Help! Program runs but dies up halfway through!

Question

HELP!
Help! My program runs, but dies after it starts running.
I am attaching my assignment and my programs. This is due tomorrow night and I am trying to get it done today since I have other assignments to do. Any help anyone can offer would be great.
The program compiles, it succesffuly calls the other parts, but the applet blows up after it runs the first dialog box.
Assignment*********************************************************
Wie's Tea Shop asks you to write an Inventory control program to keep track of the boxes of tea they serve to customers. The program will allow the user to enter the name of the tea, the number of boxes on hand, and the number of boxes used during a one-day period. The output will display the input data and the number of boxes remaining. Use dialog boxes for program input and output. The program names are InventoryControl, InventorySold, and UseInventorySold. The InventorySold class extends InventoryControl and prompts for the quantity of tea boxes sold.
//This is InventoryControl and it part 1 of the program
import javax.swing.*;
import javax.swing.JOptionPane;
public class InventoryControl
     public static String teaType;
     public InventoryControl()
          teaType = JOptionPane.showInputDialog(null, "Please Enter the type of Tea used today:", "Tea Type");
     public static String getTeaType()
          return teaType;
//This is InventorySold and is Part 2 of the program
import javax.swing.*;
import javax.swing.JOptionPane;
public class InventorySold extends InventoryControl
     public static String teaSold;
//     public static int TSN;
     public InventorySold()
          //teaSold = JOptionPane.showInputDialog(null, "Enter the number of " +     teaType + " boxes sold today");
          teaSold = JOptionPane.showInputDialog(null, "Enter the number of BLAH boxes sold today");
     //     TSN = Integer.parseInt(teaSold);
     public static String getTeaSold()
          return teaSold;
//This is UseInventorySold and is Part 3 of the program
import javax.swing.JOptionPane;
import java.lang.*;
import java.util.*;
public class UseInventorySold extends InventoryControl
     //String teaOnHand;
     public static void main(String [] args)
          String teaOnHand;
          JOptionPane.showMessageDialog(null, "Welcome to Wei's Tea Shop" + "\nTea Inventory Program", "Wei's Tea Shop", JOptionPane.INFORMATION_MESSAGE);
          InventoryControl TT = new InventoryControl();
          InventorySold TS = new InventorySold();
     //     String teaType = getTeaType();
     //     int teaSold = getTeaSold();
          teaOnHand = JOptionPane.showInputDialog(null, "Enter the number of " TT "boxes currently in stock"); int TeaOHN = Integer.parseInt(teaOnHand);
          JOptionPane.showMessageDialog(null,"Today you used " + TS + "boxes of " + TT + "." + "\nThere are currently " + TeaOHN + " boxes of " + TT + " left", "Wei's Tea Shop", JOptionPane.INFORMATION_MESSAGE);
          //System.exit(0);

Answer 1

This is what it does....
after the user clicks okay on the first user input dialog box the the applet window says "Start: applet not initialized" at the bottom and the IDE debugger says ...
java.lang.ClassCastException
at sun.applet.AppletPanel.createApplet(AppletPanel.java:617)
at sun.applet.AppletPanel.runLoader(AppletPanel.java:546)
at sun.applet.AppletPanel.run(AppletPanel.java:298)
at java.lang.Thread.run(Thread.java:534)