moven kotlin-maven project

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

@@ -0,0 +1,26 @@
+package com.baeldung.mavenjavakotlin;
+
+import com.baeldung.mavenjavakotlin.services.JavaService;
+import com.baeldung.mavenjavakotlin.services.KotlinService;
+
+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];
+        switch (language) {
+            case JAVA:
+                new JavaService().sayHello();
+                break;
+            case KOTLIN:
+                new KotlinService().sayHello();
+                break;
+            default:
+                // Do nothing
+                break;
+        }
+    }
+
+}

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

@@ -0,0 +1,9 @@
+package com.baeldung.mavenjavakotlin.services;
+
+public class JavaService {
+
+    public void sayHello() {
+        System.out.println("Java says 'Hello World!'");
+    }
+
+}

core-kotlin/src/main/kotlin/com/baeldung/mavenjavakotlin/services/KotlinService.kt

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