Use a Scenario to explain the 4 pillars of OOP in Java and be able to define each one of them, being able to put your knowledge of OOP into "code form", and the 7 Layers of OSI Networking model.
Use a Scenario to explain the 4 pillars of OOP in Java and be able to define each one of them, being able to put your knowledge of OOP into "code form", and the 7 Layers of OSI Networking model.
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Transcribed Image Text:### Understanding Object-Oriented Programming (OOP) and OSI Networking Model
#### Learning Objectives:
1. **Understand the 4 pillars of Object-Oriented Programming (OOP) using Java.**
2. **Express these OOP concepts in code form.**
3. **Comprehend the 7 Layers of the OSI Networking Model.**
#### OOP in Java: The 4 Pillars
Object-Oriented Programming (OOP) involves four foundational concepts. Let's explain each, with a scenario and code examples.
1. **Encapsulation**
**Scenario**: Imagine a capsule with medicine inside. The capsule encloses the medicine, providing protection and controlled access. Similarly, in OOP, encapsulation means binding the data and the methods that manipulate the data together, and restricting access to some of the object's components.
**Code Example**:
```java
public class Student {
private String name;
private int age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
```
2. **Inheritance**
**Scenario**: Consider a family tree where traits are passed from parents to children. Similarly, in OOP, inheritance allows a class to inherit properties and behavior (methods) from another class.
**Code Example**:
```java
public class Person {
protected String name;
public void display() {
System.out.println("Name: " + name);
}
}
public class Student extends Person {
private int studentId;
public void displayId() {
System.out.println("Student ID: " + studentId);
}
}
```
3. **Polymorphism**
**Scenario**: Think of a person who can be a student, teacher, or athlete at different times. Similarly, in OOP, polymorphism allows methods to do different things based on the object it is acting upon, even if they share the same name.
**Code Example**:
```java
public class Animal {
public void sound() {
System.out.println("Animal makes a sound");
}
}
public class Dog extends Animal {
public void sound() {
System.out.println("
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