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  1. #1
    Kaosuvls is offline Member
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    Post Please Help out a bit with Java Program

    This is my assignment guys: Modify the Inventory Program by creating a subclass of the product class that uses one additional unique feature of the product you chose (for the DVDs subclass, you could use movie title, for example). In the subclass, create a method to calculate the value of the inventory of a product with the same name as the method previously created for the product class. The subclass method should also add a 5% restocking fee to the value of the inventory of that product.

    Modify the output to display this additional feature you have chosen and the restocking fee.

    My problem is I cannot get my code to display the restocking fee or the manufacturer properly. Can any one see something I am missing and explain in laymens terms please. I got it to display one manufacturer for notepads but it shows on all the others also and if I try to put more than one manufacturer it gives error.

    This is what I have:

    Java Code:
    // InventoryProgram.java
    // 
    // This program calculates inventory value
     
    package inventory.project;
    import java.util.Scanner;
    /**
     *
     * @author Curtis Criff
     */
    public class InventoryProject {
     
         // main method begins program execution
         public static void main(String args[] )
         {
              // create Scanner to obtain input from command window
              Scanner input = new Scanner( System.in );
     
              // display a welcome message to the InventoryProgramPart3 user
              System.out.println( "Welcome to the Inventory Program!" );
     
              // office supplies
               
              supplies[] supplies = new supplies[100]; // an array of 100 supplies
              manufacturer[] manufacturer = new manufacturer[100];
                     
              supplies notepads = new supplies( 04, "notepads", 60, 2.75 );
              supplies pencils = new supplies( 05, "pencils", 75, 1.25 );
              supplies folders = new supplies( 02, "folders", 30, 4.75 );
              supplies envelopes = new supplies( 01, "envelopes", 15, 5.25 );
              supplies markers = new supplies( 03, "markers", 45, 3.50 );
                                  
              // display the inventories one at a time
              envelopes.showInventory();
              folders.showInventory();
              markers.showInventory();
              notepads.showInventory();
              pencils.showInventory();
     
              // sort supplies by name
              for ( int i = 0; i < args.length; i++ )
              System.out.println( args[i] + ", " );
     
              double array[] = { 78.75, 142.50, 157.50, 165.00, 93.75 };
              double total = 0;
     
              // add each element's value to total
              for ( int counter = 0; counter < array.length; counter++)
                   total += array[ counter ];
              System.out.printf( "\nTotal inventory value is: $%.2f\n", total );
     
              System.out.println( "\nThank you for using the Inventory Program!\n" );
               
         } // end method main
     
    } // end class InventoryProgram    
     
    // Office Supplies
    class supplies
    {
         public int suppliesNumber;
         public String suppliesName = new String();
         public int suppliesUnits;
         public double suppliesPrice;
     
         // set supplies number
         public void setSuppliesNumber( int number )
         {
              this.suppliesNumber = number;
         } // end method set supplies number
     
         // return supplies number
         public int getSuppliesNumber()
         {
              return suppliesNumber;
         } // end method get supplies number
     
         // set supplies name
         public void setSuppliesName( String name )
         {
              this.suppliesName = name;
         } // end method set supplies name
     
         // return supplies name
         public String getSuppliesName()
         {
              return suppliesName;
         } // end method get supplies name
     
         // set supplies in stock
         public void setSuppliesUnits( int units )
         {
              this.suppliesUnits = units;
         } // end method set supplies units
     
         // return supplies units
         public int getSuppliesUnits()
         {
              return suppliesUnits;
         } // end method get supplies units
     
         // set supplies price
         public void setSuppliesPrice( double price )
         {
              this.suppliesPrice = price;
         } // end method set supplies price
     
         // return supplies price
         public double getSuppliesPrice()
         {
              return suppliesPrice;
         } // end method get supplies price
     
         // calculate supplies inventory value
         public double getValue()
         {
              return suppliesUnits * suppliesPrice;
         } // end method supplies inventory value
     
        // four-argument constructor
         supplies( int number, String name, int units, double price )
         {
              suppliesNumber = number;
              suppliesName = name;
              suppliesUnits = units;
              suppliesPrice = price;
         } // end four-argument constructor
     
        // display inventory
         public void showInventory()
         {
              System.out.println(); // outputs blank line
     
              System.out.println( "Product Number:  "+suppliesNumber );
              System.out.println( "Product Name:  "+suppliesName );
              System.out.println( "Units in Stock:  "+suppliesUnits );
              System.out.printf( "Unit Price:  $%.2f", suppliesPrice );
     
              manufacturer supplies = new manufacturer
                   ( 04, "notepads", 60, 2.75, "Ampad" );   
               
              System.out.println( "\nManufacturer:  "+supplies.getSuppliesManufacturer() ); 
                         
              // value() method and display the value
              System.out.printf( "\nInventory value of "+suppliesName+ " is = $%.2f\n",
                   getValue() );    
       
        } // end display inventory
     
    } // end class supplies
     
    class manufacturer extends supplies
    {
         // holds the supplies manufacturer
         private String suppliesManufacturer;
     
         // five-argument constructor
         manufacturer( int number, String name, int units,
              double price, String manufacturer )
         {
              super( number, name, units, price );
              suppliesManufacturer = manufacturer;
         } // end five-argument constructor
     
         // set supplies manufacturer
         public void setSuppliesManufacturer( String manufacturer )
         {
              this.suppliesManufacturer = manufacturer;
         } // end method set supplies manufacturer
     
         // return supplies manufacturer
         public String getSuppliesManufacturer()
         {
             return suppliesManufacturer;
         } // end method get supplies manufacturer
     
         // add 5% restocking fee
        @Override
         public double getValue()
         {
              return super.getValue() * 1.05;
         } // end method return supplies manufacturer
     
         // calculate restocking fee
         public double getRestockingFee()
         {
              return super.getValue() * .05;
         } //end method calculate restocking fee
               
         //return String representation of suppliesManufacturer
        @Override
         public String toString()
         {
              String formatString = "Manufacturer:  %s";
              formatString += "Restocking Fee:  $%.2f";
              formatString = String.format( formatString, suppliesManufacturer,
                   super.getValue() * 0.05 );
              return( formatString + super.toString() );
         } // end toString()
     
         // display inventory
        @Override
         public void showInventory()
         {
              super.showInventory();
              System.out.println( toString() );
              System.out.println( "\nManufacturer:  "+getSuppliesManufacturer() );
     
              // Display value plus restocking fee
              System.out.printf( "\nInventory value of "+suppliesName+ " is = $%.2f\n",
                   getRestockingFee() );    
     
         } // end method display inventory
     
    } // end class manufacturer

  2. #2
    Norm's Avatar
    Norm is offline Moderator
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    Default Re: Please Help out a bit with Java Program

    it gives error.
    Please copy and pasted here the full text of the error message.

  3. #3
    Kaosuvls is offline Member
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    Default Re: Please Help out a bit with Java Program

    There is no error code. The code compile and runs but does not do what it is suppose to do. It does not show Restocking Fee and Ampad shows on every Products Manufacturer list instead of just Notepads.

    This is the output from NetBeans 7.1

    Welcome to the Inventory Program!

    Product Number: 1
    Product Name: envelopes
    Units in Stock: 15
    Unit Price: $5.25
    Manufacturer: Ampad

    Inventory value of envelopes is = $78.75

    Product Number: 2
    Product Name: folders
    Units in Stock: 30
    Unit Price: $4.75
    Manufacturer: Ampad

    Inventory value of folders is = $142.50

    Product Number: 3
    Product Name: markers
    Units in Stock: 45
    Unit Price: $3.50
    Manufacturer: Ampad

    Inventory value of markers is = $157.50

    Product Number: 4
    Product Name: notepads
    Units in Stock: 60
    Unit Price: $2.75
    Manufacturer: Ampad

    Inventory value of notepads is = $165.00

    Product Number: 5
    Product Name: pencils
    Units in Stock: 75
    Unit Price: $1.25
    Manufacturer: Ampad

    Inventory value of pencils is = $93.75

    Total inventory value is: $637.50

    Thank you for using the Inventory Program!

  4. #4
    Norm's Avatar
    Norm is offline Moderator
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    Default Re: Please Help out a bit with Java Program

    It does not show Restocking Fee
    Where in your program is the Restocking Fee printed out?
    Where does the program execute the code that prints out the Restocking fee?

    If the code does not execute the printing out of the data, then it won't be printed.

    Play computer with your program and set through the code to see where it goes and why it is not printing out what you want.
    Also add some println statements to show execution flow and the values of variables as the code executes so you can see what the program is doing.

  5. #5
    Kaosuvls is offline Member
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    Default Re: Please Help out a bit with Java Program

    You have to forgive me as I am new to Java programming.

    The restocking fee should be under the manufacturer
    [code]
    // Display value plus restocking fee
    2 System.out.printf( "\nInventory value of "+suppliesName+ " is = $%.2f\n",
    3 getRestockingFee() );[code]

    I think this is where I ask the program to print out the restocking fee

    I do not exactly know where to put the println statements as I am fairly new to this and have not did any debugging as of yet.

    Thanks for the help.

  6. #6
    Norm's Avatar
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    Default Re: Please Help out a bit with Java Program

    Your code does not follow java coding conventions and that makes it harder to read. Class names should start with Uppercase letters and variables with lowercase letters.

    Where do you set the manufacturer for each Supplies object? I don't see where the Supplies class saves the manufacturer.
    If you call the Supplies class's showInventory() method there is no manufacturer saved in the class to show!!!

    There is a suppliesManufacturer variable in the Manufacturer class.

    You may need to redesign how you are using these classes.

  7. #7
    Kaosuvls is offline Member
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    Default Re: Please Help out a bit with Java Program

    Thanks for the help so far.

    I have gotten past my first post and now need a little constructive help with my GUI:

    I know where the errors are at which consist of lines 266 - 300 and line 411.

    If anyone can point me in the right direction, that would be great

    Here is the code

    Java Code:
    // InventoryProgram.java
    // 
    // This program calculates inventory values
     
    package inventory.project;
    import java.awt.BorderLayout;
    import java.awt.GridLayout;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.text.NumberFormat;
    import java.util.Arrays;
    import java.util.Comparator;
    import java.util.Scanner;
    import javax.swing.*;
    
    /**
     *
     * @author Curtis Criff
     */
    public class InventoryProject {
     
         // main method begins program execution
         public static void main(String args[] )
         {
              // create Scanner to obtain input from command window
              Scanner input = new Scanner( System.in );
     
              // display a welcome message to the InventoryProgramPart3 user
              System.out.println( "Welcome to the Inventory Program!" );
     
              // office supplies
               
              supplies[] supplies = new supplies[100]; // an array of 100 supplies
              manufacturer [] manufacturer = new manufacturer [100];
                     
              manufacturer notepads = new manufacturer ( 04, "notepads", 60, 2.75, "Rapid" );
              manufacturer pencils = new manufacturer( 05, "pencils", 75, 1.25, "Ampad" );
              manufacturer folders = new manufacturer( 02, "folders", 30, 4.75, "Rapid" );
              manufacturer envelopes = new manufacturer( 01, "envelopes", 15, 5.25, "Rapid" );
              manufacturer markers = new manufacturer( 03, "markers", 45, 3.50, "Ampad" );
              
              
              // display the inventories one at a time
              envelopes.showInventory();
              folders.showInventory();
              markers.showInventory();
              notepads.showInventory();
              pencils.showInventory();
     
              // sort supplies by name
              for ( int i = 0; i < args.length; i++ )
              System.out.println( args[i] + ", " );
     
              double array[] = { 78.75, 142.50, 157.50, 165.00, 93.75 };
              double total = 0;
     
              // add each element's value to total
              for ( int counter = 0; counter < array.length; counter++)
                   total += array[ counter ];
              System.out.printf( "\nTotal inventory value is: $%.2f\n", total );
     
              System.out.println( "\nThank you for using the Inventory Program!\n" );
               
         } // end method main
     
    } // end class InventoryProject 
    
    class supplies
    {
         public int suppliesNumber;
         public String suppliesName = new String();
         public int suppliesUnits;
         public double suppliesPrice;
     
         // set supplies number
         public void setSuppliesNumber( int number )
         {
              this.suppliesNumber = number;
         } // end method set supplies number
     
         // return supplies number
         public int getSuppliesNumber()
         {
              return suppliesNumber;
         } // end method get supplies number
     
         // set supplies name
         public void setSuppliesName( String name )
         {
              this.suppliesName = name;
         } // end method set supplies name
     
         // return supplies name
         public String getSuppliesName()
         {
              return suppliesName;
         } // end method get supplies name
     
         // set supplies in stock
         public void setSuppliesUnits( int units )
         {
              this.suppliesUnits = units;
         } // end method set supplies units
     
         // return supplies units
         public int getSuppliesUnits()
         {
              return suppliesUnits;
         } // end method get supplies units
     
         // set supplies price
         public void setSuppliesPrice( double price )
         {
              this.suppliesPrice = price;
         } // end method set supplies price
     
         // return supplies price
         public double getSuppliesPrice()
         {
              return suppliesPrice;
         } // end method get supplies price
     
         // calculate supplies inventory value
         public double getValue()
         {
              return suppliesUnits * suppliesPrice;
         } // end method supplies inventory value
     
        // four-argument constructor
         supplies( int number, String name, int units, double price )
         {
              suppliesNumber = number;
              suppliesName = name;
              suppliesUnits = units;
              suppliesPrice = price;
         } // end four-argument constructor
     
        // display inventory
         public void showInventory()
         {
              System.out.println(); // outputs blank line
     
              System.out.println( "Product Number:  "+suppliesNumber );
              System.out.println( "Product Name:  "+suppliesName );
              System.out.println( "Units in Stock:  "+suppliesUnits );
              System.out.printf( "Unit Price:  $%.2f", suppliesPrice );
              
              System.out.println(); // outputs blank line    
                                 
              // value() method and display the value
              System.out.printf( "\nInventory value of "+suppliesName+ " is = $%.2f\n",
                   getValue() );    
       
        } // end display inventory
     
    } // end class supplies
     
    class manufacturer extends supplies
    {
         // holds the supplies manufacturer
         private String suppliesManufacturer = "manufacturer";
         
           
         // five-argument constructor
          public manufacturer( int number, String name, int units,
              double price, String manufacturer )
         {
              super( number, name, units, price );
              this.suppliesManufacturer = manufacturer;
         } // end five-argument constructor
     
         // set supplies manufacturer
         public void setSuppliesManufacturer( String manufacturer )
         {
              suppliesManufacturer = manufacturer;
         } // end method set supplies manufacturer
     
         // return supplies manufacturer
         public String getSuppliesManufacturer()
         {
             return suppliesManufacturer;
         } // end method get supplies manufacturer
     
         // add 5% restocking fee
        @Override
         public double getValue()
         {
              return suppliesUnits * suppliesPrice;
         } // end method return supplies manufacturer
     
         // calculate restocking fee
         public double getRestockingFee()
         {
              return 0.05 * suppliesUnits * suppliesPrice;
         } //end method calculate restocking fee
               
         //return String representation of suppliesManufacturer
        @Override
         public String toString()
         {
              String formatString = "\nManufacturer:  %s";
              formatString += "\nRestocking Fee:  $%.2f";
              formatString = String.format( formatString, suppliesManufacturer,
                   super.getValue() * 0.05 );
              return( formatString );
         } // end toString()
     
         // display inventory
        @Override
         public void showInventory()
         {
              super.showInventory();
              System.out.println( toString() );
              
         } // end method display inventory
     
    } // end class manufacturer
    
     // GUI
    
     
     class Manufacturer  extends JFrame
    {
          NumberFormat nf = NumberFormat.getCurrencyInstance();
          private JPanel gridPanel = new JPanel();
    	 
          private JPanel panel = new JPanel();
    	 
    	       
    	      JButton nextButton;
    	 
    	       
    	      JTextField suppliesNumberField;
    	      JTextField suppliesNameField;
    	      JTextField suppliesUnitsField;
    	      JTextField suppliesPriceField;
    	      JTextField ValueofunitsField;
    	      JTextField suppliesManufacturerField;
    	      JTextField RestockingFeeField;
    	      JTextField TotalinventoryvalueField;
    	       
    	      JLabel lblsuppliesNumber;
    	      JLabel lblsuppliesName;
         	      JLabel lblsuppliesUnits;
    	      JLabel lblsuppliesPrice;
    	      JLabel lblValueofunits;
    	      JLabel lblsuppliesManufacturer;
    	      JLabel lblRestockingFee;
    	      JLabel lblTotalinventoryvalue;
    
    	       
    	      manufacturer envelopes;
    	      manufacturer folders;
    	      manufacturer markers;
    	      manufacturer notepads;
    	      manufacturer pencils;
    	 
    	 
          public static final int MAX_manufacturer = 100; // set maximum size for Supplies Array
    	      manufacturer[] manufacturer = new manufacturer[MAX_manufacturer]; // create Supplies Array object
    	      static int ArrayIndex = 0; // array index
    	 
          public Manufacturer() // constructor
    	      {
    	            
                envelopes = new ();                    
                envelopes.setsuppliesNumber("01");
                envelopes.setsuppliesName("envelopes");
                envelopes.suppliesUnits(15);
                envelopes.setsuppliesPrice(5.25);
                envelopes.setsuppliesManufacturer("Rapid");
    	             
    	             
                folders = new  ();           
                folders.setsuppliesNumber("02");
                folders.setsuppliesName("folders");
                folders.suppliesUnits(30);
                folders.setsuppliesPrice(4.75);
                folders.setsuppliesManufacturer("Rapid");
    	 
                markers = new  ();           
                markers.setsuppliesNumber("03");
                markers.setsuppliesName("markers");
                markers.suppliesUnits(45);
                markers.setsuppliesPrice(3.50);
                markers.setsuppliesManufacturer("Ampad");;
    	 
                notepads = new  ();           
                notepads.setsuppliesNumber("04");
                notepads.setsuppliesName("notepads");
                notepads.suppliesUnits(60);
                notepads.setsuppliesPrice(2.75);
                notepads.setsuppliesManufacturer("Rapid");
    	 
                pencils = new  ();           
                pencils.setsuppliesNumber("05");
                pencils.setsuppliesName("pencils");
                pencils.suppliesUnits(75);
                pencils.setsuppliesPrice(1.25);
                pencils.setsuppliesManufacturer("Ampad");
    	 
    	             
                manufacturer[0] = envelopes;
    	    manufacturer[1] = folders;
    	    manufacturer[2] = markers;
    	    manufacturer[3] = notepads;
    	    manufacturer[4] = pencils;
     
    	 
                gridPanel.setLayout(new BorderLayout()); // create a border layout
                gridPanel.add(this.createLabelPanel(), BorderLayout.WEST); // add label panel
                gridPanel.add(this.createTextPanel(), BorderLayout.CENTER); // add field panel
                gridPanel.add(this.createButtonPanel(), BorderLayout.SOUTH); // add button panel
                add(gridPanel);
          }
    	       
          private JPanel createButtonPanel()
          {
                ActionListener btnListen = new ButtonListener();
    	             
                nextButton = new JButton("Next Product"); 
                nextButton.setActionCommand("Next"); 
                nextButton.addActionListener(btnListen);
    	             
                JPanel panel = new JPanel();
                panel.add(nextButton);
                return panel;
          }
          private JPanel createLabelPanel()
          {
                
                lblsuppliesNumber = new JLabel("Product Number: ");
                lblsuppliesName = new JLabel("Product Name: ");
                lblsuppliesUnits = new JLabel("Units in Stock: ");
                lblsuppliesPrice = new JLabel("Unit Price: ");
                lblValueofunits = new JLabel("Value Of Units In Stock: ");
                
                 
                lblsuppliesManufacturer = new JLabel("Manufacturer: ");
                lblRestockingFee = new JLabel("Restocking Fee: ");
                lblTotalinventoryvalue = new JLabel("Total Inventory Value: ");
     
                panel = new JPanel();
                panel.setLayout(new GridLayout(8, 1, 5 , 5));
    	             
                panel.add(lblsuppliesNumber);
                panel.add(lblsuppliesName);
                panel.add(lblsuppliesUnits);
                panel.add(lblsuppliesPrice);
                panel.add(lblValueofunits);
                panel.add(lblsuppliesManufacturer);
                panel.add(lblRestockingFee);
                panel.add(lblTotalinventoryvalue);
                return panel;// return the panel
          }
          private JPanel createTextPanel()
          {
                 
                suppliesNumberField = new JTextField();
                suppliesNumberField.setEditable(false);
    	             
     
                suppliesNameField = new JTextField();
                suppliesNameField.setEditable(false); 
     
     
                suppliesPriceField = new JTextField();
                suppliesPriceField.setEditable(false); 
    	 
    	 
                suppliesUnitsField = new JTextField();  
                suppliesUnitsField.setEditable(false);
    	 
                ValueofunitsField = new JTextField();
                ValueofunitsField.setEditable(false);
    	 
                suppliesManufacturerField = new JTextField();  
                suppliesManufacturerField.setEditable(false);  
    	 
                RestockingFeeField = new JTextField();
                RestockingFeeField.setEditable(false);
    	 
                TotalinventoryvalueField = new JTextField();
                TotalinventoryvalueField.setEditable(false);
    	 
    	 
                panel = new JPanel();
                panel.setLayout(new GridLayout(8, 1 , 5 , 5));
                panel.add(suppliesNumberField);
                panel.add(suppliesNameField);
                panel.add(suppliesPriceField);
                panel.add(suppliesUnitsField);
                panel.add(ValueofunitsField);
                panel.add(suppliesManufacturerField);
                panel.add(RestockingFeeField);
                panel.add(TotalinventoryvalueField);
     
    	 
    	 
    	 
    	 
                return panel; // return the panel
          } // end createTextPanel method
            // nested ButtonListener class
          class ButtonListener implements ActionListener
          {
            @Override
                public void actionPerformed(ActionEvent e)
                {
                     
                      Arrays.sort(manufacturer, new suppliesComparator();
                      if (e.getActionCommand().equals("Next"))
                            if (ArrayIndex < manufacturer.length)
                            {
                                  suppliesNumberField.setText(nf.format(manufacturer[ArrayIndex].getSuppliesNumber()));
                                   
                                  suppliesNameField.setText(manufacturer[ArrayIndex].getSuppliesName());
                                   
                                  suppliesPriceField.setText(nf.format(manufacturer[ArrayIndex].getSuppliesPrice()));
    	                               
                                  suppliesUnitsField.setText(String.valueOf(manufacturer[ArrayIndex].getSuppliesUnits()));
    	                               
                                  ValueofunitsField.setText(nf.format(manufacturer[ArrayIndex].getValue()));
    	                               
                                  suppliesManufacturerField.setText(String.valueOf(manufacturer[ArrayIndex].getSuppliesManufacturer()));
    	                               
                                  RestockingFeeField.setText(nf.format(manufacturer[ArrayIndex].getRestockingFee()));
    	                               
                                  TotalinventoryvalueField.setText(nf.format(manufacturer[ArrayIndex].getValue()));
    	 
                                  ArrayIndex = ArrayIndex + 1;
                            } // end if
                } // end actionPerformed
          } // end class ButtonListener
    } // end FrameHelperClass
    
    
    
    	 
    class suppliesComparator<T> implements Comparator<T>
    {
    	 
        @Override
        public int compare (Object suppliesOne , Object suppliesTwo)
    	             
    	 
        {
    	 
            String SuppliesName1 = ((supplies)suppliesOne).getSuppliesName().toUpperCase();
            String SuppliesName2 = ((supplies)suppliesTwo).getSuppliesName().toUpperCase();
    	 
    	 
    	         
            if (!(SuppliesName1.equals(SuppliesName2)))
                      return SuppliesName1.compareTo(SuppliesName2);
                else
                      return SuppliesName2.compareTo(SuppliesName1);
    	 
        }
    }

  8. #8
    Norm's Avatar
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    Default Re: Please Help out a bit with Java Program

    Please copy and post here the full text of the error messages if you want help with them.

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