How do I implement a linked list in Java?

How do I implement a linked list in Java?

To implement a linked list in Java, you need to create a Node class and a LinkedList class. The Node class will hold the data and a reference to the next node.

Can you show me the code for the Node class?

Sure! Here's a simple Node class:

class Node {
    int data;
    Node next;

    Node(int data) {
        this.data = data;
        this.next = null;
    }
}

What about the LinkedList class?

The LinkedList class will manage the nodes. Here's a basic implementation:

class LinkedList {
    Node head;

    public void add(int data) {
        Node newNode = new Node(data);
        if (head == null) {
            head = newNode;
        } else {
            Node current = head;
            while (current.next != null) {
                current = current.next;
            }
            current.next = newNode;
        }
    }
}

How do I traverse the linked list?

You can traverse the linked list by starting from the head and moving to the next node until you reach the end. Here's a method to print all elements:

public void printList() {
    Node current = head;
    while (current != null) {
        System.out.print(current.data + " ");
        current = current.next;
    }
}