The reason why global constants in Java use the static and final keywords is because final ensures a variable cannot change, while static ensures only one copy of the constant variable is placed in ...

Java 8 introduced interface-based static methods because it’s often convenient to associate utility methods with interfaces instead of associating them with utility classes.

Syntactically, you call these methods instance methods because they are not static; but the important distinction concerns why I didn’t declare them as static.