Lookingfor help displaying GUI's

Question

I am trying to add buttons to my inventory program and everything complies but the screen comes up and is blank. Can someone point me in the right direction please?
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.*;
public class InventoryButtons extends JFrame
     private JTextField jtfTitle;
    private JTextField jtfItem;
    private JTextField jtfUnits;
    private JTextField jtfPrice;
    private JTextField jtfRestock;
    private JTextField jtfValue;
    private JTextField jtfValueAll;
     static int dispMov = 0;
          int i;
          double total = 0;
          final Movies[]DVDs = new Movies[4];
          for (i = 0; i<4; i++)
        for(int index = 0; index < DVDs.length; index++)
               DVDs[0] = new Movies("Raiders of the Lost Ark", "189", 15, 12.99, "PG-13");
               DVDs[1] = new Movies("Revenge of the Sith", "222", 4, 10.99, "R");
               DVDs[2] = new Movies("Toy Story", "325", 11, 15.95, "G");
               DVDs[3] = new Movies("Memento", "456", 30, 14.00, "R");
        JPanel jpLabels = new JPanel();
          jpLabels.setLayout(new GridLayout(8,1));
          jpLabels.add(new JLabel(" DVD Title:"));
          jpLabels.add(new JLabel(" Item #"));
          jpLabels.add(new JLabel(" Units in Stock:"));
          jpLabels.add(new JLabel(" Price:"));
          jpLabels.add(new JLabel(" Restocking Fee (5%):"));
          jpLabels.add(new JLabel(" Total Value of Inventory:"));
          jpLabels.add(new JLabel(" Value of All Inventory:"));
        JPanel jpTextFields = new JPanel();
          jpTextFields.setLayout(new GridLayout(8,1));
          jpTextFields.add(jtfTitle = new JFormattedTextField());
          jpTextFields.add(jtfItem = new JFormattedTextField());
          jpTextFields.add(jtfUnits = new JFormattedTextField());
          jpTextFields.add(jtfPrice = new JFormattedTextField());
          jpTextFields.add(jtfRestock = new JFormattedTextField());
          jpTextFields.add(jtfValue = new JFormattedTextField());
          jpTextFields.add(jtfValueAll = new JFormattedTextField());
        for(int j1=0; j1 < DVDs.length; ++j1)
            jtfTitle.setText(DVDs[j1].getDvdTitle());
            jtfItem.setText(DVDs[j1].getDvdItem());
            jtfUnits.setText(String.valueOf(DVDs[j1].getDvdStock()));
            jtfPrice.setText(String.valueOf(DVDs[j1].getDvdPrice()));
            jtfRestock.setText(String.valueOf(DVDs[j1].getRestockingFee()));
            jtfValue.setText(String.valueOf(DVDs[j1].inventoryValue()));
            jtfValueAll.setText(String.valueOf(DVDs[j1].CalculateTotalInventoryValue( DVDs)));
     public static void main(String args[])
               InventoryButtons inventorybuttons = new InventoryButtons();
               inventorybuttons.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
               inventorybuttons.setSize(1100,300);
               inventorybuttons.setVisible(true);
     class Inventory
           // instance fields
        private String dvdTitle;
        private String dvdItem;
        private double dvdStock;
        private double dvdPrice;
        //constructor to initialize DVD title, item, stock and price
        public Inventory(String title, String item, double stock, double price)
           dvdTitle = title;
           dvdItem = item;
           dvdStock = stock;
           dvdPrice = price;
        } // end class Inventory constructor
        // set DVD name
        public void setDvdTitle(String title)
           dvdTitle = title;
        } // end method setDvdTitle
        // return DVD name
        public String getDvdTitle()
           return dvdTitle;
        } // end method getDvdTitle
        // set item number
        public void setDvdItem(String item)
           dvdItem = item;
        } // end method setDvdItem
        // return item number
        public String getDvdItem()
           return dvdItem;
        } // end method getDvdItem
        // set number of units in stock
        public void setDvdStock(double stock)
           dvdStock = stock;
        } // end method setDvdStock
        // return number of units in stock
        public double getDvdStock()
           return dvdStock;
        } // end method getDvdStock
        // set price of each unit
        public void setDvdPrice (double price)
           dvdPrice = price;
        } // end method setDvdPrice
        // return price of each unit
        public double getDvdPrice()
           return dvdPrice;
        } // end method getDvdPrice
        // calculate inventory value
        public double inventoryValue()
           return dvdPrice * dvdStock;
        } // end method inventoryValue
         //method to calculate total value of the inventory in an array of products
     public Double CalculateTotalInventoryValue(Inventory[] DVDs)
       Double total = 0.0;
       for(int index = 0; index < DVDs.length; index++)
        Inventory inv = DVDs[index];
        total += inv.inventoryValue();
       return total;
          //sort method
     //method to sort products based on product name
     public Inventory[] SortInventory(Inventory[] DVDs)
       Inventory tmp;
       for (int i = 0; i < DVDs.length; i++)
        for (int j = i + 1; j < DVDs.length; j++)
         String s1 = DVDs.getDvdTitle();
     String s2 = DVDs[j].getDvdTitle();
     if( s1.compareTo(s2) > 0)
     tmp = DVDs[i];
     DVDs[i] = DVDs[j];
     DVDs[j] = tmp;
     return DVDs;
     } // end class Inventory
     class Movies extends Inventory
          //instance field
          private String dvdRating;//DVD Rating
          private double RestockingFee;
          //five argument constructor
          public Movies(String title, String item, double stock, double price, String rating)
          super( title,item,stock,price);
          setDvdRating( rating ); // validate and store DVD rating
          } // end five-argument Movie constructor
          private void setDvdRating(String rating)
               dvdRating = rating;
          } // end method setDvdRating
               // return DVD rating
               public String getDvdRating()
               return dvdRating;
               } // end method getDvdRating
               public void setRestockingFee(double Fee)
               RestockingFee = Fee;
               }//end method setRestockingFee
               public double getRestockingFee()
                    return super.getDvdPrice()*.05;
               }//end method restocking fee
          // calculate total inventory
               public double inventoryValue()
          return super.getDvdStock()*super.getDvdPrice() * 1.05;
                    // end class Movies

Answer 1

Why is all that code not in your constructor? It should be in the constructor. Or some method.
Anyway. You create a JFrame. You create a bunch of Panels. You add a bunch of stuff to the Panels. You never add the Panels to the frame.
Fix the first thing I talked about (put the code in the constructor at least) and then add the panels to the frame.
Edit: due to achieving binary zen this will probably be my last post for today. Good luck.