BAEL2489:Avoid check for null statements in Java (#6647)

* BAEL2489 - Avoid check for null statement in Java

* BAEL2489 Avoid check for null statement in Java

* BAEL2489 Avoid check for null statement in Java

* BAEL2489 Avoid check for null statement in Java

* BAEL2489 Avoid check for null statement in Java

* BAEL2489 Avoid check for null statement in Java - Removing unused pom changes

* BAEL2489 Avoid check for null statement in Java - Removing unused pom changes

* Delete pom.xml

Removing unused changes in core-java

* BAEL2489 Avoid check for null statement in Java - Removing unused pom changes

* BAEL2489 Avoid check for null statement in Java - adding ofnullable to Optional example

patterns/design-patterns-2/src/main/java/com/baeldung/nulls/UsingOptional.java

@@ -8,11 +8,7 @@ public class UsingOptional {
 
         String response = doSomething(processed);
 
-        if (response == null) {
-            return Optional.empty();
-        }
-
-        return Optional.of(response);
+        return Optional.ofNullable(response);
     }
 
     private String doSomething(boolean processed) {