java basic oops concept
DESCRIPTION
Java Basic Oops Concept with short and neat example and diagrams www.atozknowledge.com Technology in tamilTRANSCRIPT
OOPS
▪ Class
▪ Object
▪ Abstraction
▪ Inheritance
▪ Interface
▪ Encapsulation
▪ Polymorphism
Identity
State
Behavior
Class
▪ Class is logical entity
▪ Class contain set of objects or collection of objects
Objects
▪ Objects are real time entity
▪ Identify the object by its ▪ Identity
▪ State
▪ Behavior
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Abstraction
▪ The general meaning 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.
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Inheritance
▪ When one Class extends another Class. Deriving new class from the existing class parent child relationship
Two types
▪ Single level
▪ Multi level
Cont..
Single level
Deriving a new class from the existing class(one to one)
Example
class A
{
}
class B extends class A
{
}
Cont..
Multi Level
Deriving multilevel of new class from the parent
Example
class A{
}
class B extends class A {
}
class C extends class B{
}
Interface
▪ Replacement of multiple inheritance that has methods and method definition and no implementation
Polymorphism
▪ The general meaning for POLY — many MORPHISM — behavior. Two types of polymorphism.
Encapsulation
▪ Encapsulation is a process of wrapping code and data together into a single unit e.g. capsule i.e mixed of several medicines.
