/**
 * Exercise 4:
 * write a Java application to insert THREE(3) integers 8, 10, 66 using insertAtFront().
 * Print and observe the output.
 * note: the output should be 66,10,8
 *
 * @author MUHAMMAD AZRI BIN JASNI
 * @version 10 OCTOBER 2012
 */
import java.util.*;
public class exercise4
{
    public static void main(String [] args)
    {
        LinkedList list = new LinkedList();
        Scanner sc = new Scanner(System.in);
        int input;

        System.out.println("Enter the 3 integers[8,10,66] at the front.");
        for (int i=0;i<3;i++)
        {
            input = sc.nextInt();
            list.insertAtFront(input);
        }
        list.display();

        /* Exercise 5
         * Write the complete definition for method insertAtBack() and insert
         * another THREE (3) integers 68, 3, 1. Print and observe the output.
         * *Note: The output should be 66, 19, 8, 68, 3, 1*/
        System.out.println("Enter the 3 integers[68,3,1] at the back.");
        for (int i=0;i<3;i++)
        {
            input = sc.nextInt();
            list.insertAtBack(input);
        }
        list.display();

        /* Exercise 6
         * Write the complete definition for method removeFromFront() and remove a node.
         * Print and observe the output.
         *
         * *Note: The output should be 10, 8, 68, 3, 1*/
         System.out.println("Removing an element from the front...");
         list.removeFromFront();
         list.display();
        /* Exercise 7
         * Write the complete definition for method removeFromBack() and remove
         * TWO(2) nodes. Print and observe the output.
         * *Note: The output should be 10, 8, 68*/
         System.out.println("Removing 2 element from the back...");
         list.removeFromBack();
         list.display();
         list.removeFromBack();
         list.display();
        sc.close();
    }
}