Object oriented properties

 Object oriented Properties 

There are types of OOPS 

• Inheritance
• Constructor
• Function overloading 
• Class Security 
• Error handling (exceptions)
• Polymorphism

• Inheritance

Inheritance only use Multiple classes 

Types of classes in Inheritance 

1.Base class 

2.Derive class

• Rules of Inheritance

1.Inheritance cannot count main class

2.Only last class object create .

syntax

Derive class: base class 

• Single Inheritance 

Only one base class and derive class.

• Multiple Inheritance

class A show()

classB display():A

classC parameter():B

classD view():C

• Inheritance with parameter

eg. class A 

{

public void show (int a)

{

C.W(a);

}

}

•  Function Overloading

 Function name is similar but activities are different is called function overloading.

• C# maths function 

1.Max function 

All math function stored in math library.

syntax : consolewriteline(math. max(value))

• C# string handling function
• C# Bullion Expression

Bullion return two value :

1) True-(1)

2) False-(0)

eg. C.W(10>5);

      C.W(10==20);

      C.W(10>=10);

• Break statement

Break is always use in looping statement.

Break is keywords.

• Constructor 

Constructor is a object initialization process.

1.Variable with value called Initialization.

2.Variable without value called declaration.

•  Rules for Constructor 

1.Class name and methods name are similar.

eg. class My 

     {

     Public My()

{

}

}

2.Constructor not use void statement.

3.Constructor not use dot operator (m1.show)

• Class security

Class Abstraction 

1. Class cannot access in main body with object.

2. Abstract class is to be create using abstract keyword.

NOTE: Abstract class cannot create object 

            Abstract class only inherit.

• Exception handling 

       Exception handling is used to display logical error on computer screen 

eg. a=10

      b=0

       c=a/b;

error message (No. divisible by 0)

• Exception Handling Statement is a communication between exception Library to program

• Exception Handling Statement

1) Try-catch

2) finally

• Array

     Array is a collection of similar type data element

☆ Array Separator []

NOTE: Square Bracket is called Array Separator.

[value]--> size

a[5]

Q.How to create array

Syntax: int[] name =new int[size]

             int[] a=new int[5]