Java Record Type: Syntax, Constructors and Examples
Learn the Java record with examples of compact constructors, methods, generics, immutability, serialization and when a record should not replace a class.
Java Wrapper Classes: Autoboxing, Unboxing and Pitfalls
Java wrapper classes explained with autoboxing and unboxing, valueOf() vs parseInt(), the Integer cache, == and null pitfalls, and examples on Java 25.
Data Types in Java: Primitive vs Reference with Examples
Data types in Java with examples covering the 8 primitive types, sizes and ranges, reference types, literals, wrapper classes and choosing a type.
Java Primitive Data Types: Sizes, Ranges and Defaults
Java has eight primitive data types that hold plain values, not object references. Sizes, ranges, defaults, literals, overflow, floating-point precision, casting rules and wrapper classes, with tested Java 25 examples.