Class, interface, or emun expected.

Question

When I compile to code I get 60 "class, interface, or emun expected errors. I know that this error usual means that there is a bracket out of place or missing. I went through and add line comments that link the opening and closing brackets together. Can anyone take a look and let me know what I am missing. Thanks.
{code}
// Inventory4.java
// Program will track total inventory items in stock.
import java.io.*;
import javax.swing.JFrame;
public class Inventory4
{//1
public class Item
{//2
private double unitPrice;
private double quantityStock;
private double inventoryValue;
private double totalInventory;
private int itemNumber;
private String itemName;
/** Create a new instance of Item Name */
public Item(double UnitPrice,double QuantityStock,int      ItemNumber,String ItemName)
{//3
itemName = ItemName;
itemNumber = itemNumber;
unitPrice = UnitPrice;
quantityStock = QuantityStock;
}//3
public void setItemName(String ItemName)
{//4
itemName = ItemName;
}//4
public void setItemNumber(int ItemNumber)
{//5
itemNumber = ItemNumber;
}//5
public void setUnitPrice(String InventoryHardware)
{//6
inventoryHardware=InventoryHardware;
}//6
public void setUnitPrice(double UnitPrice)
{//7
unitPrice = UnitPrice;
}//7
public void setQuantityStock(double QuantityStock)
{//8
quantityStock = QuantityStock;
}//8
public String getItemName()
{//9
return itemName;
}//9
public int getItemNumber()
{//10
return itemNumber;
}//10
                    public String getInvetoryHardware()
{//11
                    return inventoryHardware;
}//11
public double getUnitPrice()
{//12
return unitPrice;
}//12
public double getQuantityStock()
{//13
return quantityStock;
}//13
public String getInventoryHardware()
{//14
return inventoryHardware;
}//14
public double computeinventoryValue()
{//15
return quantityStock * unitPrice;
}//15
public double computetotalInventory()
{//16
return totalInventory = totalInventory + inventoryValue;
}//16
public String toString()
{//17
return (itemName);
}//17
}//2
}//1
// SubItem.java
// Sub class to main program
public class SubItem extends Item
{//18
private String inventoryHardware;
private double restockingFee = .05;
public SubItem(double UnitPrice,double QuantityStock,int InventoryWriteoffs,int
ItemNumber,String ItemName)
{//19
setUnitPrice(UnitPrice);
setQuantityStock(QuantityStock);
setItemNumber(ItemNumber);
setItemName(ItemName);
inventoryWriteoffs = InventoryWriteoffs;
}//19
public void setInventoryHardware(String InventoryHardware)
{//20
inventoryHardware = InventoryHardware;
}//20
public int getInventoryHardware()
{//21
return inventoryWriteoffs;
}//21
public double computeRestockingFee()
{//22
return ((getUnitPrice() * getQuantityStock()) * restockingFee);
}//22
}//18
private static BufferedReader stdin = new BufferedReader( new InputStreamReader(      System.in ) );
private static int totalCount = 5;
public Inventory4()
{//23
double unitPrice; // Unit price of each item
double quantityStock; // Number of items in stock
double inventoryValue; // Place holder for calculated inventory value
double totalInventory; // Place holder for calculated total inventory value
int itemNumber; // Item Number
String itemName = ""; // Name of each item
}//23
public static void main(String[] args)throws IOException
{//24
SubItem myItem[];
myItem = new SubItem[5];
myItem[0] = new SubItem(10.35,20,4,1,"Traxx");
myItem[1] = new SubItem(176.34,10,5,2,"Panels");
myItem[2] = new SubItem(85.34,4,4,3,"Surfaces");
myItem[3] = new SubItem(1.95,56,6,4,"Brackets");
myItem[4] = new SubItem(82.34,8,1,5,"Overheads");
printArray(myItem);
myItem = sortArray(myItem);
System.out.println(" Inventory List Sorted by Items \n\n");
printArray(myItem);
ItemButton itemButton = new ItemButton(myItem,totalCount); // Make ItemButton
itemButton.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
itemButton.setSize( 350,390 ); // Window size
itemButton.setVisible( true ); // display window
} //24 End Main Method
private static SubItem[] printArray(SubItem[] myItem)
{//25
double totalInventory = 0;
double restockingFee = 0;
for (int i = 0; i<5;++i)
{//26
System.out.println("\n The Item Number is " + i + myItem.getItemNumber() );
System.out.println("\n Item Name is " + myItem.getItemName() );
System.out.println("\n Quantity in Stock is " + myItem.getQuantityStock() );
System.out.println("\n Inventory Write-off is " +      myItem.getInventoryWriteoffs() );
System.out.println("\n Inventory Value is $" + myItem.computeinventoryValue               ());
totalInventory = totalInventory + myItem.computeinventoryValue();
restockingFee = totalInventory + myItem.computeRestockingFee();
} //26 End For Loop
System.out.println("\n Total Value of all inventory is " + totalInventory);
System.out.println("\n Total Value of all inventory with restock fee $" +      restockingFee);
return myItem;
}//25
private static SubItem[] sortArray(SubItem[] myItem)
{//27
SubItem temp = new SubItem();
int i, j;
int array_size = 5;
for (i = (array_size - 1); i >= 0; i--)
{//28
for (j = 1; j <= i; j++)
{//29
if (myItem[j-1].getItemName().compareTo(myItem[j].getItemName()) > 1)
{//30
temp = myItem[j-1];
myItem[j-1] = myItem[j];
myItem[j] = temp;
} //30 End if
} //29 End inner for loop
} //28 End outer for loop
return myItem;
} //27 End Method
// ItemButton.java
// This will create GUI buttons.
// Display the Items.
import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
import javax.swing.SwingConstants;
public class ItemButton extends JFrame
{//31
private JButton nextJButton; // text button
private JButton prevJButton; // icon button
private JLabel lblItemName; // text field with set size
private JTextField txtItemName; // text field constructed with text
private JTextField textField3; // text field with text and size
private JLabel lblItemNumber; // text field with set size
private JTextField txtItemNumber; // text field constructed with text
private JLabel lblUnitPrice; // text field with set size
private JTextField txtUnitPrice; // text field constructed with text
private JLabel lblQuantityStock; // text field with set size
private JTextField txtQuantityStock; // text field constructed with text
private JLabel lblInventoryWriteoffs; // text field with set size
private JTextField txtInventoryWriteoffs; // text field constructed with text
private JLabel lblcomputeRestockingFee; // text field with set size
private JTextField txtcomputeRestockingFee; // text field constructed with text
private JLabel lblcomputeinventoryValue; // text field with set size
private JTextField txtcomputeinventoryValue; // text field constructed with text
private JLabel lblcomputetotalInventory; // text field with set size
private JTextField txtcomputetotalInventory; // text field constructed with text
SubItem[] arraySubItem;
private int currentArrayCounter;
private int arrayCount;
public ItemButton(SubItem[] myItem, int totalArrayCount)
{//32
super ( "Inventory" );
arraySubItem = myItem;
arrayCount = totalArrayCount;
currentArrayCounter = 0;
setLayout( new FlowLayout() ); // set frame layout
Icon iconNext = new ImageIcon( getClass().getResource( "" ) );
Icon iconPrev = new ImageIcon( getClass().getResource( "" ) );
lblItemName = new JLabel( "Item Name ");
add( lblItemName ); // textField3 to JFrame
txtItemName = new JTextField( "", 15 );
add( txtItemName ); // add textField3 to JFrame
lblItemNumber = new JLabel( "Item Number ");
add( lblItemNumber ); // textField3 to JFrame
txtItemNumber = new JTextField( "", 15 );
add( txtItemNumber ); // add textField3 to JFrame
lblUnitPrice = new JLabel( "Unit Price ");
add( lblUnitPrice ); // textField3 to JFrame
txtUnitPrice = new JTextField( "", 15 );
add( txtUnitPrice ); // add textField3 to JFrame
lblQuantityStock = new JLabel( "Quantity Stock " );
add( lblQuantityStock ); // textField3 to JFrame
txtQuantityStock = new JTextField( "", 15 );
add( txtQuantityStock ); // add textField3 to JFrame
lblInventoryHardware = new JLabel( "Inventory Hardware " );
add( lblInventoryHardware ); // textField3 to JFrame
          txtInventoryHardware = new JTextField( "", 15 );
add( txtInventoryHardware ); // add textField3 to JFrame
lblcomputeRestockingFee = new JLabel( "Restocking Fee ");
add( lblcomputeRestockingFee ); // textField3 to JFrame
txtcomputeRestockingFee = new JTextField( "", 15 );
add( txtcomputeRestockingFee ); // add textField3 to JFrame
lblcomputeinventoryValue = new JLabel( "Inventory Value " );
add( lblcomputeinventoryValue ); // textField3 to JFrame
txtcomputeinventoryValue = new JTextField( "", 15 );
add( txtcomputeinventoryValue ); // add textField3 to JFrame
lblcomputetotalInventory = new JLabel( "Total Inventory ");
add( lblcomputetotalInventory ); // textField3 to JFrame
txtcomputetotalInventory = new JTextField( "", 15 );
add( txtcomputetotalInventory ); // add textField3 to JFrame
               nextJButton = new JButton( "Next" ); // button with Next
               prevJButton = new JButton( "Previous"); // button with Prev
               add(prevJButton);
               add(nextJButton); // add plainJButton to JFrame
               ButtonHandler handler = new ButtonHandler();
nextJButton.addActionListener( handler );
prevJButton.addActionListener( handler );
setTextFields();
} //32 End ButtonFrame constructor
private class ButtonHandler implements ActionListener
{//33
public void actionPerformed( ActionEvent event )
{//34
if (event.getActionCommand()== "prevJButton")
{//35
currentArrayCounter++;
}//35
else
{//36
currentArrayCounter++;
}//36
setTextFields();
} //34 End Method ActionPerformed
} //33 End Private inner class ButtonHandler
private void setTextFields()
{//37
if (currentArrayCounter == arrayCount)
{//38
currentArrayCounter = 0;
}//38
if (currentArrayCounter < 0)
{//39
currentArrayCounter = arrayCount;
}//39
txtItemName.setText(arraySubItem[currentArrayCounter].getItemName());
txtItemNumber.setText(arraySubItem[currentArrayCounter].getItemNumber()      +"");
txtUnitPrice.setText(arraySubItem[currentArrayCounter].getUnitPrice()+"");
txtQuantityStock.setText(arraySubItem[currentArrayCounter].getQuantityStock      ()+"");
txtInventoryWriteoffs.setText(arraySubItem      [currentArrayCounter].getInventoryWriteoffs()+"");
txtcomputeRestockingFee.setText(arraySubItem      [currentArrayCounter].computeRestockingFee()+"");
txtcomputeinventoryValue.setText(arraySubItem     [currentArrayCounter].computeinventoryValue()+"");
txtcomputetotalInventory.setText(arraySubItem      [currentArrayCounter].computetotalInventory()+"");
}//37
} //31 End class ItemButton
{code}

Answer 1

I have eliminated most of the problems, but I am still getting 11 Class interface or emun errors.
It says the first error is in the lines that import the GUI buttons
// Inventory4.java
// Program will track total inventory items in stock.
import java.io.*;
import javax.swing.JFrame;
public class Inventory4
{//1
   public static void main (String [] args)  ;
     {//40
       class Item
       {//2
         private double unitPrice;
         private double quantityStock;
         private double inventoryValue;
         private double totalInventory;
         private int itemNumber;
         private String itemName;
                      /** Create a new instance of Item Name */
                   public Item(double UnitPrice,double QuantityStock,int                                                
                              ItemNumber,String ItemName)
                                          {//3
                                             itemName = ItemName;
                                             itemNumber = itemNumber;
                                             unitPrice = UnitPrice;
                                            quantityStock = QuantityStock;
                                            }//3
                                                       public void setItemName(String ItemName)
                                                      {//4
                                                    itemName = ItemName;
                                                        }//4
                                                       public void setItemNumber(int ItemNumber)
                                                        {//5
                                                   itemNumber = ItemNumber;
                                                         }//5
                                                      public void setUnitPrice(String InventoryHardware)
                                                               {//6
                                                             inventoryHardware=InventoryHardware;
                                                                }//6
                                                      public void setUnitPrice(double UnitPrice)
                                                                {//7
                                                  unitPrice = UnitPrice;
                                                                 }//7
                                                      public void setQuantityStock(double QuantityStock)
                                                                       {//8
                                                 quantityStock = QuantityStock;
                                                                         }//8
                                                      public String getItemName()
                                                                         {//9
                                                  return itemName;
                                                                                 }//9
                                                      public int getItemNumber()
                                                                                 {//10
                                                  return itemNumber;
                                                                                        }//10
                    public String getInvetoryHardware()
                                                                                          {//11
                    return inventoryHardware;
                                                                                            }//11
                                                      public double getUnitPrice()
                                                                                               {//12
                                                 return unitPrice;
                                                                                                 }//12
                                                      public double getQuantityStock()
                                                                                                       {//13
                                                return quantityStock;
                                                                                                        }//13
                                                      public String getInventoryHardware()
                                                                                                              {//14
                                                return inventoryHardware;
                                                                                                               }//14
                                                                           public double computeinventoryValue()
                                                                                                                    {//15
                                                                      return quantityStock * unitPrice;
                                                                                                                        }//15
                                                                             public double computetotalInventory()
                                                                                                                            {//16
                                                           return totalInventory = totalInventory + inventoryValue;
                                                                                                                              }//16               
                                                                                 public String toString()
                                                                                                                              {//17
                                                                           return (itemName);
                                                                                                                                }//17
        }//2
     }//40
                        // SubItem.java
                        // Sub class to main program
     public class SubItem extends Item
    {//18
              private String inventoryHardware;
              private double restockingFee = .05;
                    public SubItem(double UnitPrice,double QuantityStock,int InventoryHardware,int
                                           ItemNumber,String ItemName)
          {//19
               setUnitPrice(UnitPrice);
               setQuantityStock(QuantityStock);
               setItemNumber(ItemNumber);
               setItemName(ItemName);
               inventoryHardware = InventoryHardware;
           }//19
              public void setInventoryHardware(String InventoryHardware)
                   {//20
                 inventoryHardware = InventoryHardware;
                   }//20
                  public int getInventoryHardware()
                           {//21
                  return inventoryHardware;
                            }//21
                          public double computeRestockingFee()
                                   {//22
                return ((getUnitPrice() * getQuantityStock()) * restockingFee);
                                    }//22
        }//18
               private static BufferedReader stdin = new BufferedReader( new InputStreamReader(      
                System.in ) );
              private static int totalCount = 5;
      public Inventory4()
         {//23
     double unitPrice; // Unit price of each item
     double quantityStock; // Number of items in stock
     double inventoryValue; // Place holder for calculated inventory value
     double totalInventory; // Place holder for calculated total inventory value
     int itemNumber; // Item Number
     String itemName = ""; // Name of each item
            }//23
   public static void main(String[] args)throws IOException
       {//24
     SubItem myItem[];
      myItem = new SubItem[5];
    myItem[0] = new SubItem(10.35,20,4,1,"Traxx");
    myItem[1] = new SubItem(176.34,10,5,2,"Panels");
    myItem[2] = new SubItem(85.34,4,4,3,"Surfaces");
    myItem[3] = new SubItem(1.95,56,6,4,"Brackets");
    myItem[4] = new SubItem(82.34,8,1,5,"Overheads");
         printArray(myItem);
         myItem = sortArray(myItem);
         System.out.println(" Inventory List Sorted by Items \n\n");
          printArray(myItem);
    ItemButton itemButton = new ItemButton(myItem,totalCount); // Make ItemButton
    itemButton.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
    itemButton.setSize( 350,390 ); // Window size
    itemButton.setVisible( true ); // display window
               } //24 End Main Method
      private static SubItem[] printArray(SubItem[] myItem)
                      {//25
          double totalInventory = 0;
          double restockingFee = 0;
                     for (int i = 0; i<5;++i)
                      {//26
                           System.out.println("\n The Item Number is " + i + myItem.getItemNumber() );
                           System.out.println("\n Item Name is " + myItem.getItemName() );
                           System.out.println("\n Quantity in Stock is " + myItem.getQuantityStock() );
                           System.out.println("\n Inventory Hardware " +                                                    
              myItem.getInventoryHardware() );
                           System.out.println("\n Inventory Value is $" + myItem.computeinventoryValue          
                           totalInventory = totalInventory + myItem.computeinventoryValue();
                           restockingFee = totalInventory + myItem.computeRestockingFee();
                              } //26 End For Loop
                               System.out.println("\n Total Value of all inventory is " + totalInventory);
                               System.out.println("\n Total Value of all inventory with restock fee $" +             
                                   restockingFee);
                               return myItem;
                                }//25
   private static SubItem[] sortArray(SubItem[] myItem)
{//27
      SubItem temp = new SubItem();
          int i, j;
         int array_size = 5;
         for (i = (array_size - 1); i >= 0; i--)
     {//28
             for (j = 1; j <= i; j++)
           {//29
                   if (myItem[j-1].getItemName().compareTo(myItem[j].getItemName()) > 1)
               {//30
                  temp = myItem[j-1];
                  myItem[j-1] = myItem[j];
                  myItem[j] = temp;
                } //30 End if
             } //29 End inner for loop
        } //28 End outer for loop
                          return myItem;
} //27 End Method
}//1
// ItemButton.java
// This will create GUI buttons.
// Display the Items.
import java.awt.FlowLayout;//line252
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
import javax.swing.SwingConstants;
  public class ItemButton extends JFrame
      {//31
        private JButton nextJButton; // text button
        private JButton prevJButton; // icon button
        private JLabel lblItemName; // text field with set size
        private JTextField txtItemName; // text field constructed with text
        private JTextField textField3; // text field with text and size
        private JLabel lblItemNumber; // text field with set size
        private JTextField txtItemNumber; // text field constructed with text
        private JLabel lblUnitPrice; // text field with set size
        private JTextField txtUnitPrice; // text field constructed with text
        private JLabel lblQuantityStock; // text field with set size
        private JTextField txtQuantityStock; // text field constructed with text
        private JLabel lblInventoryHardware; // text field with set size
        private JTextField txtInventoryHardware; // text field constructed with text
        private JLabel lblcomputeRestockingFee; // text field with set size
        private JTextField txtcomputeRestockingFee; // text field constructed with text
        private JLabel lblcomputeinventoryValue; // text field with set size
        private JTextField txtcomputeinventoryValue; // text field constructed with text
        private JLabel lblcomputetotalInventory; // text field with set size
        private JTextField txtcomputetotalInventory; // text field constructed with text
            SubItem[] arraySubItem;
            private int currentArrayCounter;
            private int arrayCount;
               public ItemButton(SubItem[] myItem, int totalArrayCount)
       {//32
                super ( "Inventory" );
                arraySubItem = myItem;
                arrayCount = totalArrayCount;
                currentArrayCounter = 0;
                setLayout( new FlowLayout() ); // set frame layout
                     Icon iconNext = new ImageIcon( getClass().getResource( "" ) );
                     Icon iconPrev = new ImageIcon( getClass().getResource( "" ) );
                               lblItemName = new JLabel( "Item Name ");
                               add( lblItemName ); // textField3 to JFrame
                               txtItemName = new JTextField( "", 15 );
                               add( txtItemName ); // add textField3 to JFrame
                               lblItemNumber = new JLabel( "Item Number ");
                               add( lblItemNumber ); // textField3 to JFrame
                               txtItemNumber = new JTextField( "", 15 );
                               add( txtItemNumber ); // add textField3 to JFrame
                               lblUnitPrice = new JLabel( "Unit Price ");
                              add( lblUnitPrice ); // textField3 to JFrame
                              txtUnitPrice = new JTextField( "", 15 );
                              add( txtUnitPrice ); // add textField3 to JFrame
                              lblQuantityStock = new JLabel( "Quantity Stock " );
                              add( lblQuantityStock ); // textField3 to JFrame
                              txtQuantityStock = new JTextField( "", 15 );
                              add( txtQuantityStock ); // add textField3 to JFrame
                              lblInventoryHardware = new JLabel( "Inventory Hardware " );
                             add( lblInventoryHardware ); // textField3 to JFrame
               txtInventoryHardware = new JTextField( "", 15 );
                             add( txtInventoryHardware ); // add textField3 to JFrame
                             lblcomputeRestockingFee = new JLabel( "Restocking Fee ");
                             add( lblcomputeRestockingFee ); // textField3 to JFrame
                             txtcomputeRestockingFee = new JTextField( "", 15 );
                             add( txtcomputeRestockingFee ); // add textField3 to JFrame
                              lblcomputeinventoryValue = new JLabel( "Inventory Value " );
                              add( lblcomputeinventoryValue ); // textField3 to JFrame
                              txtcomputeinventoryValue = new JTextField( "", 15 );
                              add( txtcomputeinventoryValue ); // add textField3 to JFrame
                              lblcomputetotalInventory = new JLabel( "Total Inventory ");
                              add( lblcomputetotalInventory ); // textField3 to JFrame
                              txtcomputetotalInventory = new JTextField( "", 15 );
                              add( txtcomputetotalInventory ); // add textField3 to JFrame
               nextJButton = new JButton( "Next" ); // button with Next
               prevJButton = new JButton( "Previous"); // button with Prev
               add(prevJButton);
               add(nextJButton); // add plainJButton to JFrame
                 ButtonHandler handler = new ButtonHandler();
                                      nextJButton.addActionListener( handler );
                                      prevJButton.addActionListener( handler );
                                      setTextFields();
} //32 End ButtonFrame constructor
        private class ButtonHandler implements ActionListener
   {//33
      public void actionPerformed( ActionEvent event )
     {//34
           if (event.getActionCommand()== "prevJButton")
         {//35
              currentArrayCounter++;
          }//35
             else
                {//36
              currentArrayCounter++;
                  }//36
                    setTextFields();
       } //34 End Method ActionPerformed
} //33 End Private inner class ButtonHandler
private void setTextFields()
{//37
           if (currentArrayCounter == arrayCount)
              {//38
                 currentArrayCounter = 0;
                 }//38
           if (currentArrayCounter < 0)
                {//39
                   currentArrayCounter = arrayCount;
                  }//39
                       txtItemName.setText(arraySubItem[currentArrayCounter].getItemName());
                       txtItemNumber.setText(arraySubItem[currentArrayCounter].getItemNumber()          
              +"");
                       txtUnitPrice.setText(arraySubItem[currentArrayCounter].getUnitPrice()+"");
                       txtQuantityStock.setText(arraySubItem[currentArrayCounter].getQuantityStock      
              ()+"");
                        txtInventoryHardware.setText(arraySubItem                           
[currentArrayCounter].getInventoryHardWare()+"");
                        txtcomputeRestockingFee.setText(arraySubItem                           
[currentArrayCounter].computeRestockingFee()+"");
                        txtcomputeinventoryValue.setText(arraySubItem                           
[currentArrayCounter].computeinventoryValue()+"");
                        txtcomputetotalInventory.setText(arraySubItem                             
[currentArrayCounter].computetotalInventory()+"");
  }//37
} //31 End class ItemButton