In the Coordinates record example, the explicit latitude () method with a double return type is valid, but one with a String return type will not compile due to a type mismatch.

The technique that a developer can use to apply method parameters as carriers for return data is to accept parameters that are mutable and to mutate the passed-in objects’ state. These mutable ...

Thus, we might make the method return a string. To do this, we change the word “void” for the type of variable we want to return, and we add “return value ” at the end of the method.

Method and variable handles vs. Java reflection To truly understand MethodHandles and VarHandles —what they do and why they are useful—it’s helpful to know a few things about reflection in Java.