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Architect's Tech Stack
Architect's Tech Stack
Jun 5, 2021 · Fundamentals

Understanding Java Object Memory Layout and the Size of new Object()

This article explains how Java objects are stored in memory, analyzes the heap layout, object header, instance data, and padding, demonstrates the byte size of a new Object() with and without compressed OOPs, and discusses object access methods and garbage‑collection regions.

Garbage CollectionJVMJava
0 likes · 12 min read
Understanding Java Object Memory Layout and the Size of new Object()
Qunar Tech Salon
Qunar Tech Salon
Apr 9, 2019 · Fundamentals

Understanding Java Object Memory Layout and the Oop‑Klass Model

This article explains the JVM Oop‑Klass model, details how Java objects are represented in heap memory, shows how to calculate their size using source code analysis, HSDB, Instrumentation, Unsafe, and third‑party tools, and provides practical examples and code snippets.

HSDBInstrumentationJVM
0 likes · 15 min read
Understanding Java Object Memory Layout and the Oop‑Klass Model