Core Java: Static interface methods belong to the interface, not implementing classes

A static method on an interface is called only through the interface's own name; it is never inherited by implementing classes the way a default method is.

Code

interface MathOps {
    static int square(int x) { return x * x; }
    default int cube(int x) { return x * x * x; }
}
class Impl implements MathOps {}
System.out.println("Static via interface: " + MathOps.square(5));
System.out.println("Default via instance: " + new Impl().cube(3));

Output

Static via interface: 25
Default via instance: 27