Help problems with gui

Question

import java.awt.*;
import java.awt.event.*;
import java.text.*;
import javax.swing.*;
public class TheBEST extends Frame implements ItemListener
TextField AmmountLabel;
Label lb1,lb2,lb3,lb4,lb5;
Label tb6,tb7;
Label td8,td9,td10,td11,td12;
Label ct1;
Label ct2;
Label ct3;
Panel p1,p2,p3,p4,p5,p6,p7,p8,p9;
private Checkbox  StirJcheck,AbcJcheck,OysterJcheck,OldJcheck,ThaiJcheck;
private double PackagePric = 58.00;
private final double StirFriedCheck=2.00;
private final double AbcMango=3.00;
private final double OystersMombasa=5.50;
private final double Oldfashioned=2.50;
private final double Thaihot=4.50;
public static void main(String[]args){
TheBEST f=new TheBEST();
f.setSize(400,200);
f.setTitle("Restaurant");
f.setVisible(true);
public TheBEST()
Font fV = new Font("Verdana", Font.BOLD,25);
Font fA = new Font("Ariel",Font.BOLD+Font.ITALIC,13);
setBackground(Color.pink);
lb1=new Label("SHAZALEE BISTRO");
lb1.setFont(fV);
lb1.setForeground(new Color(255,0,230));
lb1.setBackground(Color.pink);
lb2=new Label("Special Package For Today !!");
lb2.setFont(fA);
lb3=new Label("Tomyam : (Chicken+Meat+Crab+Fish)");
lb3.setBackground(Color.orange);
lb3.setForeground(Color.red);
lb3.setFont(fA);
lb4=new Label("Salad Relish with Thousand Island");
lb4.setBackground(Color.orange);
lb4.setForeground(Color.red);
lb4.setFont(fA);
lb5=new Label("Thai Spicy Tamarind Prawn");
lb5.setBackground(Color.orange);
lb5.setForeground(Color.red);
lb5.setFont(fA);
tb6 =new Label(" << Additional Order:  >>");
tb6.setFont(fA);
tb7 =new Label("Number of person : ");
   tb7.setFont(fA);
   ct1 =new Label("$0.00       ");
   ct2 =new Label("$0.00       ");
   ct3=new Label("58.00");
   AmmountLabel = new TextField(4);
p1.setLayout(new BorderLayout());
p1.add("NORTH",lb1);
p1.add("CENTER",p2);
p1.add("SOUTH",p8);
/*p1.add(lb2);
p1.add(lb3);
p1.add(lb4);
p1.add(lb5);
p1.add(tb6);
/*setLayout(new BorderLayout());
add("NORTH",p1);
add("CENTER",p2);
add("SOUTH",p3);
p2.setLayout(new BorderLayout());
p2.add("NORTH",p3);
p2.add("CENTER",p5);
p2.add(tb7);
p2.add(AmmountLabel);
   p2.setBackground(Color.pink);
setLayout(new FlowLayout());
add(p2);
StirJcheck = new Checkbox("Stir Fried Wide Rice : RM 2.00 per person",false);
AbcJcheck = new Checkbox("ABC plus Mango Ice Cream with Pistachios : RM 3.00 per person",false);
OysterJcheck = new Checkbox("Oysters Mombasa : Baked with Garlic Butter:RM 5.00 per person" ,false);
OldJcheck= new Checkbox("Old Fashioned Banana Pudding : RM 2.50 per person",false);
   ThaiJcheck= new Checkbox("Thai Hot and Sour Shrimp Soup : RM 4.50 per person",false);
p3.setLayout(new BorderLayout());
p3.add("NORTH",lb2);
p3.add("CENTER",p4);
p3.add("NORTH",tb6);
p3.setForeground(Color.red);
p3.setFont(fA);
p3.add(StirJcheck);
p3.add(AbcJcheck );
p3.add(OysterJcheck);
p3.add(OldJcheck);
p3.add(ThaiJcheck);
/*setLayout(new BorderLayout(20,10));
add(p3);
td8 = new Label(" ** PRICE ** ");
td8.setBackground(Color.gray);
td9 = new Label("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
td10 = new Label("PACKAGE : ");
td11 = new Label("ADDITIONAL ORDER :");
td12 = new Label(" TOTAL PRICE : ");
p4.setLayout(new GridLayout(3,0,0,10));
p4.add(lb3);
p4.add(lb4);
p4.add(lb5);
p4.setBackground(Color.yellow);
p4.setFont(fA);
p4.add(td8);
p4.add(td9);
p4.add(td10);
p4.add(ct3);
p4.add(td11);
   p4.add(ct1);
p4.add(td12);
p4.add(ct2);
p4.setBackground(Color.GRAY);
/*setLayout(new FlowLayout(FlowLayout.LEFT,0,20));
add(p4);
p5.setLayout(new BorderLayout());
p5.add("NORTH",p6);
p5.add("CENTER",p7);
p6.setLayout(new FlowLayout());
p6.add(tb7);
p6.add(AmmountLabel);
p7.setLayout(new GridLayout(5,0,0,0));
p7.add(StirJcheck);
p7.add(AbcJcheck);
p7.add(OysterJcheck);
p7.add(OldJcheck);
p7.add(ThaiJcheck);
p8.setLayout(new BorderLayout());
p8.add("NORTH",td8);
p8.add("CENTER",p9);
p9.setLayout(new GridLayout());
p9.add(td9);
p9.add(td10);
p9.add(td11);
p9.add(td12);
StirJcheck.addItemListener(this);
AbcJcheck.addItemListener(this);
OysterJcheck.addItemListener(this);
OldJcheck.addItemListener(this);
ThaiJcheck.addItemListener(this);
public void itemStateChanged(ItemEvent event) {
  double price =0.00;
double total=PackagePric + price;
NumberFormat nf = NumberFormat.getCurrencyInstance();
int addAmount = Integer.parseInt(AmmountLabel.getText());
  if (StirJcheck.getState()) {
  price+= StirFriedCheck * addAmount;
  if (AbcJcheck.getState()) {
  price+= AbcMango* addAmount;
   if (OysterJcheck.getState()) {
  price+= OystersMombasa * addAmount;
  if (OldJcheck.getState()) {
  price+= Oldfashioned * addAmount;
  if (ThaiJcheck.getState()) {
  price+= Thaihot * addAmount;
   ct1.setText(nf.format(price));
   ct2.setText(nf.format(total));
   ct3.setText(nf.format(PackagePric));
}I get a runtime error what should i do ?

Answer 1

[url http://forum.java.sun.com/thread.jspa?threadID=770922&tstart=0]Crosspost.