Small refactoring

src/main/java/grpchelloserver/GreetingServiceClient.java

 package grpchelloserver;
 
 import com.example.grpc.GreetingServiceGrpc;
+import com.example.grpc.GreetingServiceGrpc.*;
 import com.example.grpc.GreetingServiceOuterClass.*;
 import io.grpc.ManagedChannel;
 import io.grpc.ManagedChannelBuilder;
@@ -36,7 +37,7 @@ public class GreetingServiceClient {
         final ManagedChannel channel = ManagedChannelBuilder.forTarget("localhost:8080").usePlaintext(true).build();
 
         //creating a blocking stub on the channel
-        GreetingServiceGrpc.GreetingServiceBlockingStub stub = GreetingServiceGrpc.newBlockingStub(channel);
+        GreetingServiceBlockingStub stub = GreetingServiceGrpc.newBlockingStub(channel);
 
         //creating the HelloResponse object which will be provided as input to the RPC method
         HelloRequest request = HelloRequest.newBuilder().setName("Pippo").build();
@@ -59,7 +60,7 @@ public class GreetingServiceClient {
         final ManagedChannel channel = ManagedChannelBuilder.forTarget("localhost:8080").usePlaintext(true).build();
 
         //creating an asynchronous stub on the channel
-        GreetingServiceGrpc.GreetingServiceStub stub = GreetingServiceGrpc.newStub(channel);
+        GreetingServiceStub stub = GreetingServiceGrpc.newStub(channel);
 
         //creating the HelloResponse object which will be provided as input to the RPC method
         HelloRequest request = HelloRequest.newBuilder().setName("Pippo").build();