The fields of a class can be made read-only or write-only.Ī class can have total control over what is stored in its fields. ![]() This will produce the following result − Output ("Name : " + encap.getName() + " Age : " + encap.getAge()) In a programming language exhibiting polymorphism, class objects belonging to the same hierarchical tree (inherited from a common parent class) may have functions with the same name, but with different. The variables of the EncapTest class can be accessed using the following program − Polymorphism is an object-oriented programming concept that refers to the ability of a variable, function, or object to take on multiple forms. Therefore, any class that wants to access the variables should access them through these getters and setters. Polymorphism in Java Leverages Extensibility Polymorphism leverages extensibility. ![]() There are two types of polymorphism in Java: compile-time polymorphism and runtime polymorphism. The word 'poly' means many and 'morphs' means forms. Polymorphism is derived from 2 Greek words: poly and morphs. This article is a attempt to explore the concept with a focus on Java with appropriate illustrations and examples. Polymorphism in Java is a concept by which we can perform a single action in different ways. Normally, these methods are referred as getters and setters. Polymorphism in Java simplifies programming by providing a single interface overlaid with multiple meanings as it goes through the rigor of subclassing. When the method is overridden in a class, the dynamic method dispatch technique resolves the overridden method call at runtime and not at compile time. Method overriding is a technique by which a method in the parent class is redefined or overridden in the child class. The public setXXX() and getXXX() methods are the access points of the instance variables of the EncapTest class. Runtime polymorphism in Java is achieved by using method overriding. Provide public setter and getter methods to modify and view the variables values.įollowing is an example that demonstrates how to achieve Encapsulation in Java − Therefore, it is also known as data hiding.ĭeclare the variables of a class as private. In encapsulation, the variables of a class will be hidden from other classes, and can be accessed only through the methods of their current class. ![]() These concepts aim to implement real-world entities in programs. The OOPs Concepts in Java are abstraction, encapsulation, inheritance, and polymorphism. OOPs in Java organizes a program around the various objects and well-defined interfaces. Therefore, it is also known as data hiding. OOPs stands for Object-oriented programming. The other three are inheritance, polymorphism, and abstraction.Įncapsulation in Java is a mechanism of wrapping the data (variables) and code acting on the data (methods) together as a single unit. Encapsulation in Java is a mechanism of wrapping the data (variables) and code acting on the data (methods) together as a single unit. Encapsulation is one of the four fundamental OOP concepts.
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