Method Chaining

Question

Hi all,
I have these method chaining:
boolean b = Services.getInstance().getEntitleReferenceService().getUser(username) != null;
As I understood, I have to follow the method chain from right to left, right?
Services.getInstance()> returns an object of type: Services
On the Services object, I call the method: getEntitleReferenceService()
this method returns an object of type: EntitlementsReferenceService which is object of type interface: EntitlementsReferenceService
The only class that implements that interface is: RemoteEntitleReferenceService.java
In RemoteEntitleReferenceService.java, I have the method: getUser(String userID)
The point is that the method: getUser() does NOT return boolean as expected!
This is the method signature:
public User getUser(final String userId){}
I have this part of code in Intellij and it does not show an error as it usually does when these kind of error happens.
Does anybody has any idea that where am I making a mistake? Any help is greatly appreciated.

Answer 1

The point is that the method: getUser() does NOT return boolean as expected! Nobody expects it to. It'll return a reference, which will be evaluated against null, and the reult of that gets assigned to the boolean.