Program Assignment 6

package prgAssignment;

public class GradClass
{
	private GradNode head;

	public GradClass()
	{
		head = new GradNode(0);
	}

	public boolean isEmpty()
	{
		if (head==null)
			return true;
		else
			return false;
	}

	public void printList()
	{
		GradNode trav = head;
		while (trav!=null)
		{
			trav.displayNode();
			trav = trav.next;
		}
	}

	public void delete(Object newData)
	{
		GradNode previous,current;
		GradNode temp = new GradNode(newData);
		boolean found = false;
		current = head;
		previous = null;
		String key = (String) newData;
		while (!found&& current !=null)
		{
			String firstValue = (String) current.data;
			if ((key).compareTo(firstValue)==0)
				found = true;
			else {
				previous = current;
			current = current.next;
				 }
		}
		temp.next = current;
		if (previous==null)
			head = temp;
		else
			previous.next = current.next;
	}

	public void insertInOrder(Object newData)
	{
		GradNode previous,current;
		GradNode temp = new GradNode(newData);
		boolean found = false;
		current = head;
		previous = null;
		String key = (String) newData;

		while(!found && current!=null)
		{
			String firstValue = (String) current.data;
			if ((key).compareTo(firstValue)<0)
				found = true;
			else
			{
				previous = current;
				current = current.next;
			}


		}
		temp.next = current;
		if (previous==null)
			head = temp;
		else
			previous.next = temp;
			}

	public Object getFirst()
	{
		return head.data;
	}

	public void add(Object newData)
	{
		GradNode temp = new GradNode(newData);
		if (head==null)
			head = temp;
		else {
			temp.next = head;
			head = temp;}

	}

	public boolean search(Object newData)
	{
		GradNode trav = head;
		boolean found = false;
		while (trav!=null&&found==false)
		{
			if(trav.data.equals(newData))
				found = true;
			trav = trav.next;
		}
		return found;
	}
}
package prgAssignment;

public class GradNode
{
	public Object data;
	public GradNode next;

	public GradNode(Object newData)
	{
		data = newData;
		next = null;
	}

	public void displayNode()
	{
		System.out.print(data + "->");
	}
}
package prgAssignment;

import java.io.FileReader;
import java.io.IOException;
import java.util.Scanner;

public class GradDemo
{
	public static void main ( String [ ] args) throws IOException
	{
		GradClass cookies = new GradClass();
		Scanner scnr = new Scanner (System.in);
		GradClass Scharff = new GradClass();
		GradClass Chiou = new GradClass();

		while (!false)
		{
			System.out.println("Enter a name to Add Print Delete or Search");

			String a = scnr.next();
			String b = scnr.next();

			String emptyString = scnr.nextLine();

			if(a.equals("Add"))
			{
				System.out.print("What is this student's major");
				String major = scnr.next();
				if (major.equals("CS"))
					Scharff.add(b);
				else if (major.equals("IS"))
					Chiou.add(b);
				else
					System.out.println("That student is not in the Seidenberg School of Information Systems");
			}

			if(a.equals("Print"))
			{
				if (b.equals("Scharff"))
				Scharff.printList();
				else if (b.equals("Chiou"))
					Chiou.printList();
				else
					System.out.println("Does not exist");
			}

			if (a.equals("Search"))
			{
				if (Scharff.search(b))
					System.out.println("Student's advisor is Scharff");
				else if (Chiou.search(b))
					System.out.println("Student's advisor is Chiou");
				else
					System.out.println("Does not exist");
			}

			if (a.equals("Delete"))
			{
				if (Scharff.search(b))
					Scharff.delete(b);
				else if(Chiou.search(b))
					Chiou.delete(b);
				else
					System.out.println("Does not exist");
			}
		}
	}

}

Enter a name to Add Print Delete or Search
Add Kevin
What is this student's majorCS
Enter a name to Add Print Delete or Search
Add Devin
What is this student's majorCS
Enter a name to Add Print Delete or Search
Add Devon
What is this student's majorIS
Enter a name to Add Print Delete or Search
Add Aleya
What is this student's majorCS
Enter a name to Add Print Delete or Search
Add Patrick
What is this student's majorCS
Enter a name to Add Print Delete or Search
Add Zach
What is this student's majorIS
Enter a name to Add Print Delete or Search
Add Scott
What is this student's majorCS
Enter a name to Add Print Delete or Search
Add Kenny
What is this student's majorIS
Enter a name to Add Print Delete or Search
Add Josh
What is this student's majorIS
Enter a name to Add Print Delete or Search
Add Ty
What is this student's majorCS
Enter a name to Add Print Delete or Search
Print Scharff
Ty->
Scott->
Patrick->
Aleya->
Devin->
Kevin->
0->
Enter a name to Add Print Delete or Search
Search
Ty
System.out.println("Student's advisor is Scharff");
Enter a name to Add Print Delete or Search
Delete Kevin
Enter a name to Add Print Delete or Search
Print Scharff
Ty->
Scott->
Patrick->
Aleya->
Devin->
0->
Enter a name to Add Print Delete or Search

PART B---------------------------------------------------------------------------------------------------------------------