UNIVERSITY INSTITUTE COMPUTING
BSc (CS)/ BCA
Subject Name: Java Programming
Code: 22SCT-351/22CAT-351
JAVA PROGRAMMING DISCOVER . LEARN . EMPOWER
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Syllabus
Unit-I
Principles of Object-Oriented Programming
• Introduction: Introduction to Java, Basic Features, JVM Concepts, A Simple Java
Program, Primitive Data Type and Variables, Java Keywords,.
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Content
(Unit I)
Principles of Object-Oriented Programming
Chapter 1.1:
Lecture1.1.2-
1. OOPS Concept
2. C++ versus Java
3. JDK
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Objectives/Outcomes
CO1: Identify the ways to implement the inheritance concept in
the Java programming language.
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Programming languages
Fig 1: Programming languages[1].
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Object Oriented Programming
• Object-oriented programming (OOP) is at the core of Java
• All computer programs consist of two elements: code and data.
• These are the two paradigms that govern how a program is constructed. The first way
is called the process-oriented model. This approach characterizes a program as a
series of linear steps (that is, code). The process-oriented model can be thought of as
code acting on data.
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Object Oriented Programming Contd.
.
• Procedural languages such as C employ this model to considerable success
• To manage increasing complexity, the second approach, called object-oriented
programming, was conceived. Object-oriented programming organizes a program
around its data (that is, objects) and a set of well-defined interfaces to that data. An
object-oriented program can be characterized as data controlling access to code.
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Abstraction
• An essential element of object-oriented programming is abstraction.
• Humans manage complexity through abstraction. For example, people do not think
of a car as a set of tens of thousands of individual parts. They think of it as a well-
defined object with its own unique behavior.
• Data Abstraction is the property by virtue of which only the essential details are
displayed to the user.
• In java, abstraction is achieved by interfaces and abstract classes. We can achieve
100% abstraction using interfaces.
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Encapsulation
• Encapsulation is the mechanism that binds together code and the data it manipulates,
and keeps both safe from outside interference and misuse.
• One way to think about encapsulation is as a protective wrapper that prevents the
code and data from being arbitrarily accessed by other code defined outside the
wrapper.
Fig 2: Encapsulation[2]
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Encapsulation Example
Fig 3: Encapsulation Example[3]
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Inheritance
• Inheritance is the process by which one object acquires the properties of another
object.
• This is important because it supports the concept of hierarchical classification.
Fig 4: Inheritance[4]
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Inheritance Example
Fig 5: Inheritance Example[5]
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Polymorphism
• Polymorphism (from Greek, meaning “many forms”) is a feature that allows one
interface to be used for a general class of actions.
• Polymorphism in Java is a concept by which we can perform a single action in
different ways.
• There are two types of polymorphism in Java: compile-time polymorphism and
runtime polymorphism. We can perform polymorphism in java by method
overloading and method overriding.
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Polymorphism Example
Fig 6: Polymorphism Example[6]
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C++ versus Java
Fig 7: C++ Versus java[7]
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JDK (Java Development Kit)
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JDK (Java Development Kit)
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JDK (Java Development Kit)
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JDK (Java Development Kit)
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JDK (Java Development Kit)
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Permanent Path of JDK in Windows
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Setting Environment Variables
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Setting Environment Variables
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Setting Environment Variables
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Temporary path of JDK in Windows
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References
• Fig 1: https://www.digimat.in/nptel/courses/video/106105191/L01.html
• Fig 2: https://www.digimat.in/nptel/courses/video/106105191/L01.html
• Fig 3: https://www.digimat.in/nptel/courses/video/106105191/L01.html
• Fig 4: https://www.javatpoint.com/inheritance-in-java
• Fig 5: https://www.digimat.in/nptel/courses/video/106105191/L01.html
• Fig 6:https://www.digimat.in/nptel/courses/video/106105191/L01.html
• Fig 7: https://www.digimat.in/nptel/courses/video/106105191/L01.html
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References
• https://www.tutorialspoint.com/java/java_abstraction.htm
• https://www.tutorialspoint.com/java/java_encapsulation.htm
• https://www.tutorialspoint.com/java/java_inheritance.htm
• https://www.tutorialspoint.com/java/java_polymorphism.htm
• https://www.javatpoint.com/how-to-set-path-in-java
• https://www.java.com/en/download/help/path.xml
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THANK YOU
