Static Methods Interface Interview Question| Java 8 features |static methods in interface |okayjav

Static Methods Interface Interview Question| Java 8 features |static methods in interface |okayjava
Static Methods in Interface
Q. What is static method in java interface ?
static method is a non abstract method (function with body)
Its declared using ‘static' keyword
we cannot override static methods

Q. What is the purpose of introducing static methods in java interface ?
Java interface static methods are good for providing utility methods, for example null check, collection sorting etc.
Java interface static method helps us in providing security by not allowing implementation classes to override them.
We can use java interface static methods to remove utility classes

Q. What will happen if I override static method ?
or
Q. How can you prove that you can not override interface static method ?
Try to add @Override annotation to the method,
it will result in compiler time error.

Q. Is it possible to have multiple static methods in an interface?
Yes,
public interface DriveInterface {
static void driveBike() {
System.out.println(“Riding a bike.");
}
static void driveCar() {
System.out.println(“Driving a car...");
}
}

Q. Can you explain static methods Inheritance in java interface ?
Static methods in interfaces are never inherited.

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