5) Java for Loop vs forEach: The REAL Difference 💡 (Consumer & Lambda Explained)

In this video, we start with the basics of iterating through a Java List using the normal for loop, the enhanced for-each loop, and the modern forEach() method introduced in Java 1.8.
Then, we go deeper and reveal what actually happens behind the scenes when you use forEach() — something most beginners never learn!

🎯 What You’ll Learn in This Video

✔ How to print values using:
• Classic for loop
• Enhanced for-each loop
• Java 8 forEach method

✔ Why Java introduced the forEach method in Java 1.8
✔ What is Consumer and why forEach needs it
✔ How forEach internally calls the accept method
✔ What is a functional interface
✔ How lambda expressions replace anonymous classes
✔ How to rewrite large anonymous classes into clean lambda code
✔ How forEach gives you one element at a time
✔ Real-time printing and processing of list values

🧩 Topics Covered in Detail

Creating a List

Iterating with three different loop techniques

Introduction to java.util.function.Consumer

Anonymous inner classes

Transitioning to lambda expressions

Rewriting forEach using:
🔹 Consumer object
🔹 Anonymous class
🔹 Lambda expression
🔹 Single-line lambda shorthand


🔍 Why This Video Is Important

Many Java learners use forEach() without knowing how it actually works internally.
This video not only teaches you how to use it, but also why it works — giving you a deeper understanding of Java's functional programming capabilities.

Perfect for:
➡ Java beginners
➡ Intermediate developers
➡ Students preparing for interviews
➡ Anyone learning Java 8+ features

🚀 What’s Coming Next

👉 Complete Stream API tutorial
👉 filter(), map(), reduce() explained
👉 Stream pipeline internal working
👉 Lambdas & functional programming deep dive

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