When you implement an interface method (by overriding the interface’s method header), remember that all of the methods whose headers are declared in the interface are implicitly declared public.

Method references in Java are part of the broader set of features introduced and enhanced in Java 8 and beyond. They are a concise way to refer to methods of classes or objects.

Any Java developer who has interacted with a collection class would be familiar with methods such as add(), clear(), remove() and iterator(), all of which are defined in the Collection interface.