[BAEL-1835] Added dummy KotlinService

maven-java-kotlin/src/main/java/com/baeldung/mavenjavakotlin/Application.java

@@ -5,6 +5,7 @@ import com.baeldung.mavenjavakotlin.services.JavaService;
 public class Application {
 
   private static final String JAVA = "java";
+  private static final String KOTLIN = "kotlin";
 
   public static void main(String[] args) {
     String language = args[0];
@@ -12,6 +13,9 @@ public class Application {
       case JAVA:
         new JavaService().sayHello();
         break;
+      case KOTLIN:
+        new KotlinService().sayHello();
+        break;
       default:
         // Do nothing
         break;

maven-java-kotlin/src/main/java/com/baeldung/mavenjavakotlin/services/JavaService.java

@@ -3,7 +3,7 @@ package com.baeldung.mavenjavakotlin.services;
 public class JavaService {
 
   public void sayHello() {
-    System.out.println("Java says 'Hello!'");
+    System.out.println("Java says 'Hello World!'");
   }
 
 }

maven-java-kotlin/src/main/kotlin/com/baeldung/mavenjavakotlin/KotlinService.kt

@@ -0,0 +1,9 @@
+package com.baeldung.mavenjavakotlin
+
+class KotlinService {
+
+  fun sayHello() {
+    System.out.println("Kotlin says 'Hello World!'")
+  }
+
+}