This article explains five common Java memory leak scenarios—long-lived collections, unclosed resources, ThreadLocal misuse, inner class references, and unregistered listeners—with code examples and recommends MAT and VisualVM for leak detection.
This article explains Java's static nested classes, covering their definition, key characteristics, sample code for an e‑commerce order model, and common scenarios such as helper utilities, callbacks, singletons, and data‑structure encapsulation.
The article explains why a locally created ThreadPoolExecutor cannot be reclaimed by Java's garbage collector, detailing GC root analysis, the role of live threads, inner‑class references, static versus non‑static nesting, and how these concepts can cause memory leaks.
This article explains why non‑static inner classes in Java retain references to their outer class, causing memory leaks and eventual OutOfMemoryError, and demonstrates practical solutions such as avoiding references or converting the inner class to a static one, illustrated with code examples and debugging screenshots.
