Added Section 5 Project

README.md

@@ -89,6 +89,28 @@ This repository will contain all materials used throughout the OS course 20/21
 
 • [2D-Arrays](https://www.programiz.com/java-programming/multidimensional-array)
 
+### 📖 Section 5 - Introduction to OOP, Classes and Objects.
+-------
+• [🎞 Section Presentation](https://drive.google.com/file/d/1U5_Xnv31veCmgiDudLDxIrAF2JSrurjr/view?usp=sharing)
+
+• [Java OOP - w3schools](https://www.w3schools.com/java/java_oop.asp)
+
+• [Java OOP - freecodecamp](https://www.freecodecamp.org/news/java-object-oriented-programming-system-principles-oops-concepts-for-beginners/)
+
+• [Java Classes and Objects - w3schools](https://www.w3schools.com/java/java_classes.asp)
+
+• [Java Classes and Objects - programiz](https://www.programiz.com/java-programming/class-objects)
+
+• [Java Classes and Objects - javatpoint](https://www.javatpoint.com/object-and-class-in-java)
+
+• [Class Attributes - w3schools](https://www.w3schools.com/java/java_class_attributes.asp)
+
+• [Class Methods - w3schools](https://www.w3schools.com/java/java_class_methods.asp)
+
+• [Java Constructors - javatpoint](https://www.javatpoint.com/java-constructor)
+
+
+
 
 
 

Section5/Section5.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

Section5/src/Section5.java

@@ -0,0 +1,76 @@
+public class Section5 {
+    public static void main(String[] args) {
+       BankAccount myAccount = new BankAccount(100);
+       myAccount.displayBalance();
+       myAccount.deposit(1000);
+       myAccount.displayBalance();
+       myAccount.withdraw(300);
+       myAccount.displayBalance();
+
+    }
+
+}
+
+class BankAccount {
+    double balance;
+    String accountHolder;
+    long accountNumber;
+    String password;
+
+    BankAccount(double initialBalance){
+        balance = initialBalance;
+    }
+
+    void withdraw(double amount) {
+        if (amount > balance) {
+            System.out.println("Invalid Balance");
+        } else {
+            balance = balance - amount;
+        }
+    }
+
+    void deposit(double amount) {
+        if (amount > 0) {
+            balance = balance + amount;
+        } else {
+            System.out.println("Invalid amount");
+        }
+    }
+
+    void displayBalance() {
+        System.out.println("Your balance = " + balance);
+    }
+}
+
+
+class Circle {
+    double radius;
+
+    //
+    Circle(double initialRadius) {
+        radius = initialRadius;
+
+    }
+
+    double calculateCircleArea() {
+        double area = 3.14 * radius * radius;
+        return area;
+    }
+}
+
+
+class Student {
+    String name;
+    int id;
+
+    int age;
+    boolean gender;
+
+    void breakfast() {
+
+    }
+
+    void study() {
+
+    }
+}