#21 - Java

Author: Josegs95

Roadmap/21 - CALLBACKS/java/Josegs95.java

@@ -0,0 +1,74 @@
+import java.util.Random;
+
+public class Josegs95 {
+    public static void main(String[] args) {
+        //Ejercicio
+        int n1 = 25;
+        int n2 = 67;
+        int result = sum(n1, n2, new Farewell() {
+            @Override
+            public void goodbye() {
+                System.out.println("Los números han sido sumados. Hasta otra!");
+            }
+        });
+
+        System.out.println(n1 + " + " + n2 + " = " + result);
+
+        //Reto
+        retoFinal();
+    }
+
+    public static void retoFinal(){
+        ClientMessages clientMessages = new ClientMessages() {
+            @Override
+            public void confirmed(String orderName) {
+                System.out.println("Tu pedido '" + orderName + "' está confirmado.");
+            }
+
+            @Override
+            public void ready(String orderName) {
+                System.out.println("Tu pedido '" + orderName + "' está listo para enviar.");
+            }
+
+            @Override
+            public void delivered(String orderName) {
+                System.out.println("Tu pedido '" + orderName + "' ha sido enviado.");
+            }
+        };
+        order("Hamburguesa doble", clientMessages);
+        order("Ensalada de pasta", clientMessages);
+    }
+
+    public static int sum(int n1, int n2, Farewell farewell){
+        int result = n1 + n2;
+
+        farewell.goodbye();
+
+        return result;
+    }
+
+    public static void order(String name, ClientMessages clientMessages){
+        Random rnd = new Random();
+        try{
+            clientMessages.confirmed(name);
+            Thread.sleep(rnd.nextInt(1, 11) * 1000);
+
+            clientMessages.ready(name);
+            Thread.sleep(rnd.nextInt(1, 11) * 1000);
+
+            clientMessages.delivered(name);
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public interface Farewell{
+        void goodbye();
+    }
+
+    public interface ClientMessages{
+        void confirmed(String orderName);
+        void ready(String orderName);
+        void delivered(String orderName);
+    }
+}