LinkedListNode.java

import java.util.*;

public class LinkedListNode
{
	//local constants

	//local variables

	//BEGIN CODE

	public UserData userInfo = new UserData("no data","no data",0);
	public LinkedListNode link;

}//END LinkedListNode

UserData.java

public class UserData
{
    //local constants

    //local variables
    String firstName;
    String lastName;
    float userScore;


   /**********************************************************
    * Method Name    : Constructor
    * Author         : Chad Johnson
    * Date           : Mar 05, 2013
    * Course/Section : CSC112 - section number
    * Program Description: This method will initialize all the
    * data that the StudentDriver class will keep track of.
    *
    * BEGIN StudentDriver
    * END StudentDriver
    **********************************************************/

   public UserData(String inFirstName, String inLastName, float inUserScore)
   {
      //local constants

      //local variables

      //Declarations
      firstName = inFirstName;
      lastName = inLastName;
      userScore = inUserScore;

   } //end main method

  /**********************************************************
   * Method Name    : toString
   * Author         : Ryan Peters
   * Date           : Feb 11, 2013
   * Course/Section : CSC112 - section number
   * Program Description: This method will returns values to the main
   *
   * BEGIN toString
   *
   * END toString
    **********************************************************/

   public String toString()
   {
	  //local constants

      //local variables

	   return firstName +" "+ lastName +" "+ userScore+"\n";
   }

} //end Lab03

UserDriver.java

import java.util.*;

public class UserDriver
{
	/**********************************************************
	* Method Name    : Main
	* Author         : Chad Johnson
	* Date           : Feb 11, 2013
	* Course/Section : CSC112 - section number
	* Program Description: This method will take data from the
	* user, store it in its own data element(that being UserData)
	* and that will be added to a Linked List. The user will be
	* any part of the Linked List.
	*
	*
	* BEGIN main
	*    ud.menu();
	*    WHILE(option isn't quit)
	*       IF(option is addData)
	*          prompt user for which data
	*          add data to linked List and move pointer in list
	*       ELSEIF(option is display)
	*          IF(data has been entered)
	*             display allData until the linked list is null
	*          ELSE
	*             tell user no data was entered
	*          ENDIF
	*       ENDIF
	*       ud.menu();
	*	 ENDWHILE
	* END main
    **********************************************************/

    public static void main(String args[])
    {
		//local constants
		final String QUIT       = "-1";
		final String ADD_DATA   = "1";
		final String DISPLAY    = "2";
		final String DELETE     = "3";

		//local variables
		String firstName, lastName, option;
		float score;
		boolean dataEntered;
		LinkedListNode head = null, curr, prev;

		UserData userInfo = new UserData("no data2","no data2",0);
		UserDriver ud = new UserDriver();
		Library myLib = new Library();
		//BEGIN MAIN METHOD~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

		curr = head;
		dataEntered = false;
		ud.menu();
		option = Keyboard.readString();
		myLib.clrscr();
		while(!option.equalsIgnoreCase(QUIT))
		{
			if(option.equalsIgnoreCase(ADD_DATA))
			{
				//prompt user for info
		   	    System.out.print("                             Enter First Name: ");
		   	    firstName = Keyboard.readString();
		   	    System.out.print("                             Enter Last Name: ");
		   	    lastName = Keyboard.readString();
		   	    System.out.print("                             Enter User Score: ");
		   	    score = Keyboard.readFloat();

		   	    //gets info from user, puts it into data class, and points to next node
		   	    userInfo = new UserData(firstName, lastName, score);
		   	    curr.userInfo = userInfo;
		   	    prev = curr;
   	            curr = curr.link;
   	            dataEntered = true;
			}
			else if(option.equalsIgnoreCase(DISPLAY))
			{
				//checks if info has been entered yet
				if(dataEntered == true)
				{
					curr = head;
					while(curr != null)
					{
					    System.out.println("                             User Info: " + curr.userInfo);
					    curr = curr.link;
					}//end while
				}
				else
				{
					System.out.println("                             No Data Entered");
				}//end if
			}//end if
			ud.menu();
		    option = Keyboard.readString();
		}//end while
   } //end main method

   public void menu()
   {
	   System.out.println("                             [1] Enter UserData");
   	   System.out.println("                             [2] Display UserData");
   	   System.out.println("                             [3] Delete UserData");
   	   System.out.println("                             [-1] Quit");
   	   System.out.print(  "                             User Input: ");
   }//end menu method
} //end UserDriver