🔸 THE QUIZ (TRY BEFORE YOU SCROLL)

What minimum Java version do you need to compile this?

🔸 PICK ONE

▪️ Java 1.2

▪️ Java 1.3

▪️ Java 1.4

▪️ Java 7

▪️ Java 15

👇 Comment your guess first… then check the answer.

🔸 THE ANSWER

✅ Java 1.4

🔸 TLDR

▪️ ByteBuffer comes from java.nio

▪️ java.nio arrived in Java 1.4 ✅

▪️ Java 7 later expanded this space a lot with NIO.2 (java.nio.file)

🔸 WHY (SIMPLE ENGLISH)

ByteBuffer is part of NIO (“New I/O”), under the package java.nio.

That API family appeared in Java 1.4, so anything older won’t have it.

🔸 WHAT NIO BROUGHT (IN PRACTICE)

Compared to classic java.io streams, NIO introduced lower-level building blocks that are great for performance and advanced I/O:

▪️ Buffers (like ByteBuffer) that manage data with position / limit / mark

▪️ Channels (like FileChannel) for reading/writing data efficiently

▪️ Better foundations for non-blocking patterns and memory-mapped files

🔸 MINI EXAMPLE (NIO “FEEL”)

🔸 TAKEAWAYS

▪️ If you see java.nio.*, think Java 1.4+

▪️ If you see java.nio.file.*, think Java 7+ (NIO.2)

▪️ Knowing “when an API appeared” is a fast way to answer version questions ⚡

#Java #JDK #JavaNIO #NIO #ByteBuffer #JavaQuiz #Programming #SoftwareEngineering #Backend #Developers

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