The “traditional ways” that a non-constructor method returns a value can both be specified in the method signature.

Before calling a method, it must be defined within the context of a class. A method definition consists of the following components: – Access modifier: Determines the visibility of the method, e.g., ...

but should not be the optional Declare a method to return Optional. When the clients will have to perform special processing if no result is returned. Never return an optional of a boxed primitive ...