Assignment 3

OCP/ClientWithFactory.java

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+public class ClientWithFactory {
+    public static void main(String[] args) {
+        DeviceFactory smartphoneFactory = new SmartphoneFactory();
+        DeviceFactory laptopFactory = new LaptopFactory();
+
+        Device smartphone = smartphoneFactory.createDevice();
+        Device laptop = laptopFactory.createDevice();
+
+        smartphone.displayDetails();
+        laptop.displayDetails();
+    }
+}

OCP/Device.java

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+public interface Device {
+    void displayDetails();
+}

OCP/DeviceFactory.java

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+public interface DeviceFactory {
+    Device createDevice();
+}

OCP/DeviceType.java

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+public enum DeviceType {
+    SMARTPHONE,
+    LAPTOP
+}

OCP/Laptop.java

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+public class Laptop implements Device {
+    @Override
+    public void displayDetails() {
+        System.out.println("Laptop: Model Y, RAM: 16GB, Storage: 512GB");
+    }
+}

OCP/LaptopFactory.java

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+public class LaptopFactory implements DeviceFactory {
+    @Override
+    public Device createDevice() {
+        return new Laptop();
+    }
+}

OCP/Smartphone.java

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+public class Smartphone implements Device {
+    @Override
+    public void displayDetails() {
+        System.out.println("Smartphone: Model X, RAM: 8GB, Storage: 128GB");
+    }
+}

OCP/SmartphoneFactory.java

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+public class SmartphoneFactory implements DeviceFactory {
+    @Override
+    public Device createDevice() {
+        return new Smartphone();
+    }
+}

SRP_Example1/AreaCalculator.java

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+public class AreaCalculator {
+    public static double calculateArea(Rectangle rectangle) {
+        return rectangle.getLength() * rectangle.getWidth();
+    }
+}

SRP_Example1/AreaPrinter.java

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+public class AreaPrinter {
+    public static void printArea(Rectangle rectangle) {
+        double area = AreaCalculator.calculateArea(rectangle);
+        System.out.println("Area: " + area);
+    }
+}

SRP_Example1/Main.java

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+public class Main {
+    public static void main(String[] args) {
+        Rectangle rectangle = new Rectangle(5.0, 3.0);
+        AreaPrinter.printArea(rectangle);
+    }
+}

SRP_Example1/Rectangle.java

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+public class Rectangle {
+    private double length;
+    private double width;
+
+    public Rectangle(double length, double width) {
+        this.length = length;
+        this.width = width;
+    }
+
+    public double getLength() {
+        return length;
+    }
+
+    public double getWidth() {
+        return width;
+    }
+}

SRP_Example2/AreaCalculator.java

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+public class AreaCalculator {
+    public static double calculateArea(Rectangle rectangle) {
+        return rectangle.getLength() * rectangle.getWidth();
+    }
+}

SRP_Example2/FileWriterUtil.java

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+import java.io.FileWriter;
+import java.io.IOException;
+
+public class FileWriterUtil {
+    public static void writeToFile(String fileName, String content) {
+        try (FileWriter writer = new FileWriter(fileName)) {
+            writer.write(content);
+        } catch (IOException e) {
+            System.err.println("Error writing to file: " + e.getMessage());
+        }
+    }
+}

SRP_Example2/Main.java

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+public class Main {
+    public static void main(String[] args) {
+        Rectangle rectangle = new Rectangle(5.0, 3.0);
+
+        // Calculate area
+        double area = AreaCalculator.calculateArea(rectangle);
+        System.out.println("Calculated Area: " + area);
+
+        // Save area to a file
+        FileWriterUtil.writeToFile("area.txt", "Area: " + area);
+    }
+}

SRP_Example2/Rectangle.java

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+public class Rectangle {
+    private double length;
+    private double width;
+
+    public Rectangle(double length, double width) {
+        this.length = length;
+        this.width = width;
+    }
+
+    public double getLength() {
+        return length;
+    }
+
+    public double getWidth() {
+        return width;
+    }
+}