Step by Step solution about How to resolve the algorithm Doubly-linked list/Element definition step by step in the Java programming language

The provided Java code defines a generic Node class that can be used to create doubly linked lists. Here's a detailed explanation of the code:

1. Generic Type:

   • The Node class is declared as a generic class, meaning it can store elements of any type T. This allows you to create nodes with different types of data.

2. Instance Variables:

   • The Node class has three instance variables:
     • element: This variable stores the actual data (of type T) held by the node.
     • next: This variable points to the next node in the doubly linked list. If there's no next node, it's set to null.
     • prev: This variable points to the previous node in the doubly linked list. If there's no previous node, it's set to null.

3. Constructors:

   • The class has two constructors:

     • Default Constructor: A default constructor that initializes all instance variables to null. This constructor is used when creating a new node without specifying any specific data or next/previous nodes.

     • Parameterized Constructor: A parameterized constructor that takes three parameters:

       • n: The next node in the list (or null if there's no next node).
       • p: The previous node in the list (or null if there's no previous node).
       • elem: The data element to store in the node.

4. Setter Methods:

   • The class provides several setter methods to modify the instance variables:
     • setNext(Node<T> n): Sets the next variable to the specified node n.
     • setElem(T elem): Sets the element variable to the specified data element elem.
     • setPrev(Node<T> p): Sets the prev variable to the specified node p.

5. Getter Methods:

   • The class also provides getter methods to retrieve the instance variables:
     • getNext(): Returns the next node in the list.
     • getElem(): Returns the data element stored in the node.
     • getPrev(): Returns the previous node in the list.

6. Usage:

   • This Node class can be used to create doubly linked lists. You can create nodes, set their data and next/previous pointers, and then link them together to form a list. Doubly linked lists allow for efficient traversal and modification operations in both directions.

public class Node<T> {
   private T element;
   private Node<T> next, prev;

   public Node<T>(){
      next = prev = element = null;
   }

   public Node<T>(Node<T> n, Node<T> p, T elem){
      next = n;
      prev = p;
      element = elem;
   }

   public void setNext(Node<T> n){
      next = n;
   }

   public Node<T> getNext(){
      return next;
   }

   public void setElem(T elem){
      element = elem;
   }

   public T getElem(){
      return element;
   }

   public void setNext(Node<T> n){
      next = n;
   }

   public Node<T> setPrev(Node<T> p){
      prev = p;
   }

   public getPrev(){
      return prev;
   }
}