Java Beans are examples of fully encapsulated classes. Object Oriented Programming also addresses several other weaknesses of the other programming techniques (unstructured, procedural and modular). For example, a capsule, it is wrapped with different medicines. Association simply means the act of establishing a relationship between two unrelated classes. In Java, we use method overloading and method overriding to achieve polymorphism. Example of dynamic polymorphism in Java is method overriding. Abstraction aims to hide complexity from the users and show them only the relevant information. It’s frequently referred to as a blueprint of a class as well. Besides the four main principles of OOP, Java also works with three further concepts (association, aggregation, composition) you can make use of when designing your programs. Here we discuss about what are the features of Object Oriented Programming, writing object-oriented programs, creating objects from those classes, creating applications with examples. Developed by JavaTpoint. OOPs concepts in Java Object-Oriented Programming (OOPs) concepts in Java helps in creating programs that are based on real world. What are the three usages of Java super keyword? Object 2. Parent classes are also called superclasses or base classes, while child classes are known as subclasses or derived classes as well. Method overloading happens when various methods with the same name are present in a class. In the console, the concrete method has been called from the Animal abstract class, while the two abstract methods have been called from Bird() and Fish(), respectively. 2) OOPs provides data hiding, whereas, in a procedure-oriented programming language, global data can be accessed from anywhere. Example of static polymorphism in Java is method overloading. Meaning, it supports different programming approach.One of the popular approach to solve a programming problem is by creating objects. For example, when you declare two fields of different types (e.g. Besides the 4 main OOP principles, Java also has association, aggregation, and composition. In the console, we can see that Java could have differentiated the three polymorphic fly() methods: By using the method overriding feature of Java, you can override the methods of a parent class from its child class. Collection of objects is called class. Object-Oriented Programming (OOP) uses "objects" to model realworld objects. Aggregation 5. This tutorial covers complete object oriented programming (oops) concepts in java. You can implement encapsulation in Java by keeping the fields (class variables) private and providing public getter and setter methods to each of them. Hiding internal details and showing functionality is known as abstraction. Restricts direct access to data members (fields) of a class. Java OOPS Concepts. Being an object-oriented language, it supports OOPS concepts. Object-Oriented Programming (OOP) consist of some important concepts namely Encapsulation, Polymorphism, Inheritance and Abstraction. Multilevel inheritance is allowed in Java (a child class can have its own child class as well). Here are the four main principles in more detail. JavaScript and VBScript are examples of object-based programming languages. You can take a pdf of each program along with source codes & outputs. In the example, the Eagle class extends the Bird parent class.