Your Perfect Assignment is Just a Click Away

Starting at $8.00 per Page

100% Original, Plagiarism Free, Customized to Your instructions!

glass
pen
clip
papers
heaphones

Insert & Delete Methods Java Coding Task

Insert & Delete Methods Java Coding Task

Question Description

I’m working on a java project and need guidance to help me understand better.

Insert & Delete Methods

public void insertNode(T insertItem){
       boolean found;
       DoubleLinkedListNode<T> current;//moving reference
       DoubleLinkedListNode<T> trailCurrent = null; //just before current
       // Set up node to be inserted
       DoubleLinkedListNode<T> newNode = new DoubleLinkedListNode<T>();
       newNode.info = insertItem;
       newNode.next = null;
       newNode.back = null;
       //if the list is empty, newNode is the only node
       if (first == null) {
           first = newNode;
           last = newNode;
           count++;
       }
       else {
           found = false;
           current = first;
           //search the list
           while (current != null && !found) {
               Comparable<T> temp = (Comparable<T>) current.info;
               if (temp.compareTo(insertItem) >= 0)
                   found = true;
               else {
                   trailCurrent = current;
                   current = current.next;
               }
           }
           //insert new node before first
           if (current == first) {
               first.back = newNode;
               newNode.next = first;
               first = newNode;
               count++;
           }
           else {
               //insert newNode between trailCurrent and current
               if (current != null) {
                   trailCurrent.next = newNode;
                   newNode.back = trailCurrent;
                   newNode.next = current;
                   current.back = newNode;
               }
               else {
                   //insert new node after last
                   trailCurrent.next = newNode;
                   newNode.back = trailCurrent;
                   last = newNode;
               }
               count++;
           }
       }
   }
    
   public void deleteNode(T deleteItem) {
       DoubleLinkedListNode<T> current; //moving reference
       DoubleLinkedListNode<T> trailCurrent;//just before current
       boolean found;
       if (first == null)
           System.err.println("Cannot delete from an empty list.");
       //if node to be deleted is the first node
       else if (first.info.equals(deleteItem)) {
           current = first;
           first = first.next;
           if (first != null)
               first.back = null;
           else
               last = null;
           count--;
       }
       else {
           found = false;
           current = first;
           //search the list
           while (current != null && !found) {
               Comparable<T> temp = (Comparable<T>) current.info;
               if (temp.compareTo(deleteItem) >= 0)
                   found = true;
               else
                   current = current.next;
           }
           if (current == null)
               System.out.println("The item to be deleted is not in the list.");
           else if (current.info.equals(deleteItem)) {
               trailCurrent = current.back;
               trailCurrent.next = current.next;
               if (current.next != null)
                   current.next.back = trailCurrent;
               if (current == last)
                   last = trailCurrent;
               count--;
           }
           else
               System.out.println("The item to be deleted is not in list.");
       }
   }


"Place your order now for a similar assignment and have exceptional work written by our team of experts, guaranteeing you A results."

Order Solution Now

Our Service Charter


1. Professional & Expert Writers: Eminence Papers only hires the best. Our writers are specially selected and recruited, after which they undergo further training to perfect their skills for specialization purposes. Moreover, our writers are holders of masters and Ph.D. degrees. They have impressive academic records, besides being native English speakers.

2. Top Quality Papers: Our customers are always guaranteed of papers that exceed their expectations. All our writers have +5 years of experience. This implies that all papers are written by individuals who are experts in their fields. In addition, the quality team reviews all the papers before sending them to the customers.

3. Plagiarism-Free Papers: All papers provided by Eminence Papers are written from scratch. Appropriate referencing and citation of key information are followed. Plagiarism checkers are used by the Quality assurance team and our editors just to double-check that there are no instances of plagiarism.

4. Timely Delivery: Time wasted is equivalent to a failed dedication and commitment. Eminence Papers are known for the timely delivery of any pending customer orders. Customers are well informed of the progress of their papers to ensure they keep track of what the writer is providing before the final draft is sent for grading.

5. Affordable Prices: Our prices are fairly structured to fit in all groups. Any customer willing to place their assignments with us can do so at very affordable prices. In addition, our customers enjoy regular discounts and bonuses.

6. 24/7 Customer Support: At Eminence Papers, we have put in place a team of experts who answer all customer inquiries promptly. The best part is the ever-availability of the team. Customers can make inquiries anytime.