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  1. #1
    Join Date
    Jul 2010
    Posts
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    Default Array Munipulation help please

    Problem 1
    I am trying to display First, Last, Next, Previous. I am not having luck tried it several different ways.

    Problem 2
    Getting Add, Delete, Modify, and Search to work.

    If anyone could help with with Problem one that would be great. Here is my code.

    Java Code:
    package framehelper;
    
    /** Program:    InventoryProgram
     *  File:       FrameHelper.java
     *  Summary:    Inherits JFrame class to build a window application that
     *              contains label and text fields.
     *  Author:     Shannon Jardine
     *  Date:       July 25, 2010
     **/
    import files.Files;
    import java.text.NumberFormat;  // import Java package used to format currency
    import manufacture.Manufacture; //Import the Manufacture Class
    import firstnamecomparator.FirstNameComparator; //Import the FirstNameComparator class
    import java.awt.GridLayout;       // required to create a grid layout
    import java.awt.BorderLayout;     // required to create a border layout
    import java.awt.event.ActionEvent; // required for click events
    import java.awt.event.ActionListener; // required for click events
    import javax.swing.JPanel;  // required to create panels
    import javax.swing.JFrame;  // required to use the frame
    import javax.swing.JButton;  // required to create buttons
    import javax.swing.JLabel;  // required to create text fields
    import javax.swing.JTextField; // required to create text fields
    import java.util.Arrays;  // required to sort array
    import javax.swing.ImageIcon;   // regired to access images
    import javax.swing.JOptionPane;  // required to use message dialog box
    
    
    public class FrameHelper extends JFrame
    {
        NumberFormat nf = NumberFormat.getCurrencyInstance();  // used to format currency
    
          // Declare Class Variables
    
          // Declare two panels. gridPanel is main panel. panel is inserted into
    
          // gridPanel.
    
          private JPanel gridPanel = new JPanel(); // one panel that contains my gridlayout.
          private JPanel panel = new JPanel(); // panel used to contain buttons, labels and text fields
    
          //NumberFormat nf = NumberFormat.getCurrencyInstance();  // used to format currency
          // Declare buttons
    
          JButton firstButton; // first button
          JButton nextButton; // next button
          JButton previousButton; // previous button
          JButton lastButton; // last button
          JButton addButton;  // add button
          JButton deleteButton;  // delete button
          JButton modifyButton;  // modify button
          JButton saveButton;  // save button
          JButton searchButton;  // search button
    
    
          // Declare Text Fields
    
          JTextField nameField; // name field
          JTextField itemNumberField; // Iem number field
          JTextField numberOfUnitsInStockField; // Units in Stock field
          JTextField priceField; // Price of units field
          JTextField manufactureField; // item manufacture field
          JTextField totalInventoryField;  // sum of the inventory
          JTextField restockingFeeField; // restock fee field
          JTextField companyNameField; // company name label
    
          // Declare Labels
    
          JLabel lblName; // name label
          JLabel lbItemNumber; // Item label
          JLabel lblNumberOfUnitsInStock; // Units in Stock label
          JLabel lblManufacture; // Manufacture label
          JLabel lblPrice; // Price Label
          JLabel lblTotalInventory;  // total inventory label
          JLabel lblRestockingFee; // restock fee label
          JLabel lblLogo; // logo label
          JLabel lblCompanyName; // company name label
    
          // Declare 5 Manufacture objects
    
          Manufacture manufacture1;
          Manufacture manufacture2;
          Manufacture manufacture3;
          Manufacture manufacture4;
          Manufacture manufacture5;
    
          public static final int MAX_MANUFACTURES = 5; // set maximum size for Manufacture Array
    
          Manufacture[] item = new Manufacture[MAX_MANUFACTURES]; // create Manufacture Array object
    
          static int ArrayIndex = 0; // array index
    
          public FrameHelper() // constructor
          {
                // create and initialize five new Manufacture objects
              manufacture1 = new Manufacture();
              manufacture1.setItemNumber(1);
              manufacture1.setProductName("Slinks");
              manufacture1.setNumberOfUnitsInStock(4);
              manufacture1.setPriceOfUnit(26.00);
              manufacture1.setManufacture("PD");
    
    
              manufacture2 = new Manufacture();
              manufacture2.setItemNumber(2);
              manufacture2.setProductName("Googles");
              manufacture2.setNumberOfUnitsInStock(6);
              manufacture2.setPriceOfUnit(15.00);
              manufacture2.setManufacture("Flex Vision");
    
    
              manufacture3 = new Manufacture();
              manufacture3.setItemNumber(3);
              manufacture3.setProductName("LogBook");
              manufacture3.setNumberOfUnitsInStock(6);
              manufacture3.setPriceOfUnit(15.00);
              manufacture3.setManufacture("Log3");
    
              manufacture4 = new Manufacture();
              manufacture4.setItemNumber(4);
              manufacture4.setProductName("Gloves");
              manufacture4.setNumberOfUnitsInStock(4);
              manufacture4.setPriceOfUnit(12.00);
              manufacture4.setManufacture("Converse");
    
    
              manufacture5 = new Manufacture();
              manufacture5.setItemNumber(5);
              manufacture5.setProductName("Closing Loop");
              manufacture5.setNumberOfUnitsInStock(18);
              manufacture5.setPriceOfUnit(2.00);
              manufacture5.setManufacture("Here Hopin it Opens");
    
    
                // add Manufacture objects to Array of Manufactures object
    
                item[0] = manufacture1;
                item[1] = manufacture2;
                item[2] = manufacture3;
                item[3] = manufacture4;
                item[4] = manufacture5;
    
                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);
          }
          // helper method creates a panel for the button
    
          private JPanel createButtonPanel()
          {
                ActionListener btnListen = new ButtonListener(); // create listener
    
                // create button objects
              firstButton = new JButton("First"); // create button object
              firstButton.setActionCommand("First"); // add actionCommand
              firstButton.addActionListener(btnListen); // add Listener command
    
              
              nextButton = new JButton("Next"); // create button object
              nextButton.setActionCommand("Next"); // add actionCommand
              nextButton.addActionListener(btnListen); // add Listener command
    
    
              previousButton = new JButton("Previous"); // create button object
              previousButton.setActionCommand("Previous"); // add actionCommand
              previousButton.addActionListener(btnListen); // add Listener command
    
              lastButton = new JButton("Last"); // create button object
              lastButton.setActionCommand("Last"); // add actionCommand
              lastButton.addActionListener(btnListen); // add Listener command
    
              addButton = new JButton("Add"); // create button object
              addButton.setActionCommand("Add"); // add actionCommand
              addButton.addActionListener(btnListen); // add Listener command
    
              deleteButton = new JButton("Delete"); // create button object
              deleteButton.setActionCommand("Delete"); // add actionCommand
              deleteButton.addActionListener(btnListen); // add Listener command
    
              modifyButton = new JButton("Modify"); // create button object
              modifyButton.setActionCommand("Modify"); // add actionCommand
              modifyButton.addActionListener(btnListen); // add Listener command
    
              saveButton = new JButton("Save"); // create button object
              saveButton.setActionCommand("Save"); // add actionCommand
              saveButton.addActionListener(btnListen); // add Listener command
    
              searchButton = new JButton("Search"); // create button object
              searchButton.setActionCommand("Search"); // add actionCommand
              searchButton.addActionListener(btnListen); // add Listener command
    
    
              // create panel object
    
              JPanel panels = new JPanel();
    
              panels.add(firstButton); // add first button to panel
              panels.add(nextButton); // add next button to panel
              panels.add(previousButton); // add previous button to panel
              panels.add(lastButton); // add last button to panel
              panels.add(addButton); // add add button to panel
              panels.add(deleteButton); // add delete button to panel
              panels.add(modifyButton); // add modify button to panel
              panels.add(saveButton); // add save button to panel
              panels.add(searchButton); // add search button to panel
    
    
                return panels; // return panel
    
         } // end createButtonPanel method
    
          private JPanel createLabelPanel()
          {
                // create instance of label objects
                ImageIcon icon = new ImageIcon(".\\src\\FarNorthLogo.jpg");   // load the image file
                lblLogo = new JLabel(icon); // add the image to the label
    
                lblName = new JLabel("Name:"); // label for name of item
                lbItemNumber = new JLabel("Item:"); // label for name of item
                lblNumberOfUnitsInStock = new JLabel("Units in Stock:"); // label for items in stock
                lblManufacture = new JLabel("Manufacture:"); // label for manufacture color
                lblPrice = new JLabel("Price");// Label price
                lblRestockingFee = new JLabel("Sum of inv:");
                lblTotalInventory = new JLabel("Restockin"); // label for restocking fee
    
                panel = new JPanel();
    
                panel.setLayout(new GridLayout(8, 2));
    
                // add labels to the panel
                panel.add(lblLogo);
                panel.add(lblName);
                panel.add(lbItemNumber);
                panel.add(lblNumberOfUnitsInStock);
                panel.add(lblManufacture);
                panel.add(lblPrice);
                panel.add(lblRestockingFee);
                panel.add(lblTotalInventory);
                
    
                return panel;
          } // end createLabelPanel method
    
          private JPanel createTextPanel()
          {
                //create instances of text box objects
                JLabel lblCompanyName1 = new JLabel("      Far North Skydive Center"); // label for company name
    
                nameField = new JTextField(); // name text field
                nameField.setEditable(false);  // set field to not editable to prevent user from changing the data
    
                itemNumberField = new JTextField(); // name text field
                itemNumberField.setEditable(false);  // set field to not editable to prevent user from changing the data
    
                numberOfUnitsInStockField = new JTextField(); // age text field
                numberOfUnitsInStockField.setEditable(false);  // set field to not editable to prevent user from changing the data
             
                manufactureField = new JTextField();   // manufacture text field
                manufactureField.setEditable(false);   // set field to not editable to prevent user from changing the data
    
                priceField = new JTextField();   // manufacture text field
                priceField.setEditable(false);   // set field to not editable to prevent user from changing the data
    
                
                restockingFeeField = new JTextField(); // restocking fee field
                restockingFeeField.setEditable(false);  // set field to not editable to prevent user from changing the data
    
                totalInventoryField = new JTextField();    // total inventory text field to sum the total of the manufacture's ages.
                totalInventoryField.setEditable(false);   // set field to not editable to prevent user from changing the data
    
    
                panel = new JPanel(); // create panel object
                panel.setLayout(new GridLayout(9, 2)); // create grid layout for fields.
    
                panel.add(lblCompanyName1);   // logo field
                panel.add(nameField); // add the name field to the grid layout
                panel.add(itemNumberField); // add the name field to the grid layout
                panel.add(numberOfUnitsInStockField); // add the units in stock field to the grid layout
                panel.add(manufactureField); // add the manufacture field to the grid layout
                panel.add(priceField); // add the manufacture field to the grid layout
                panel.add(restockingFeeField); // add the restock field to the grid layout
                panel.add(totalInventoryField); // add the total inventory field to the grid layout
                 
    
                return panel; // return the panel
    
          } // end createTextPanel method
            private void displayProduct() {
                       //totalInventoryField.setText(nf.format.computeRestockingFee.getValueOfInventory());
            if (ArrayIndex == -1) {
                // no product
                itemNumberField.setText(null);
                nameField.setText(null);
                manufactureField.setText(null);
                numberOfUnitsInStockField.setText(null);
                priceField.setText(null);
                restockingFeeField.setText(null);
                totalInventoryField.setText(null);
            } else {
                // get the product by its index
                Manufacture manufacture = (Manufacture) item[ArrayIndex];
                        //item[ArrayIndex];
                // update the fields
                itemNumberField.setText(String.valueOf(manufacture.getItemNumber()));
                nameField.setText(manufacture.getProductName());
                manufactureField.setText(manufacture.getManufacture());
                numberOfUnitsInStockField.setText(String.valueOf(manufacture.getNumberOfUnitsInStock()));
                priceField.setText(String.valueOf(nf.format(manufacture.getPriceOfUnit())));
                restockingFeeField.setText(String.valueOf(nf.format(manufacture.getRestockingFee())));
    
            }
            }
    
               // nested ButtonListener class
    
          class ButtonListener implements ActionListener
    
          {
    
                public void actionPerformed(ActionEvent e)
    
                {
    
                      // Parameters for the sort method are the girls array and an instance of my FirstNameComparator class
    
                      Arrays.sort(item, new FirstNameComparator()); // Sort the girls array
    
                      totalInventoryField.setText(String.valueOf(item[ArrayIndex].getValueOfInventory()));  // display the sum of the girl's age
    
    
    
                      Files file = new Files();  // instantiate th efiles
    
    
    
                      //add button functions
    
                      if (e.getActionCommand() == null ? "First" == null : e.getActionCommand().equals("First")) // if First button is clicked
    
                                  {
                          try {
                            ArrayIndex = 0;  // set the value of the array index
                            displayProduct();
                          }
    
                                                  catch (Exception ex)
    
                            {//Catch exception if any
    
    
    
                                  JOptionPane.showMessageDialog(null, "Error: " + ex.getMessage());  // catch errors that can occur
    
                            }
    
                      }
    
    
    
                      if (e.getActionCommand() == null ? "Next" == null : e.getActionCommand().equals("Next")) // if Next button is clicked
    
                     {
                          try {
                            ArrayIndex = ArrayIndex + 1;
                            displayProduct();
                          }
    
                                                  catch (Exception ex)
    
                            {//Catch exception if any
    
    
    
                                  JOptionPane.showMessageDialog(null, "Error: " + ex.getMessage());  // catch errors that can occur
    
                            }
    
                      }
    
    
    
    
                      if (e.getActionCommand() == null ? "Previous" == null : e.getActionCommand().equals("Previous")) // if Previous button is clicked
    
                 
    
                     {
                          try {
                            ArrayIndex = ArrayIndex - 1;
                            displayProduct();
                          }
    
                                                  catch (Exception ex)
    
                            {//Catch exception if any
    
    
    
                                  JOptionPane.showMessageDialog(null, "Error: " + ex.getMessage());  // catch errors that can occur
    
                            }
    
                      }
    
                      if (e.getActionCommand() == null ? "Last" == null : e.getActionCommand().equals("Last")) // if Last button is clicked
    
                     {
                          try {
                                                      ArrayIndex = 4;
                            displayProduct();
                          }
    
                                                  catch (Exception ex)
    
                            {//Catch exception if any
    
    
    
                                  JOptionPane.showMessageDialog(null, "Error: " + ex.getMessage());  // catch errors that can occur
    
                            }
    
                      }
    
    
                      if (e.getActionCommand() == null ? "Add" == null : e.getActionCommand().equals("Add")) // if Add button is clicked
                     {
                          try {
                              // code here
                          }
    
                                                  catch (Exception ex)
    
                            {//Catch exception if any
    
    
    
                                  JOptionPane.showMessageDialog(null, "Error: " + ex.getMessage());  // catch errors that can occur
    
                            }
    
                      }
    
    
                      if (e.getActionCommand() == null ? "Delete" == null : e.getActionCommand().equals("Delete")) // if Delete button is clicked
                     {
                          try {
                              // code here
                          }
    
                                                  catch (Exception ex)
    
                            {//Catch exception if any
    
    
    
                                  JOptionPane.showMessageDialog(null, "Error: " + ex.getMessage());  // catch errors that can occur
    
                            }
    
                      }
    
    
                      if (e.getActionCommand() == null ? "Modify" == null : e.getActionCommand().equals("Modify")) // if Modify button is clicked
    
                     {
                          try {
                              // code here
                          }
    
                                                  catch (Exception ex)
    
                            {//Catch exception if any
    
    
    
                                  JOptionPane.showMessageDialog(null, "Error: " + ex.getMessage());  // catch errors that can occur
    
                            }
    
                      }
    
    
                      if (e.getActionCommand() == null ? "Search" == null : e.getActionCommand().equals("Search")) // if Search button is clicked
    
                      {
                          try {
                              // code here
                          }
    
                                                  catch (Exception ex)
    
                            {//Catch exception if any
    
    
    
                                  JOptionPane.showMessageDialog(null, "Error: " + ex.getMessage());  // catch errors that can occur
    
                            }
    
                      }
    
    
    
                      if (e.getActionCommand() == null ? "Save" == null : e.getActionCommand().equals("Save")) // if Save button is clicked
    
                      {
    
                            try
    
                            {
    
                                  file.appendToFile(item[ArrayIndex].getProductName());
    
                                  file.appendToFile(", ");
    
                                  file.appendToFile(String.valueOf(item[ArrayIndex].getPriceOfUnit()));
    
                                  file.appendToFile(", ");
    
                                  file.appendToFile(item[ArrayIndex].getManufacture());
    
                                  file.appendToFile(", ");
    
                                  file.appendToFile(String.valueOf(item[ArrayIndex].getTotalInventory()));
    
                                  file.appendToFile(", ");
    
                                  JOptionPane.showMessageDialog(null, item[ArrayIndex].getProductName() + " has been saved to the file.");  // message indicating the file has been saved
    
                            }
    
                            catch (Exception ex)
    
                            {//Catch exception if any
    
    
    
                                  JOptionPane.showMessageDialog(null, "Error: " + ex.getMessage());  // catch errors that can occur
    
                            }
    
    
    
                      }  // end if
    
    
    
                } // end actionPerformed
    
    
    
    
    
          } // end class ButonListerner
    } // end FrameHelperClass

  2. #2
    Norm's Avatar
    Norm is offline Moderator
    Join Date
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    SW Missouri
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    Default

    I am not having luck
    I assume there are no errors.
    Sounds like you have a logic problem that you need to debug.
    Have you tried debugging your code to show execution flow and variables as their values change by adding println() statements to the code?
    Java Code:
    if (e.getActionCommand() == null ? "First" == null : e.getActionCommand().equals("First")) // if First button is clicked
    This is an unusual way to find the object that caused the action event.
    One way is to compare the e.getSource() value with a reference to the object.

    With the way you've coded it, there are four places in your code where you have typed in the String "First" and all other Button labels. If you mistype any one of them the code fails. There is no way for the compiler to test if you have misspelled a literal. It would be better to use a final String with the value of "First" and use a reference to it in the four places it needs to be. Then the compiler will catch any misspellings.


    You have several private packages so no one can run your code.

  3. #3
    Join Date
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    Default

    Here is the rest of the code. This is for a class I am in and I am really new at Java. I am having a hard time with the way the my teacher wants us to put the code together. It doesn't flow with me and others keep asking why I am coding this way. Any help would be great thanks.

    Java Code:
    package frameviewer;
    
    /** Program:    InventoryProgram
     *  File:       FrameViewer.java
     *  Summary:    Inherits JFrame class to build a window application that contains labels and text fields.
     *  Author:     Shannon Jardine
     *  Date:       July 25, 2010
     **/
    
    import framehelper.FrameHelper; //Import the frame helper class
    import javax.swing.JFrame;
    
    public class FrameViewer
    {
          public static void main(String[] args)
          {
                JFrame frame = new FrameHelper(); // creat a frame object
                frame.setSize(400, 450); // set the size of the window - 400 is width, 200 is height
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // close the application
                frame.setTitle("My Inventory Application"); // set the title of the window
                frame.setLocationRelativeTo( null );  // center the form
                frame.setVisible(true); // display form
          } // end main
    } // end class
    Java Code:
    package Item;
    /** Program:    InventoryProgram
     *  File:       item.java
     *  Summary:    Methods for the items reside in this class.
     *              Set and Get Products
     *  Author:     Shannon Jardine
     *  Date:       July 25, 2010
     **/
    import java.text.NumberFormat;  // import Java package used to format currency
    public class Item {//Begin Item Class
    
            NumberFormat nf = NumberFormat.getCurrencyInstance();  // used to format currency
            private int itemNumber; // Variable to hold item number
            private String productName; //Variable to hold product name
            private int numberOfUnitsInStock; //Variable to holds number of units in stock
            private double priceOfUnit; //Variable to holds price of units
            private static double valueOfInventory;//Variable to holds value of inventory per item
            private  static double totalInventory;//Variable to holds inventory value
            
              public Item(){} // empty constructor
    
              public Item( int itemNumberIn, String productNameIn, int numberOfUnitsInStockIn, double priceOfUnitIn)
          {
                this.setItemNumber(itemNumberIn); // call the setItemNumber
                this.setProductName(productNameIn);   // call the setProductName
                this.setNumberOfUnitsInStock(numberOfUnitsInStockIn);   // call the setNumberofUnits
                this.setPriceOfUnit(priceOfUnitIn);   // call the setPriceOfUnit
          } // end Item Constructor
    
    public int getItemNumber( )
    {
           return this.itemNumber;
    }//end getItemNumber method
    
    
    public  void setItemNumber(int itemNumberIn)
    {
        itemNumber = itemNumberIn;
    }//end setItemNumber method
    
    public  String getProductName( )
    {
           return this.productName;
    }//end getProductName method
    
    public  void setProductName(String productNameIn)
    {
           productName = productNameIn;
    }//end setProductName method
    
    public  int getNumberOfUnitsInStock( )
    {
           return this.numberOfUnitsInStock;
    }//end getNumberOfUnitsInStock method
    
    public  void setNumberOfUnitsInStock(int numberOfUnitsInStockIn)
    {
           numberOfUnitsInStock = numberOfUnitsInStockIn;
    }//end setNumberOfUnitsInStock method
    
    public  double getPriceOfUnit( )
    {
           return this.priceOfUnit;
    }//end getPriceOfUnit method
    
    public  void setPriceOfUnit(double priceOfUnitIn)
    {
           priceOfUnit = priceOfUnitIn;
    }//end setPriceOfUnit method
    
    public double getValueOfInventory()
        {
             return this.priceOfUnit * numberOfUnitsInStock;
        }//end getValueOfInventory method
    
    
    public double getTotalInventory()
          {
                return totalInventory; // get the value of the sum of each Items object's value.
          } // end getTotalInventory method
    
    public void getSumOfInventory(double inValue)
          {// Sum value o getSumOfInventoryf inventory
                totalInventory = totalInventory + inValue;
          }//end getSumOfInventory Method
    /*@Override
        public String toString() {
        String itemStr = String.format("%-2s | ", itemNumber);
        String titleStr = String.format("%-20s | ", productName);
        String unitsStr = String.format("%4d | ", numberOfUnitsInStock);
        String costStr = String.format("$ %6.2f | ", priceOfUnit);
        String valueStr = String.format("$ %8.2f", getTotalInventory());
    
        return itemStr + titleStr + unitsStr + costStr + valueStr;
        }*/
    
    
    }// End of Item Class
    Java Code:
    package files;
    
    /** Program:    GUI FORM Program
    
      * File:       Files.java
    
      * Summary:    This class contains one method that creates a file that does not exist and another method that creates and appends data to a file that does exist.
    
     *              Both methods use file exception handling to catch errors.
    
      * Author:     Lisa A. Hebert
    
      * Date:       December 13, 2009
    
     **/
    
    
    
    
    
    import java.io.*;  // import Java class library required to work with files.
    
    import javax.swing.JOptionPane;  // import JOptionPane required to use message dialog box.
    
    
    
    public class Files
    
    {
    
    
    
    
    
          // create a file
    
          public void createFile()throws IOException
    
          {
    
    
    
                File dataFile;  // declare file
    
                dataFile = new File("c:\\outputFile.dat");  // create instance of new file
    
                if (!dataFile.exists())
    
                {  // if file does not exist
    
                      dataFile.createNewFile();  // create the file
    
                      JOptionPane.showMessageDialog(null, "New file \"c:\\outputFile.dat\" has been created to the c directory.");
    
                }
    
                else
    
                {
    
                      JOptionPane.showMessageDialog(null, "The specified file already exists.");
    
                }
    
          }  // end Create File
    
    
    
    
    
    
    
          public void appendToFile(String inData)
    
          {
    
                try
    
                {
    
    
    
                      FileWriter fstream = new FileWriter("c:\\outputFile.dat", true);  // create file if it does not exist and append data.  If the file exists, append data
    
                      BufferedWriter outputFile = new BufferedWriter(fstream);  // declare output file
    
                      outputFile.write(inData);  // append  text to output file
    
                      //Close the output stream
    
                      outputFile.close();  // close the file
    
                } // end try
    
    
                catch (Exception e)
    
                {//Catch exception if any
    
                      JOptionPane.showMessageDialog(null, "Error: " + e.getMessage());  // catch errors that can occur
    
    
    
                } // end catch
    
          }
    
    }  // end class Files
    Java Code:
    /** Program:    InventoryProgram
     *  File:       FirstNameComparator.java
     *  Summary:    sorts array
     *  Author:     Shannon Jardine
     *  Date:       July 25, 2010
     **/
    
    package firstnamecomparator;
    
    import Item.Item; //Import Item class
    import java.util.Comparator; // you must import the Comparator class.
    
    public class FirstNameComparator implements Comparator
    {
    
       public int compare(Object itemOne, Object itemTwo)  // createing two Item objects to compare first names.
    
          {
    
    
    
                String firstName1 = ((Item)itemOne).getProductName().toUpperCase(); // getProductName is a method in my Item class.  Since the FirstNameComparator class inherits the Item class, it is availabe via the item object.
    
                String firstName2 = ((Item)itemTwo).getProductName().toUpperCase();
    
    
    
                // compare firstname of my Item object 1 with the first name of Items object 2
    
                if (!(firstName1.equals(firstName2)))
    
                      return firstName1.compareTo(firstName2);
    
                else
    
                      return firstName2.compareTo(firstName1);
    
    
    
    
    
          }  // end compare method
    
    
    
    }  // end FirstNameComparator class
    Java Code:
    /** Program:    InventoryProgram
     *  File:       Manufacture.java
     *  Summary:    Sub Class of Item Class. Adds a manufacture and restocking fee
     *  Author:     Shannon Jardine
     *  Date:       July 25, 2010
     **/
    package manufacture;
    
    import Item.Item;
    //import InventoryProgram.InventoryProgram;
    public class Manufacture extends Item  
    {//begin Manufacture class
        private String manufacture; // Manufacture of product
        private double restockFee = .05; //
    
    
        public void setManufacture(String manufactureIn)
        {
            this.manufacture = manufactureIn; //Set Manufacture
        }
    
        public String getManufacture()
        {
            return manufacture; // Get Manufacture
        }
    
        public double getRestockingFee()
        {
            return restockFee;
        }
        public double computeRestockingFee(double valueOfInventoryIn)
        {
           return super.getValueOfInventory() + (getValueOfInventory() * restockFee);
        }
    
    
    
    
    }//End Manufacture Class

  4. #4
    Norm's Avatar
    Norm is offline Moderator
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    You need to learn how to debug your code and understand how it executes.
    Have you tried adding some println() statements to the code to show where the code is executing and what the values of variables are.

    Did you read and understand my previous post about your code?

  5. #5
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    I read but fully understand no. I am reading more and more trying to get it all figured out i will try to Debug and see if I can figure that out.

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