#Java oops concepts code

PolymorphismĪnother important concept in Java is Polymorphism which means performing a single action in many different ways. Without wasting your time, you can create the same property of a class by sharing the attributes of an already existing class. Using the extend keyword, you can implement the inheritance concept. It is like a relationship between parent-child. A class can easily inherit the properties of another class using the inheritance concept in OOPs. Inheritance is another main concept of OOPs used in Java in which an object inherits another object’s properties, it supports hierarchical classification. A real-life example of abstraction is an ATM machine that only shows you the amount to be taken out and hides the PIN which is confidential. Abstract has abstract classes and abstract methods.Īn abstract class defines the type of class declaring one or more abstract methods whereas abstract methods have the definition of the method, not the implementation. The properties and behavior of an object differentiate it from other objects of similar type.

#Java oops concepts code

In Java programs, abstraction is objects, classes, and variables that represent more complex code and data.

The main objective of abstraction is data hiding which reduces the complexity of a program. AbstractionĪbstraction is a process that only displays the information which is necessary, the rest of other is hidden. The best example is “Car” which is a class and “Mercedes”, “Audi”, and “BMW” are the objects in the class Car.Īpart from object and class, the basic and most important concepts are Abstraction, Inheritance, Polymorphism, and Encapsulation. Multiple objects can be created using classes with the same behavior which saves the time of writing the same code multiple times.Īll the objects and methods in a class have the same properties. A class contains fields, methods, and constructors. Class is a collection of objects, which don’t consume any space in the memory. The second important concept of OOPs in Java is class. Also, it has some properties and functions. Like a dog, or chair, which has its attributes, an object in a program also has the same. Objects are the basic concept of OOPs which contains a real-world entity that takes up some space to store the data.Īn object can be created in Java with many objects, which could be invoked by interacting methods. Objects are self-contained consisting of methods and properties. Just like a simple object (in the real world), objects in Java also have a state and behavior. Objects are created in a class, also called as instances of a class. If you’re a beginner and searching for a course which can give you an in-depth knowledge of Java, Java for Beginners is the best course which you can enroll in and dive deep into the concepts of Java. It allows the Java program to create methods and variables and use them in the program taking care of its security as well. Java is an object-oriented programming language that helps the program to improve its readability and reusability. It works mainly to bind the data together and the functions that operate on them so that no other part of the code can access the data except that function. OOPs, are used to work on real-world entities like inheritance, hiding, polymorphism, etc. Here, the entities are referred to as objects which could be used in the program so as to do the operations. You have to define the type of data (data types like int, float, double, etc.) of the data structure and the operations applied to it. Object-oriented programming is used to design a program that could use classes, objects, methods, etc.