diff --git a/vertx/src/main/java/com/baeldung/HelloVerticle.java b/vertx/src/main/java/com/baeldung/HelloVerticle.java
index 98d1b336a3..59baceb0d8 100644
--- a/vertx/src/main/java/com/baeldung/HelloVerticle.java
+++ b/vertx/src/main/java/com/baeldung/HelloVerticle.java
@@ -10,6 +10,11 @@ import io.vertx.core.Vertx;
 public class HelloVerticle extends AbstractVerticle {
     private static final Logger LOGGER = LoggerFactory.getLogger(HelloVerticle.class);
 
+    public static void main(String[] args) {
+        Vertx vertx = Vertx.vertx();
+        vertx.deployVerticle(new HelloVerticle());
+    }
+
     @Override
     public void start(Future<Void> future) {
         LOGGER.info("Welcome to Vertx");
@@ -19,10 +24,5 @@ public class HelloVerticle extends AbstractVerticle {
     public void stop() {
         LOGGER.info("Shutting down application");
     }
-
-    public static void main(String[] args) {
-        Vertx vertx = Vertx.vertx();
-        vertx.deployVerticle(new HelloVerticle());
-    }
 }
 
diff --git a/vertx/src/main/java/com/baeldung/SimpleServerVerticle.java b/vertx/src/main/java/com/baeldung/SimpleServerVerticle.java
index 2cee37903b..6b56896860 100644
--- a/vertx/src/main/java/com/baeldung/SimpleServerVerticle.java
+++ b/vertx/src/main/java/com/baeldung/SimpleServerVerticle.java
@@ -4,21 +4,21 @@ import io.vertx.core.AbstractVerticle;
 import io.vertx.core.Future;
 
 public class SimpleServerVerticle extends AbstractVerticle {
-    
+
     @Override
     public void start(Future<Void> future) {
         vertx.createHttpServer()
-            .requestHandler(request -> {
-                request.response()
-                    .end("Welcome to Vert.x Intro");
-            })
-            .listen(config().getInteger("http.port", 8080), result -> {
-                if (result.succeeded()) {
-                    future.complete();
-                } else {
-                    future.fail(result.cause());
-                }
-            });
+                .requestHandler(request -> {
+                    request.response()
+                            .end("Welcome to Vert.x Intro");
+                })
+                .listen(config().getInteger("http.port", 8080), result -> {
+                    if (result.succeeded()) {
+                        future.complete();
+                    } else {
+                        future.fail(result.cause());
+                    }
+                });
     }
 
 }
diff --git a/vertx/src/main/java/com/baledung/rest/RestServiceVerticle.java b/vertx/src/main/java/com/baledung/rest/RestServiceVerticle.java
index 181b3007d5..802f74942e 100644
--- a/vertx/src/main/java/com/baledung/rest/RestServiceVerticle.java
+++ b/vertx/src/main/java/com/baledung/rest/RestServiceVerticle.java
@@ -14,28 +14,28 @@ public class RestServiceVerticle extends AbstractVerticle {
 
         Router router = Router.router(vertx);
         router.get("/api/baeldung/articles/article/:id")
-            .handler(this::getArticles);
+                .handler(this::getArticles);
 
         vertx.createHttpServer()
-            .requestHandler(router::accept)
-            .listen(config().getInteger("http.port", 8080), result -> {
-                if (result.succeeded()) {
-                    future.complete();
-                } else {
-                    future.fail(result.cause());
-                }
-            });
+                .requestHandler(router::accept)
+                .listen(config().getInteger("http.port", 8080), result -> {
+                    if (result.succeeded()) {
+                        future.complete();
+                    } else {
+                        future.fail(result.cause());
+                    }
+                });
     }
 
     private void getArticles(RoutingContext routingContext) {
         String articleId = routingContext.request()
-            .getParam("id");
+                .getParam("id");
         Article article = new Article(articleId, "This is an intro to vertx", "baeldung", "01-02-2017", 1578);
 
         routingContext.response()
-            .putHeader("content-type", "application/json")
-            .setStatusCode(200)
-            .end(Json.encodePrettily(article));
+                .putHeader("content-type", "application/json")
+                .setStatusCode(200)
+                .end(Json.encodePrettily(article));
     }
 
 }
diff --git a/vertx/src/test/java/com/baeldung/RestServiceVerticleTest.java b/vertx/src/test/java/com/baeldung/RestServiceVerticleTest.java
index 8eebe1396d..b5be0734f4 100644
--- a/vertx/src/test/java/com/baeldung/RestServiceVerticleTest.java
+++ b/vertx/src/test/java/com/baeldung/RestServiceVerticleTest.java
@@ -34,13 +34,13 @@ public class RestServiceVerticleTest {
         final Async async = testContext.async();
 
         vertx.createHttpClient()
-            .getNow(8080, "localhost", "/api/baeldung/articles/article/12345", response -> {
-                response.handler(responseBody -> {
-                    testContext.assertTrue(responseBody.toString()
-                        .contains("\"id\" : \"12345\""));
-                    async.complete();
+                .getNow(8080, "localhost", "/api/baeldung/articles/article/12345", response -> {
+                    response.handler(responseBody -> {
+                        testContext.assertTrue(responseBody.toString()
+                                .contains("\"id\" : \"12345\""));
+                        async.complete();
+                    });
                 });
-            });
     }
 
 }
diff --git a/vertx/src/test/java/com/baeldung/SimpleServerVerticleTest.java b/vertx/src/test/java/com/baeldung/SimpleServerVerticleTest.java
index 177f8d8435..189d2f6604 100644
--- a/vertx/src/test/java/com/baeldung/SimpleServerVerticleTest.java
+++ b/vertx/src/test/java/com/baeldung/SimpleServerVerticleTest.java
@@ -20,8 +20,8 @@ public class SimpleServerVerticleTest {
     public void setup(TestContext testContext) {
         vertx = Vertx.vertx();
 
-        vertx.deployVerticle(SimpleServerVerticle.class.getName(), 
-          testContext.asyncAssertSuccess());
+        vertx.deployVerticle(SimpleServerVerticle.class.getName(),
+                testContext.asyncAssertSuccess());
     }
 
     @After
@@ -34,13 +34,13 @@ public class SimpleServerVerticleTest {
         final Async async = testContext.async();
 
         vertx.createHttpClient()
-            .getNow(8080, "localhost", "/", response -> {
-                response.handler(responseBody -> {
-                    testContext.assertTrue(responseBody.toString()
-                        .contains("Welcome"));
-                    async.complete();
+                .getNow(8080, "localhost", "/", response -> {
+                    response.handler(responseBody -> {
+                        testContext.assertTrue(responseBody.toString()
+                                .contains("Welcome"));
+                        async.complete();
+                    });
                 });
-            });
     }
 
 }