You’ll also learn how the interface has evolved in Java 8, with the addition of default and static methods, and in Java 9 with the new private methods.

* INTERFACE Java interview questions ** 1. What is an interface? 2. What are Default methods in interface? 3. What are Static methods in interface ?. 4. What are Sealed interfaces (Java 15+)? 5 ...

Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs.

There is a reason why Java method modifiers exist. If you call public methods internally and don't understand why, your developers could face major class issues.