OOPS CONCEPTS IN JAVA

OOPS CONCEPTS IN JAVA

In java oops is also called as Object Oriented Programming Language.

OBJECT ORIENTED CONCEPTS:

Java is an Object-Oriented Language that supports the following fundamental concepts are;

• Polymorphism
• Inheritance
• Encapsulation
• Abstraction
• Class
• Object
• Instance
• Method
• Message passing

1. Polymorphism:

If one task is performed in different ways, it is known as polymorphism.

It is the feature of "one name many forms" method performs different tasks.

Types of polymorphism:-

      * Compile time polymorphism.

      * Run-time polymorphism.

2. Inheritance:

It is the process of creating a new class from existing class.

Base class is parent class and child class is sub class.

When one of the object acquires all the properties and behaviors of a parent object, it is known as inheritance.

3. Encapsulation:

Binding (or wrapping) code and data together into a single unit are known as encapsulation.

4. Abstraction:

Hiding internal details and showing the functionality is known as abstraction.

5. Class:

It is a container for data and functions.

It is a ‘blueprint’ for creating an objects.

Collection of objects are called class. It is a logical entity.

6. Objects:

It is instance of a class.

Object can create multiple objects with same behavior, instead of repeating code.

Any entity that has state and behavior is known as an object.

For example, a chair, pen, table, keyboard, bike, etc. 

7. Instance:

An Object can be defined as an instance of a class. An object contains an address and takes up some space in memory.

8. Method:

Method is a collection of statements that perform some specific task and return the result to the caller.

9. Message Passing:

Message Passing is nothing but sending and receiving of information by the objects.

Sending messages from one thread to another.