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Java Basic Oops Concept
The document provides an overview of key Object-Oriented Programming (OOP) concepts including classes, objects, abstraction, inheritance, interfaces, polymorphism, and encapsulation. It explains that classes are logical entities containing sets of objects, while objects are real-time entities identified by their identity, state, and behavior. Additionally, it discusses inheritance as a way to derive new classes from existing ones, and encapsulation as the process of wrapping code and data together.
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Introduction to Java programming and the concept of Object-Oriented Programming (OOP) as a key focus.
Key OOP concepts: Class, Object, Abstraction, Inheritance, Interface, Encapsulation, Polymorphism. Essential definitions like Identity, State, Behavior.
Definition of a Class as a logical entity representing a collection of objects.
Definition of Objects as real-time entities identified by Identity, State, and Behavior.
Abstraction defined as the elimination of unnecessary information, focusing on what is needed.
Inheritance explained as a class extending another class, noting two types: Single level and Multi level.
Example of Single Level Inheritance: Class A and Class B extending Class A.
Example of Multi Level Inheritance: Class A, Class B extending Class A, and Class C extending Class B.
Interface as a replacement for multiple inheritance, providing methods without implementation.
Polymorphism defined as 'many behaviors'; introduces two types of polymorphism.
Encapsulation described as wrapping code and data together into a single unit, akin to a capsule.
Closing remarks with reminders to subscribe for more content and contact information.
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Java Basic Oops Concept
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- 3. OOPS ▪ Class ▪ Object ▪Abstraction ▪ Inheritance ▪ Interface ▪ Encapsulation ▪ Polymorphism [email protected] Identity State Behavior
- 4. Class ▪ Class islogical entity ▪ Class contain set of objects or collection of objects [email protected]
- 5. Objects ▪ Objects arereal time entity ▪ Identify the object by its ▪ Identity ▪ State ▪ Behavior atozknow ledge.co m@gmail .com www.atozknowledge.com
- 6. Abstraction ▪ The generalmeaning for abstraction is ELIMINATION i.e fetching only the wanted information even though all information is available based on our need we are eliminating the unwanted information. atozknow ledge.co m@gmail .com www.atozknowledge.com
- 7. Inheritance ▪ When oneClass extends another Class. Deriving new class from the existing class parent child relationship Two types ▪ Single level ▪ Multi level [email protected]
- 8. Cont.. Single level Deriving anew class from the existing class(one to one) Example class A { } class B extends class A { } [email protected]
- 9. Cont.. Multi Level Deriving multilevelof new class from the parent Example class A{ } class B extends class A { } class C extends class B{ } [email protected]
- 10. Interface ▪ Replacement ofmultiple inheritance that has methods and method definition and no implementation [email protected]
- 11. Polymorphism ▪ The generalmeaning for POLY — many MORPHISM — behavior. Two types of polymorphism. [email protected]
- 12. Encapsulation ▪ Encapsulation isa process of wrapping code and data together into a single unit e.g. capsule i.e mixed of several medicines. [email protected]
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