Java 11 migration: ambassador async-method-invocation balking bridge builder (#1076)

* Moves ambassador pattern to java 11

* Moves async-method-invocation pattern  to java 11

* Moves balking pattern  to java 11

* Moves bridge pattern  to java 11

* Moves builder pattern  to java 11

ambassador/src/test/java/com/iluwatar/ambassador/AppTest.java

@@ -28,10 +28,10 @@ import org.junit.jupiter.api.Test;
 /**
  * Application test
  */
-public class AppTest {
+class AppTest {
 
   @Test
-  public void test() {
+  void test() {
     App.main(new String[]{});
   }
 }

ambassador/src/test/java/com/iluwatar/ambassador/ClientTest.java

@@ -30,13 +30,12 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 /**
  * Test for {@link Client}
  */
-public class ClientTest {
+class ClientTest {
 
   @Test
-  public void test() {
-
+  void test() {
     Client client = new Client();
-    long result = client.useService(10);
+    var result = client.useService(10);
 
     assertTrue(result == 100 || result == RemoteService.FAILURE);
   }

ambassador/src/test/java/com/iluwatar/ambassador/RemoteServiceTest.java

@@ -23,34 +23,31 @@
 
 package com.iluwatar.ambassador;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
 import com.iluwatar.ambassador.util.RandomProvider;
 import org.junit.jupiter.api.Test;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertTrue;
-
 /**
  * Test for {@link RemoteService}
  */
-public class RemoteServiceTest {
+class RemoteServiceTest {
 
   @Test
-  public void testFailedCall() {
-    RemoteService remoteService = new RemoteService(
-        new StaticRandomProvider(0.21));
-    long result = remoteService.doRemoteFunction(10);
+  void testFailedCall() {
+    var remoteService = new RemoteService(new StaticRandomProvider(0.21));
+    var result = remoteService.doRemoteFunction(10);
     assertEquals(RemoteServiceInterface.FAILURE, result);
   }
 
   @Test
-  public void testSuccessfulCall() {
-    RemoteService remoteService = new RemoteService(
-        new StaticRandomProvider(0.2));
-    long result = remoteService.doRemoteFunction(10);
+  void testSuccessfulCall() {
+    var remoteService = new RemoteService(new StaticRandomProvider(0.2));
+    var result = remoteService.doRemoteFunction(10);
     assertEquals(100, result);
   }
 
-  private class StaticRandomProvider implements RandomProvider {
+  private static class StaticRandomProvider implements RandomProvider {
     private double value;
 
     StaticRandomProvider(double value) {

ambassador/src/test/java/com/iluwatar/ambassador/ServiceAmbassadorTest.java

@@ -30,10 +30,10 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 /**
  * Test for {@link ServiceAmbassador}
  */
-public class ServiceAmbassadorTest {
+class ServiceAmbassadorTest {
 
   @Test
-  public void test() {
+  void test() {
     long result = new ServiceAmbassador().doRemoteFunction(10);
     assertTrue(result == 100 || result == RemoteServiceInterface.FAILURE);
   }