In Java, nested classes are categorized as either static member classes or ... as local classes because (as with local variables) they are local to the methods in which they are declared.

import static java.lang.Math.cos; // Import the cos() static method only. Once you’ve imported them, you can specify static members without having to prefix them with their type names.

The static keyword often confuses junior Java developers. A static variable is one that is not attached to an instance, and a static method is one that does not require an instance to be invoked.

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 ...