#27 - Java

Author: Josegs95

Roadmap/27 - SOLID OCP/java/Josegs95.java

@@ -0,0 +1,131 @@
+public class Josegs95 {
+    public static void main(String[] args) {
+        //Ejercicio
+        //Forma incorrecta
+        Object object1 = new WrongHuman();
+        if (object1 instanceof WrongHuman)
+            System.out.println("Los humanos se mueven a dos patas");
+        else if (object1 instanceof WrongCat)
+            System.out.println("Los gatos se mueven a cuatro patas");
+        else if (object1 instanceof WrongPigeon)
+            System.out.println("Las palomas se mueven por el aire volando");
+        else
+            System.out.println("Animal desconocido");
+
+        //Forma correcta
+        Object object2 = new Cat();
+        if (object2 instanceof Animal)
+            ((Animal) object2).move();
+        else
+            System.out.println("Animal desconocido");
+
+        //Reto
+        retoFinal();
+    }
+
+    public static void retoFinal(){
+        double result = Calculator.calculate(Calculator.Operations.SUMAR, 7, 8);
+        System.out.println("7 + 8 = " + result);
+
+        result = Calculator.calculate(Calculator.Operations.RESTAR, 1, 2.5);
+        System.out.println("1 - 2.5 = " + result);
+
+        result = Calculator.calculate(Calculator.Operations.MULTIPLICAR, 1.3, 4.6);
+        System.out.println("1.3 * 4.6 = " + result);
+
+        result = Calculator.calculate(Calculator.Operations.DIVIDIR, 2, 1.5);
+        System.out.println("2 / 1.5 = " + result);
+
+        result = Calculator.calculate(Calculator.Operations.POTENCIA, 5, 5);
+        System.out.println("5 ^ 5 = " + result);
+    }
+
+    public static class WrongHuman{}
+    public static class WrongCat{}
+    public static class WrongPigeon {}
+
+    public interface Animal{
+        public void move();
+    }
+    public static class Human implements Animal{
+        public void move(){
+            System.out.println("Los humanos se mueven a dos patas");
+        }
+    }
+    public static class Cat implements Animal{
+        public void move(){
+            System.out.println("Los gatos se mueven a cuatro patas");
+        }
+    }
+    public static class Pigeon implements Animal{
+        public void move(){
+            System.out.println("Las palomas se mueven por el aire volando");
+        }
+    }
+
+    public class Calculator{
+        public enum Operations{
+            SUMAR(new Sum()),
+            RESTAR(new Subtract()),
+            MULTIPLICAR(new Multiply()),
+            DIVIDIR(new Divide()),
+            POTENCIA(new Power());
+
+            private Operation operation;
+
+            Operations (Operation operation){
+                this.operation = operation;
+            }
+
+            public Operation getOperation(){
+                return operation;
+            }
+
+        }
+
+        public static double calculate(Operations operation, double n1, double n2){
+            return operation.getOperation().execute(n1, n2);
+        }
+
+    }
+    public interface Operation{
+        public double execute(double n1, double n2);
+    }
+    public static class Sum implements Operation{
+
+        public double execute(double n1, double n2) {
+            return n1 + n2;
+        }
+    }
+    public static class Subtract implements Operation{
+
+        @Override
+        public double execute(double n1, double n2) {
+            return n1 - n2;
+        }
+    }
+    public static class Multiply implements Operation{
+
+        @Override
+        public double execute(double n1, double n2) {
+            return n1 * n2;
+        }
+    }
+    public static class Divide implements Operation{
+
+        @Override
+        public double execute(double n1, double n2) {
+            return n1 / n2;
+        }
+    }
+    public static class Power implements Operation{
+
+        @Override
+        public double execute(double n1, double n2) {
+            double result = 1;
+            for (int i = 0; i < n2; i++)
+                result *= n1;
+            return result;
+        }
+    }
+}