Queue interface in Java and default interface

Question

I am reading about default interfaces in Java. I am say trying to implement a Queue interface but do not wish to write implementation of all the methods. I wonder how do I do that because the "Queue" and "Collections" interface do not have default methods in Java

Answer 1

One way is to extend an already implemented subclass and override methods of our choice.

For example, we can extend ArrayDeque and override peek() if we want to

class MyQueue<E> extends ArrayDeque<E> {
    @Override
    public E peek() {
        return null;
    }
}