Java Code Visualizer
See how the JVM executes your Java code. Watch object creation on the heap, trace method calls through the stack, visualize garbage collection generations (Young, Old, Permanent), and understand OOP at a deeper level.
What You Can Visualize
Objects & Heap
Watch objects being allocated on the JVM heap. See fields, methods, and how references connect objects together.
Garbage Collection
Visualize Young Gen, Old Gen, and how the JVM decides when to garbage collect unreachable objects.
Inheritance & Polymorphism
See how method dispatch works with inheritance, overriding, interfaces, and dynamic binding.
Why Use a Java Visualizer?
Java's automatic memory management and OOP abstractions are powerful — but understanding what happens under the hood is essential for writing efficient code and acing technical interviews.
Code Visualizer shows you every step: from object creation to garbage collection, from method dispatch to exception handling. See the JVM as it truly works.