This Java program demonstrates abstract classes and inheritance using a base class Shape and two subclasses: Triangle and Rectangle. 🔹 Classes: Shape: Abstract class with side, area, and perimeter.

Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications. This Java tutorial teaches you how to declare classes, describe attributes via fields, ...

Due to Java’s Reflection API we have been able to inspect and alter program execution at runtime. In particular, we can observe interfaces/classes/methods and fields at runtime without knowing their ...