Java Reference Types Explained | Strong vs Soft vs Weak vs Phantom (GC Demo)
Understanding reference types in Java is critical for mastering memory management and garbage collection.
In this video, we deep-dive into:
🔹 Strong References – why objects never get collected
🔹 Soft References – how JVM handles memory pressure
🔹 Weak References – when objects become eligible for GC
🔹 Phantom References – post-GC cleanup and reference queues
You’ll see:
✔ Clear heap diagrams
✔ Live GC demo with JVM flags
✔ How references behave under low memory (-Xmx)
✔ Why finalize() is deprecated
✔ Real interview-oriented explanations
This video is perfect for:
Java Developers
Backend Engineers
Interview Preparation (Java, JVM, GC)
System Design & Performance tuning
📌 Watch till the end to clearly understand when and why each reference type is used.