docs: update service locator (#2963)

service-locator/src/main/java/com/iluwatar/servicelocator/InitContext.java

@@ -36,7 +36,7 @@ import lombok.extern.slf4j.Slf4j;
 public class InitContext {
 
   /**
-   * Perform the lookup based on the service name. The returned object will need to be casted into a
+   * Perform the lookup based on the service name. The returned object will need to be cast into a
    * {@link Service}
    *
    * @param serviceName a string

service-locator/src/main/java/com/iluwatar/servicelocator/Service.java

@@ -34,7 +34,7 @@ package com.iluwatar.servicelocator;
 public interface Service {
 
   /*
-   * The human readable name of the service
+   * The human-readable name of the service
    */
   String getName();
 

service-locator/src/main/java/com/iluwatar/servicelocator/ServiceLocator.java

@@ -47,9 +47,7 @@ public final class ServiceLocator {
    */
   public static Service getService(String serviceJndiName) {
     var serviceObj = serviceCache.getService(serviceJndiName);
-    if (serviceObj != null) {
-      return serviceObj;
-    } else {
+    if (serviceObj == null) {
       /*
        * If we are unable to retrieve anything from cache, then lookup the service and add it in the
        * cache map
@@ -59,7 +57,7 @@ public final class ServiceLocator {
       if (serviceObj != null) { // Only cache a service if it actually exists
         serviceCache.addService(serviceObj);
       }
-      return serviceObj;
     }
+    return serviceObj;
   }
 }