OOP Tasks added

OOP Tasks/OnlineShopping/.gitignore

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+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

OOP Tasks/OnlineShopping/OnlineShopping.iml

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+<?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>

OOP Tasks/OnlineShopping/src/Main.java

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+public class Main {
+    public static void main(String[] args) {
+        // Add Products
+        Product product1 = new Product("Shoes",60); // change productPrice to positive number to the make the system works.
+        Product product2 = new Product(null,1000.6); // change productName to string to the make the system works.
+        Product product3 = new Product("Dress",1000.33);
+        Product product4 = new Product("Trousers",1000.5);
+
+        // Add Products to Shopping Cart
+        ShoppingCart cart1 = new ShoppingCart();
+        cart1.addItem(product1);
+        cart1.addItem(product4);
+
+        // Display Total Cost
+        cart1.calculateTotalCost();
+
+        // Print Order
+        OrderProcessor order = new OrderProcessor();
+        order.placeOrder(cart1);
+    }
+}

OOP Tasks/OnlineShopping/src/OrderProcessor.java

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+public class OrderProcessor{
+    public OrderProcessor(){
+    }
+    public void placeOrder(ShoppingCart cart){
+        cart.printItems();
+        cart.calculateTotalCost();
+    }
+}

OOP Tasks/OnlineShopping/src/Product.java

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+public class Product {
+    private String productName;
+    private double productPrice;
+
+    public Product(String productName, double productPrice) {
+        try{
+            if (productPrice < 0) throw new RuntimeException();
+        }
+        catch (RuntimeException e) {
+            System.out.println("Product Price cannot be less than 0");
+            System.exit(0);
+        }
+        try{
+            if (productName.isEmpty() || productName == null) throw new RuntimeException();
+        }
+        catch (RuntimeException e) {
+            System.out.println("Product Name can't be empty or null");
+            System.exit(0);
+        }
+        if (!productName.isEmpty() && productName != null) this.productName = productName;
+        if(productPrice > 0) this.productPrice = productPrice;
+    }
+
+    public String getProductName() {
+        return productName;
+    }
+    public double getProductPrice() {
+        return productPrice;
+    }
+}

OOP Tasks/OnlineShopping/src/ShoppingCart.java

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+import java.util.ArrayList;
+
+public class ShoppingCart {
+    ArrayList<Product> cart;
+    public ShoppingCart() {
+        this.cart = new ArrayList<>();
+    }
+    protected void addItem(Product product){
+        cart.add(product);
+    }
+    protected void removeItem(Product product){
+        cart.remove(product);
+    }
+    protected void retrieveItem(){
+
+
+    }
+    protected void calculateTotalCost(){
+        float totalCost = 0;
+        for (Product p: cart) totalCost += p.getProductPrice();
+        System.out.println("The Total Cost is " + totalCost);
+
+    }
+    protected void printItems(){
+        System.out.println("The Order: ");
+        for(Product c:cart)
+            System.out.println("product name: " + c.getProductName() + " price: " + c.getProductPrice());
+    }
+}

OOP Tasks/Word Count/.gitignore

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+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

OOP Tasks/Word Count/Lincoln.txt

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+Java is /a -programming ,language.
+Java is _easy.
+the file contains 8
+

OOP Tasks/Word Count/Task 2-Word Count.iml

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+<?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>

OOP Tasks/Word Count/src/Main.java

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+import java.io.*;
+import java.util.Scanner;
+
+public class Main {
+    public static void main(String[] args) {
+        try {
+            File file =  new File("Lincoln.txt");
+            Scanner scanner = new Scanner(file);
+            int count = 0;
+            while (scanner.hasNext()) {
+                scanner.next();
+                count++;
+            }
+            scanner.close();
+
+            BufferedWriter writer = new BufferedWriter(new FileWriter(file, true));
+            String str = "the file contains " + count + '\n';
+            writer.write(str);
+            writer.newLine();
+            writer.close();
+
+        } catch (FileNotFoundException e) {
+            System.out.println(e.getMessage());
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}