Question

import java.util.LinkedList;
import java.util.ListIterator;

public class ProjectList
{
/** This is the main function for the program */
public static void main()
{
System.out.println("\n\tBegin ProjectList demo program");
  
// 1. TO DO: Describe your project (1 Pt)
System.out.println("Project: . . . . . . \n");

System.out.println("Create a LinkedList to store the tasks");
// 2. TO DO: Declare a LinkedList of String objects called "tasks" (1 Pt)
  
  
System.out.println("Add initial tasks into the list");
// 3. TO DO: Add initial list of four or more tasks (5 Pts)

  
  
  
  
  
System.out.println("\nDisplay Initial list: ");
printList(tasks);
  
System.out.println("Add a step to the front of the list");
// 4. TO DO: Add a task to the front of the list (2 Pts)

printList(tasks);
  
System.out.println("Create a ListIterator for the tasks");
// 5. TO DO: Declare a List iterator for the tasks (2 Pts)
  
  
System.out.println("\nIterate two or more steps forward and insert one or more tasks");
// 6. TO DO: Iterate two or more steps forward and insert one or more tasks (3 Pts)

  
  
  
printList(tasks);
  
System.out.println("Move forward one or more tasks and remove a task");
// 7. TO DO: Iterate down one or more tasks and remove a task (3 Pts)

  
printList(tasks);
  
System.out.println("Move back one or more tasks and add some tasks");
// 8. TO DO: Iterate back one or more tasks and add some tasks (3 Pts)

  
  
  
printList(tasks);
  
System.out.println("Add remaining task(s) to finish the project");
// 9. TO DO: Add at least one remaining task(s) to finish the project (3 Pts)

  
  
  
  
System.out.println("\nFinal list of elements:");
printList(tasks);   

System.out.println("\tEnd LinkedList demo program\n");
}

/**
* This method displays the elements in the LinkedList
* It declares a LinkedList iterator for traversal
* @param tasks - reference to the LinkedList to be displayed
*/
private static void printList(LinkedList<String> tasks)
{
int number = 1;
ListIterator iterator = tasks.listIterator();
while (iterator.hasNext())
System.out.printf("%3d - %s\n", number++, iterator.next().toString());
System.out.println();
}
}

Answer 1

import java.util.LinkedList;
import java.util.ListIterator;

public class ProjectList {

   /** This is the main function for the program */
   public static void main(String[] args)
   {
       System.out.println("\n\tBegin ProjectList demo program");
      
       // 1. Describe your project (1 Pt)
       System.out.println("Project: LinkedList demo program\n");
  
       System.out.println("Create a LinkedList to store the tasks");
       // 2. Declare a LinkedList of String objects called "tasks" (1 Pt)
       LinkedList<String> tasks = new LinkedList<String>();
      
       System.out.println("Add initial tasks into the list");
       // 3. Add initial list of four or more tasks (5 Pts)
       tasks.add("Task 1");
       tasks.add("Task 2");
       tasks.add("Task 3");
       tasks.add("Task 4");
      
      
       System.out.println("\nDisplay Initial list: ");
       printList(tasks);
      
       System.out.println("Add a step to the front of the list");
       // 4. Add a task to the front of the list (2 Pts)
       tasks.addFirst("Task 5");
       printList(tasks);
      
       System.out.println("Create a ListIterator for the tasks");
       // 5. Declare a List iterator for the tasks (2 Pts)
       ListIterator<String> iterator = tasks.listIterator();
      
       System.out.println("\nIterate two or more steps forward and insert one or more tasks");
       // 6. Iterate two or more steps forward and insert one or more tasks (3 Pts)
       iterator.next();
       iterator.next();
      
       iterator.add("Task 6");
      
       printList(tasks);
      
       System.out.println("Move forward one or more tasks and remove a task");
       // 7. Iterate down one or more tasks and remove a task (3 Pts)
       iterator.next();
       iterator.remove();
      
       printList(tasks);
      
       System.out.println("Move back one or more tasks and add some tasks");
       // 8. Iterate back one or more tasks and add some tasks (3 Pts)
       iterator.previous();
       iterator.add("Task 7");
       iterator.add("Task 8");
      
      
       printList(tasks);
      
       System.out.println("Add remaining task(s) to finish the project");
       // 9. Add at least one remaining task(s) to finish the project (3 Pts)
       tasks.add("Task 9");
      
      
       System.out.println("\nFinal list of elements:");
       printList(tasks);   
  
       System.out.println("\tEnd LinkedList demo program\n");
   }

   /**
   * This method displays the elements in the LinkedList
   * It declares a LinkedList iterator for traversal
   * @param tasks - reference to the LinkedList to be displayed
   */
   private static void printList(LinkedList<String> tasks)
   {
       int number = 1;
       ListIterator iterator = tasks.listIterator();
       while (iterator.hasNext())
       System.out.printf("%3d - %s\n", number++, iterator.next().toString());
       System.out.println();
   }

}

//end of program

Output: