The document discusses object-oriented programming concepts like classes, objects, abstraction, encapsulation, inheritance, and polymorphism. It provides examples of modeling a banking application using OOP principles, with classes like BankAccount, SavingsAccount, and CurrentAccount. The key benefits of OOP like reusability and reducing redundant code are highlighted.

1. 19Z305OBJECT
ORIENTED
PROGRAMMING
Unit 1

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3. Overview
 Features of OOP
 Abstraction
 Classes and Objects
 Encapsulation
 Inheritance
 Polymorphism
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4. Problem Sheet
1
Suppose you want to automate saving account system of a bank.
Each account, has following information
Account No, Account Holder Name, Balance
Following Bank branch operations
Open an account
Deposit money into a account
Withdraw Money from Account
Transfer money between accounts
Get Account details
Close an account
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5. Procedural
Programming
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6. Procedural
Programming
 Principle: Functional Decomposition
 Drawback:
 Hard to include new features
 Spaghetti code
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7. Features of
OOP
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8. Classes &
Objects
Class <class name> {
}
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Data Members
Methods
How to represent Box as Class?

9. Classes &
Objects
Class <class name> {
}
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Data Members
Methods
Objects

10. Abstraction
Goal: to handle complexity by hiding unnecessary details from the user
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11. Encapsulation
Goal: binding object members and methods together and to keep
them safe from external interference
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Encapsulation Data Hiding Abstraction

12. Access
Specifiers
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13. Encapsulation
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14. Inheritance
Inherit common behaviors
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15. Inheritance
Goal: to improve reusability of the code and reduce redundant
code
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BankAccount
-withdraw()
-deposit()
-transfer()
SavingsAccount
-calculateInterest()
CurrentAccount
-calculateCharges()

16. Polymorphism
Ability to appear in many forms
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17. References
 "Java:The Complete Reference” by Schildt H - Part 1 - Chapter 2
 https://www.w3schools.com/java/
 https://docs.oracle.com/javase/tutorial/java/TOC.html
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