updates :

- Using lambda expression to create cars
- Using spaces instead of tabs in pom.xml

factory/src/main/java/com/iluwatar/factory/App.java

@@ -43,8 +43,8 @@ public class App {
    * Program main entry point.
    */
   public static void main(String[] args) {
-    var car1 = CarsFactory.getCar(CarsFactory.CarType.FORD);
-    var car2 = CarsFactory.getCar(CarsFactory.CarType.FERRARI);
+    var car1 = CarsFactory.getCar(CarType.FORD);
+    var car2 = CarsFactory.getCar(CarType.FERRARI);
     LOGGER.info(car1.getDescription());
     LOGGER.info(car2.getDescription());
   }

factory/src/main/java/com/iluwatar/factory/CarType.java

@@ -0,0 +1,22 @@
+package com.iluwatar.factory;
+
+import java.util.function.Supplier;
+
+public enum CarType {
+  
+  /**
+   * Enumeration for different types of cars.
+   */
+  FORD(Ford::new), 
+  FERRARI(Ferrari::new);
+  
+  private final Supplier<Car> constructor; 
+  
+  CarType(Supplier<Car> constructor) {
+    this.constructor = constructor;
+  }
+  
+  public Supplier<Car> getConstructor() {
+    return this.constructor;
+  }
+}

factory/src/main/java/com/iluwatar/factory/CarsFactory.java

@@ -5,21 +5,10 @@ package com.iluwatar.factory;
  */
 public class CarsFactory {
   
-  /**
-   * Enumeration for different types of cars.
-   */
-  static enum CarType {
-    FORD, FERRARI
-  }
-  
   /**
    * Factory method takes as parameter a car type and initiate the appropriate class.
    */
   public static Car getCar(CarType type) {
-    switch (type) {
-      case FORD: return new Ford();
-      case FERRARI: return new Ferrari();
-      default: throw new IllegalArgumentException("Model not supported.");
-    }
+    return type.getConstructor().get();
   }
 }

factory/src/test/java/com/iluwatar/factory/CarsFactoryTest.java

@@ -8,7 +8,7 @@ class CarsFactoryTest {
 
 	@Test
 	void shouldReturnFerrariInstance() {
-		final var ferrari = CarsFactory.getCar(CarsFactory.CarType.FERRARI);
+		final var ferrari = CarsFactory.getCar(CarType.FERRARI);
 		assertTrue(ferrari instanceof Ferrari);
 	}