ABSTRACT
This chapter explains Object-Oriented Programming (OOP), including what classes and objects are, as well as modifiers and interfaces. OOP is a programming approach or paradigm that uses classes and objects to create a program. It makes software development and maintenance more accessible. Polymorphism refers to the notion that the same task may be completed in a number of different ways. To persuade a consumer in a new way, draw a form, triangle, rectangle, or another object. To accomplish polymorphism in Java, the users employ method overloading and method overriding. Encapsulation is demonstrated through a Java class. Because all data members are private in a Java bean, it is a fully enclosed class. Aggregation is a technique for achieving Association, and refers to a connection in which one object's state includes other things. A constructor can be included in an enum, and it is run independently for each enum constant when the enum class is loaded.
