Java Design Patterns

com/javadevjournal/design/structural/facade/FacadePatternClient.java

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+package javadevjournal.design.structural.facade;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+/**
+ * @author Kunwar
+ */
+public class FacadePatternClient {
+    private static int choice;
+
+    public static void main(String args[]) throws NumberFormatException, IOException {
+        do {
+            System.out.print("========= Mobile Shop ============ \n");
+            System.out.print("1. IPHONE.              \n");
+            System.out.print("2. SAMSUNG.              \n");
+            System.out.print("3. NOKIA.                 \n");
+            System.out.print("4. Exit.                   \n");
+            System.out.print("Enter your choice: ");
+
+            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+            choice = Integer.parseInt(br.readLine());
+            ShopKeeper shopKeeper = new ShopKeeper();
+
+            switch (choice) {
+                case 1: {
+                    shopKeeper.iphonePhoneSale();
+                }
+                break;
+                case 2: {
+                    shopKeeper.samsungPhoneSale();
+                }
+                break;
+                case 3: {
+                    shopKeeper.nokiaPhoneSale();
+                }
+                break;
+                default: {
+                    System.out.println("Nothing You purchased");
+                }
+                return;
+            }
+        } while (choice != 4);
+    }
+}  

com/javadevjournal/design/structural/facade/IMobileShop.java

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+package javadevjournal.design.structural.facade;
+
+/**
+ * @author Kunwar
+ */
+public interface IMobileShop {
+    /**
+     * Mobile Model Number
+     */
+    public void getMobileModelNumber();
+
+    /**
+     * Mobile Price
+     */
+    public void getMobilePrice();
+}  

com/javadevjournal/design/structural/facade/Iphone.java

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+package javadevjournal.design.structural.facade;
+
+/**
+ * @author Kunwar
+ */
+public class Iphone implements IMobileShop {
+    @Override
+    public void getMobileModelNumber() {
+        System.out.println("The model is: IPhone 13");
+    }
+
+    @Override
+    public void getMobilePrice() {
+        System.out.println("The price is: 75000INR ");
+    }
+} 

com/javadevjournal/design/structural/facade/Nokia.java

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+package javadevjournal.design.structural.facade;
+
+/**
+ * @author Kunwar
+ */
+public class Nokia implements IMobileShop {
+    @Override
+    public void getMobileModelNumber() {
+        System.out.println("The model is: Nokia 1100");
+    }
+
+    @Override
+    public void getMobilePrice() {
+        System.out.println("The price is: 1500INR ");
+    }
+}

com/javadevjournal/design/structural/facade/Samsung.java

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+package javadevjournal.design.structural.facade;
+
+/**
+ * @author Kunwar
+ */
+public class Samsung implements IMobileShop {
+    @Override
+    public void getMobileModelNumber() {
+        System.out.println("The model is: Galaxy 11");
+    }
+
+    @Override
+    public void getMobilePrice() {
+        System.out.println("The price is: 85000INR ");
+    }
+}  

com/javadevjournal/design/structural/facade/ShopKeeper.java

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+package javadevjournal.design.structural.facade;
+
+/**
+ * @author Kunwar
+ */
+public class ShopKeeper {
+    private IMobileShop iphone;
+    private IMobileShop samsung;
+    private IMobileShop nokia;
+
+    /**
+     * no args constructor
+     */
+    public ShopKeeper() {
+        iphone = new Iphone();
+        samsung = new Samsung();
+        nokia = new Nokia();
+    }
+
+    public void iphonePhoneSale() {
+        iphone.getMobileModelNumber();
+        iphone.getMobilePrice();
+    }
+
+    public void samsungPhoneSale() {
+        samsung.getMobileModelNumber();
+        samsung.getMobilePrice();
+    }
+
+    public void nokiaPhoneSale() {
+        nokia.getMobileModelNumber();
+        nokia.getMobilePrice();
+    }
+}