🔸 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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