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OOP/Java/Lab/Week8/HardSoftWareComp/HardSoftWareComp.java

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+interface Item {
+    double calculateSales();
+}
+
+class Hardware implements Item {
+
+    private String category;
+    private String manufacturer;
+    private double[] salesLastThreeMonths = new double[3];
+
+    public Hardware(String category, String manufacturer, double[] sales) {
+        this.category = category;
+        this.manufacturer = manufacturer;
+        this.salesLastThreeMonths = sales;
+    }
+
+    @Override
+    public double calculateSales() {
+        double total = 0;
+        for (double sale : salesLastThreeMonths) {
+            total += sale;
+        }
+        return total;
+    }
+}
+
+class Software implements Item {
+
+    private String type;
+    private String operatingSystem;
+    private double[] salesLastThreeMonths = new double[3];
+
+    public Software(String type, String operatingSystem, double[] sales) {
+        this.type = type;
+        this.operatingSystem = operatingSystem;
+        this.salesLastThreeMonths = sales;
+    }
+
+    @Override
+    public double calculateSales() {
+        double total = 0;
+        for (double sale : salesLastThreeMonths) {
+            total += sale;
+        }
+        return total;
+    }
+}
+
+public class HardSoftWareComp {
+
+    public static void main(String[] args) {
+        Hardware hardware = new Hardware(
+            "Laptop",
+            "Dell",
+            new double[] { 1000, 1500, 2000 }
+        );
+        Software software = new Software(
+            "Antivirus",
+            "Windows",
+            new double[] { 500, 750, 1000 }
+        );
+
+        System.out.println(
+            "Total Hardware Sales: INR " + hardware.calculateSales()
+        );
+        System.out.println(
+            "Total Software Sales: INR " + software.calculateSales()
+        );
+    }
+}