What are default methods in interfaces?

What are default methods in interfaces?

Default methods in interfaces allow you to provide a default implementation for a method in an interface. This means that classes implementing the interface can use the default method without needing to override it.

Can you give me an example of how to use default methods?

Sure! Here's a simple example:

interface MyInterface {
    default void display() {
        System.out.println("Default display method");
    }
}

class MyClass implements MyInterface {}

public class Main {
    public static void main(String[] args) {
        MyClass obj = new MyClass();
        obj.display(); // Calls the default method
    }
}

What happens if a class overrides a default method?

If a class overrides a default method, the overridden method will be called instead of the default implementation when invoked on an instance of that class.

Are there any limitations to using default methods?

Yes, default methods cannot be static or private, and they cannot throw checked exceptions unless the interface itself declares them.