Added Strategy

Author: NadavMozeson

src/BehavioralPatterns/StrategyDP/Main.java

@@ -0,0 +1,10 @@
+package BehavioralPatterns.StrategyDP;
+
+public class Main {
+    public static void main(String[] args){
+        PaymentService paymentService1 = new PaymentService(100, new PaymentByPayPal());
+        PaymentService paymentService2 = new PaymentService(50, new PaymentByCard());
+        paymentService1.processPayment();
+        paymentService2.processPayment();
+    }
+}

src/BehavioralPatterns/StrategyDP/PaymentByCard.java

@@ -0,0 +1,8 @@
+package BehavioralPatterns.StrategyDP;
+
+public class PaymentByCard implements PaymentMethod{
+    @Override
+    public void pay(int amount) {
+        System.out.println("Payed " + amount + " using Credit Card");
+    }
+}

src/BehavioralPatterns/StrategyDP/PaymentByPayPal.java

@@ -0,0 +1,8 @@
+package BehavioralPatterns.StrategyDP;
+
+public class PaymentByPayPal implements PaymentMethod{
+    @Override
+    public void pay(int amount) {
+        System.out.println("Payed " + amount + " using PayPal");
+    }
+}

src/BehavioralPatterns/StrategyDP/PaymentMethod.java

@@ -0,0 +1,5 @@
+package BehavioralPatterns.StrategyDP;
+
+public interface PaymentMethod {
+    void pay(int amount);
+}

src/BehavioralPatterns/StrategyDP/PaymentService.java

@@ -0,0 +1,15 @@
+package BehavioralPatterns.StrategyDP;
+
+public class PaymentService {
+    private final int price;
+    private final PaymentMethod method;
+
+    public PaymentService(int price, PaymentMethod method) {
+        this.price = price;
+        this.method = method;
+    }
+
+    public void processPayment() {
+        method.pay(price);
+    }
+}