Java - 🧐 Checking Out if Empty with `isEmpty()`: Doubly Linked List 📖

Hey Dev.to folks! 👋

When dealing with a doubly linked list, there's an easy way to check if it's a full house or a lonely room.🥳 Here comes the isEmpty() method.

📘 Quick Doubly Linked List Refresher:

Before we dive in, let's recall our framework:

class Node {
    int data;
    Node next;
    Node prev;

    // Constructor: Crafting our node from scratch
    Node(int data) {
        this.data = data;
        this.next = null;
        this.prev = null;
    }
}

class DoublyLinkedList {
    Node head;
    Node tail;

    // Constructor: Setting the stage 
    DoublyLinkedList() {
        this.head = null;
        this.tail = null;
    }
}

Remember, each node in our doubly linked list has knowledge of both its previous and next neighbor. 🤝

🕵️‍♂️ Diving into isEmpty():

Here's the quick insight on how...:

public boolean isEmpty() {
    return head == null;  // If no head, no party!
}

Super straightforward, right? If there's no head node, then the list is empty!

🎈 Why isEmpty() is Your New BFF(I mean FOREVER!):

Ever tried inserting or deleting from a list? Knowing whether it’s populated can save you from situations you would not admit later on in life. Trying to work with non-existent nodes___? 🤷‍♂️

🎉 Wrapping Things Up:

The isEmpty() method: your first line of defense. It ensures you're not talking to yourself (though a rubber duck can help to catch thoughts 🦆 ), and trust me, that’s a great feature to have.

Cheers and happy coding! 🚀