Tagged articles

Wrapper Class

2 articles · Page 1 of 1

May 24, 2026 · Fundamentals

Java Wrapper Classes Explained: Autoboxing, Unboxing, Integer Cache Pitfalls & Common APIs

The article explains Java's primitive types versus object types, introduces wrapper classes such as Integer, Double and Boolean, demonstrates manual and automatic boxing/unboxing, reveals the -128~127 Integer cache trap, shows common wrapper APIs, and warns about null‑unboxing NPEs.

AutoboxingCollectionsJava

0 likes · 6 min read

Java Wrapper Classes Explained: Autoboxing, Unboxing, Integer Cache Pitfalls & Common APIs

Selected Java Interview Questions

Feb 27, 2022 · Backend Development

Why Using isXXX Naming for Boolean Fields in Java Is Discouraged

The article explains Java naming conventions for primitive boolean and Boolean types, shows examples of getters and setters, discusses JavaBeans rules and RPC serialization issues, and recommends using wrapper types for POJOs while keeping primitives for local variables.

JavaBeansNaming ConventionRPC

0 likes · 5 min read

Why Using isXXX Naming for Boolean Fields in Java Is Discouraged