Why are Java constants static and final? 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 ...

Can only have final static variables. An interface can never ... Only functional interfaces can use the lambda feature in Java. Abstract classes with only one abstract method cannot use lambdas.

Along with nesting, Java uses packages to resolve same-name issues in top-level reference types. Using static imports also simplifies access to the static members in packaged top-level reference ...

It is often safe to use int for the majority of your whole numbers. If you have some familiarity with variables in Java, you might ... (instance variables vs static variables).

I don't suggest you use static variables unless the thing being used ... [1] The data may be a value type (in java the only ones are primitives) which mean the entirety of the value is stored ...