When == is used on an expression of type object, it’ll resolve to System.Object.ReferenceEquals. Equals is just a virtual method and behaves as such, so the overridden version will be used (which, for string type compares the contents).
Why do I need to override the equals and hashCode methods in Java?
How to determine equality for two JavaScript objects?
The theory (for the language lawyers and the mathematically inclined): equals() (javadoc) must define an equivalence relation (it must be reflexive, symmetric, and transitive). In addition, it must be consistent (if the objects are not modified, then it must keep returning the same value). Furthermore, o.equals(null) must always return false. hashCode() (javadoc) must also be … Read more
return true is only executed if the if condition is true. For all other cases you need the return false