Small enhacements to Design patterns code snippets

Author: 100yo

13-design-patterns/snippets/design-patterns/behavioral/command/BuyStock.java

@@ -7,6 +7,7 @@ public BuyStock(Stock abcStock) {
         this.abcStock = abcStock;
     }
 
+    @Override
     public void execute() {
         abcStock.buy();
     }

13-design-patterns/snippets/design-patterns/behavioral/command/CommandPatternDemo.java

@@ -5,8 +5,8 @@ public class CommandPatternDemo {
     public static void main(String[] args) {
         Stock abcStock = new Stock();
 
-        BuyStock buyStockOrder = new BuyStock(abcStock);
-        SellStock sellStockOrder = new SellStock(abcStock);
+        Order buyStockOrder = new BuyStock(abcStock);
+        Order sellStockOrder = new SellStock(abcStock);
 
         Broker broker = new Broker();
         broker.takeOrder(buyStockOrder);

13-design-patterns/snippets/design-patterns/behavioral/command/SellStock.java

@@ -7,6 +7,7 @@ public SellStock(Stock abcStock) {
         this.abcStock = abcStock;
     }
 
+    @Override
     public void execute() {
         abcStock.sell();
     }

13-design-patterns/snippets/design-patterns/behavioral/strategy/StrategyPatternDemo.java

@@ -15,7 +15,7 @@ public static void main(String[] args) {
         cart.pay(new PaypalStrategy("[email protected]", "mypwd"));
 
         // pay by credit card
-        cart.pay(new CreditCardStrategy("Jeff Bezos", "1234567890123456", "786", "12/22"));
+        cart.pay(new CreditCardStrategy("Jeff Bezos", "1234567890123456", "786", "12/24"));
     }
 
 }