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/main/java/com/iluwatar/ambassador/Client.java

@@ -35,7 +35,7 @@ public class Client {
   private final ServiceAmbassador serviceAmbassador = new ServiceAmbassador();
 
   long useService(int value) {
-    long result = serviceAmbassador.doRemoteFunction(value);
+    var result = serviceAmbassador.doRemoteFunction(value);
     LOGGER.info("Service result: " + result);
     return result;
   }

ambassador/src/main/java/com/iluwatar/ambassador/RemoteService.java

@@ -33,7 +33,7 @@ import org.slf4j.LoggerFactory;
  * A remote legacy application represented by a Singleton implementation.
  */
 public class RemoteService implements RemoteServiceInterface {
-  static final int THRESHOLD = 200;
+  private static final int THRESHOLD = 200;
   private static final Logger LOGGER = LoggerFactory.getLogger(RemoteService.class);
   private static RemoteService service = null;
   private final RandomProvider randomProvider;
@@ -50,7 +50,7 @@ public class RemoteService implements RemoteServiceInterface {
   }
 
   /**
-   * This constuctor is used for testing purposes only.
+   * This constructor is used for testing purposes only.
    */
   RemoteService(RandomProvider randomProvider) {
     this.randomProvider = randomProvider;

ambassador/src/main/java/com/iluwatar/ambassador/ServiceAmbassador.java

@@ -48,21 +48,19 @@ public class ServiceAmbassador implements RemoteServiceInterface {
   }
 
   private long checkLatency(int value) {
-    long startTime = System.currentTimeMillis();
-    long result = RemoteService.getRemoteService().doRemoteFunction(value);
-    long timeTaken = System.currentTimeMillis() - startTime;
+    var startTime = System.currentTimeMillis();
+    var result = RemoteService.getRemoteService().doRemoteFunction(value);
+    var timeTaken = System.currentTimeMillis() - startTime;
 
     LOGGER.info("Time taken (ms): " + timeTaken);
     return result;
   }
 
   private long safeCall(int value) {
-
-    int retries = 0;
-    long result = FAILURE;
+    var retries = 0;
+    var result = (long) FAILURE;
 
     for (int i = 0; i < RETRIES; i++) {
-
       if (retries >= RETRIES) {
         return FAILURE;
       }