Inventory program

[twin2003]

how do i get my program to add,delete and save? i could use help asap thanks i will work on my code if i get to work ill let you all know here is what i have so far

// created by Nicholas Baatz on July 24,2007
 import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
 
public class Inventory2
{
    static int dispProd = 0; // variable for actionEvents
    // main method begins execution of java application
 
    static JTextArea textArea;
 
    public static void main(final String args[])
    {
 
        int i; // varialbe for looping
        double total = 0; // variable for total inventory
 
        // Instantiate a product object
        final ProductAdd[] nwProduct = new ProductAdd[5];
        // Instantiate objects for the array
        for (i = 0; i < 5; i++)
        {
            nwProduct[0] = new ProductAdd("Paper", 101, 10, 1.00, "Box");
            nwProduct[1] = new ProductAdd("Pen", 102, 10, 0.75, "Pack");
            nwProduct[2] = new ProductAdd("Pencil", 103, 10, 0.50, "Pack");
            nwProduct[3] = new ProductAdd("Staples", 104, 10, 1.00, "Box");
            nwProduct[4] = new ProductAdd("Clip Board", 105, 10, 3.00,
                    "Two Pack");
        }
 
        for (i = 0; i < 5; i++)
            total += nwProduct.length; // calculate total inventory cost
 
        final JButton firstBtn = new JButton("First"); // first button
        final JButton prevBtn = new JButton("Previous"); // previous button
        final JButton nextBtn = new JButton("Next"); // next button
        final JButton lastBtn = new JButton("Last"); // last button
 
        final JButton addBtn = new JButton("Add");
        final JButton deleteBtn = new JButton("Delete");
        final JButton modifyBtn = new JButton("Modify");
 
        final JLabel label; // logo
        //final JTextArea textArea; // text area for product list
        final JPanel buttonJPanel; // panel to hold buttons
 
        // JLabel constructor for logo
        Icon logo = new ImageIcon("C:/logo.jpg"); // load logo
        label = new JLabel(logo); // create logo label
        label.setToolTipText("Company Logo"); // create tooltip
 
        buttonJPanel = new JPanel(); // set up panel
        buttonJPanel.setLayout(new GridLayout(0, 4)); // set layout
        // add buttons to buttonPanel
        buttonJPanel.add(firstBtn);
        buttonJPanel.add(prevBtn);
        buttonJPanel.add(nextBtn);
        buttonJPanel.add(lastBtn);
 
        buttonJPanel.add(addBtn);
        buttonJPanel.add(deleteBtn);
        buttonJPanel.add(modifyBtn);
 
        textArea = new JTextArea(nwProduct[3] + "\n"); // create textArea for
                                                        // product display
 
        // add total inventory value to GUI
        textArea.append("\nTotal value of Inventory "
                + new java.text.DecimalFormat("$0.00").format(total) + "\n\n");
        textArea.setEditable(false); // make text uneditable in main display
        JFrame invFrame = new JFrame(); // create JFrame container
        invFrame.setLayout(new BorderLayout()); // set layout
        invFrame.getContentPane().add(new JScrollPane(textArea),
                BorderLayout.CENTER); // add textArea to JFrame
        invFrame.getContentPane().add(buttonJPanel, BorderLayout.SOUTH); // add
                                                                            // buttons
                                                                            // to
                                                                            // JFrame
        invFrame.getContentPane().add(label, BorderLayout.NORTH); // add logo
                                                                    // to JFrame
        invFrame.setTitle("Office Min Inventory"); // set JFrame title
        invFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // termination
                                                                    // command
        // invFrame.pack();
        invFrame.setSize(400, 400); // set size of JPanel
        invFrame.setLocationRelativeTo(null); // set screem location
        invFrame.setVisible(true); // display window
 
        // assign actionListener and actionEvent for each button
        firstBtn.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent ae)
            {
                dispProd = 0;
                textArea.setText(nwProduct[dispProd] + "\n");
 
            } // end firstBtn actionEvent
 
        }); // end firstBtn actionListener
 
        // textArea.setText(nwProduct[4]+"n");
 
        prevBtn.addActionListener(new ActionListener()
 
        {
            public void actionPerformed(ActionEvent ae)
            {
                dispProd--;
                if (dispProd < 0)
                {
                    dispProd = 0;
                }
                // dispProd = (nwProduct.length+dispProd-1) % nwProduct.length;
                textArea.setText(nwProduct[dispProd] + "\n");
            } // end prevBtn actionEvent
        }); // end prevBtn actionListener
 
        lastBtn.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent ae)
            {
                dispProd = nwProduct.length - 1;
                textArea.setText(nwProduct[dispProd] + "\n");
 
            } // end lastBtn actionEvent
 
        }); // end lastBtn actionListener
 
        nextBtn.addActionListener(new ActionListener()
 
        {
            public void actionPerformed(ActionEvent ae)
            {
                dispProd++;
                if (dispProd >= nwProduct.length)
                {
                    dispProd = nwProduct.length - 1;
                }
                textArea.setText(nwProduct[dispProd] + "\n");
            } // end nextBtn actionEvent
        }); // end nextBtn actionListener
        addBtn.addActionListener(new extraBtnAxnL());
        deleteBtn.addActionListener(new extraBtnAxnL());
        modifyBtn.addActionListener(new extraBtnAxnL());
 
    } // end main
 
    static class extraBtnAxnL implements ActionListener
    {
 
        public void actionPerformed(ActionEvent arg0)
        {
            mybtnAction(arg0, null);
        }
    }
 
    private static void mybtnAction(ActionEvent arg0, String stock) 
    {
        String axnCmd = arg0.getActionCommand();
        Font oldFont = textArea.getFont();
        textArea.setFont(new Font(oldFont.getName(), Font.BOLD, 16));
        if (axnCmd.equalsIgnoreCase("add"))
        {
            textArea.setText(new String(  ));
        }
        else if (axnCmd.equalsIgnoreCase("delete"))
        {
            textArea.setText(new String());
        }
        else if (axnCmd.equalsIgnoreCase("modify"))
        {
            textArea.setText(new String());
        }
    }
 
 
    };
 
 // end class Inventory2
 
 
class Product
{
protected String prodName; // name of product
protected int itmNumber; // item number
protected int units; // number of units
protected double price; // price of each unit
protected double value; // value of total units
 
 
public Product(String name, int number, int unit, double each) // Constructor for class Product
{
prodName = name;
itmNumber = number;
units = unit;
price = each;
 
} // end constructor
 
public void setProdName(String name) // method to set product name
{
prodName = name;
}
 
public String getProdName() // method to get product name
{
return prodName;
}
 
public void setItmNumber(int number) // method to set item number
{
itmNumber = number;
}
 
public int getItmNumber() // method to get item number
{
return itmNumber;
}
 
public void setUnits(int unit) // method to set number of units
{
units = unit;
}
 
public int getUnits() // method to get number of units
{
return units;
}
 
public void setPrice(double each) // method to set price
{
price = each;
}
 
public double getPrice() // method to get price
{
return price;
}
 
public double calcValue() // method to set value
{
return units * price;
}
 
 
 
} // end class Product
 
 
 
class ProductAdd extends Product
{
private String feature; // variable for added feature
 
 
public ProductAdd(String name, int number, int unit, double each, String addFeat)
{
// call to superclass Product constructor
super(name, number, unit, each);
 
feature = addFeat;
}// end constructor
 
public void setFeature(String addFeat) // method to set added feature
{
feature = addFeat;
}
 
public String getFeature() // method to get added feature
{
return feature;
}
 
public double calcValueRstk() // method to set value and add restock fee
{
return units * price * 0.05;
}
 
public String toString()
{
return String.format("Product: %s\nItem Number: %d\nIn Stock: %d\nPrice: $%.2f\nType: %s\nTotal Value of Stock: $%.2f\nRestock Cost: $%.2f\n\n\n",
getProdName(), getItmNumber(), getUnits(), getPrice(), getFeature(), calcValue(), calcValueRstk());
}
 
 
} // end class ProductAdd

[Nepomuk]

First of all, everything, which should be done after any Products were added (both the initial Products as any added by the user) shoud be moved into a seperate function. (Example: Calculating overall value.)

Then you have to write a listener for the add button, which can change the Collection of Products, which you allready have. I can see two possibilities right now:

1. You read out the size of the current Array (nwProduct.size) and then create a new Array, which is one bigger. Then copy all Products from the current Array to the new Array and add the one, which should be created.
2. You use a Vector instead of an Array. Then you won't need all that copying, just say nwProduct.add(...) (nwProduct now being a Vector instead of an Array). When acessing it, you might have to cast the element (which you access with nwProduct.elementAt(i)) to a Product, but that's the least Problem, I would think.

[twin2003]

im not quite fowining you on this im new to java but i think you mean make a class for it the set atvie listners?

[Nepomuk]

im not quite fowining you on this im new to java but i think you mean make a class for it the set atvie listners?

No, I don't. Here's what I mean, shown with an example of how to add a product:

// created by Nicholas Baatz on July 24,2007
import java.util.Vector;
 
import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
 
public class Inventory2
{
    static int dispProd = 0; // variable for actionEvents
    // main method begins execution of java application
 
    static JTextArea textArea;
 
    public static int totalCost(Vector<ProductAdd> nwProduct)
    {
    int total = 0;
        for (int i = 0; i < 5; i++)
            total += nwProduct.size(); // calculate total inventory cost
    return total;
 
    }
 
    public static void main(final String args[])
    {
 
        int i; // varialbe for looping
        double total = 0; // variable for total inventory
 
        // Instantiate a product object
        final Vector<ProductAdd> nwProduct = new Vector<ProductAdd>();
        // Instantiate objects for the array
        nwProduct.add(new ProductAdd("Paper", 101, 10, 1.00, "Box"));
        nwProduct.add(new ProductAdd("Pen", 102, 10, 0.75, "Pack"));
        nwProduct.add(new ProductAdd("Pencil", 103, 10, 0.50, "Pack"));
        nwProduct.add(new ProductAdd("Staples", 104, 10, 1.00, "Box"));
        nwProduct.add(new ProductAdd("Clip Board", 105, 10, 3.00,
                "Two Pack"));
 
        total += totalCost(nwProduct);
 
        final JButton firstBtn = new JButton("First"); // first button
        final JButton prevBtn = new JButton("Previous"); // previous button
        final JButton nextBtn = new JButton("Next"); // next button
        final JButton lastBtn = new JButton("Last"); // last button
 
        final JButton addBtn = new JButton("Add");
        final JButton deleteBtn = new JButton("Delete");
        final JButton modifyBtn = new JButton("Modify");
 
        final JLabel label; // logo
        //final JTextArea textArea; // text area for product list
        final JPanel buttonJPanel; // panel to hold buttons
 
        // JLabel constructor for logo
        Icon logo = new ImageIcon("C:/logo.jpg"); // load logo
        label = new JLabel(logo); // create logo label
        label.setToolTipText("Company Logo"); // create tooltip
 
        buttonJPanel = new JPanel(); // set up panel
        buttonJPanel.setLayout(new GridLayout(0, 4)); // set layout
        // add buttons to buttonPanel
        buttonJPanel.add(firstBtn);
        buttonJPanel.add(prevBtn);
        buttonJPanel.add(nextBtn);
        buttonJPanel.add(lastBtn);
 
        buttonJPanel.add(addBtn);
        buttonJPanel.add(deleteBtn);
        buttonJPanel.add(modifyBtn);
 
        textArea = new JTextArea(nwProduct.elementAt(3) + "\n"); // create textArea for
                                                        // product display
 
        // add total inventory value to GUI
        textArea.append("\nTotal value of Inventory "
                + new java.text.DecimalFormat("$0.00").format(total) + "\n\n");
        textArea.setEditable(false); // make text uneditable in main display
        JFrame invFrame = new JFrame(); // create JFrame container
        invFrame.setLayout(new BorderLayout()); // set layout
        invFrame.getContentPane().add(new JScrollPane(textArea),
                BorderLayout.CENTER); // add textArea to JFrame
        invFrame.getContentPane().add(buttonJPanel, BorderLayout.SOUTH); // add
                                                                            // buttons
                                                                            // to
                                                                            // JFrame
        invFrame.getContentPane().add(label, BorderLayout.NORTH); // add logo
                                                                    // to JFrame
        invFrame.setTitle("Office Min Inventory"); // set JFrame title
        invFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // termination
                                                                    // command
        // invFrame.pack();
        invFrame.setSize(400, 400); // set size of JPanel
        invFrame.setLocationRelativeTo(null); // set screem location
        invFrame.setVisible(true); // display window
 
        // assign actionListener and actionEvent for each button
        firstBtn.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent ae)
            {
                dispProd = 0;
                textArea.setText(nwProduct.elementAt(dispProd) + "\n");
 
            } // end firstBtn actionEvent
 
        }); // end firstBtn actionListener
 
        // textArea.setText(nwProduct.elementAt(4)+"n");
 
        prevBtn.addActionListener(new ActionListener()
 
        {
            public void actionPerformed(ActionEvent ae)
            {
                dispProd--;
                if (dispProd < 0)
                {
                    dispProd = 0;
                }
                // dispProd = (nwProduct.size()+dispProd-1) % nwProduct.size();
                textArea.setText(nwProduct.elementAt(dispProd) + "\n");
            } // end prevBtn actionEvent
        }); // end prevBtn actionListener
 
        lastBtn.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent ae)
            {
                dispProd = nwProduct.size() - 1;
                textArea.setText(nwProduct.elementAt(dispProd) + "\n");
 
            } // end lastBtn actionEvent
 
        }); // end lastBtn actionListener
 
        nextBtn.addActionListener(new ActionListener()
 
        {
            public void actionPerformed(ActionEvent ae)
            {
                dispProd++;
                if (dispProd >= nwProduct.size())
                {
                    dispProd = nwProduct.size() - 1;
                }
                textArea.setText(nwProduct.elementAt(dispProd) + "\n");
            } // end nextBtn actionEvent
        }); // end nextBtn actionListener
 
        addBtn.addActionListener(new ActionListener()
 
    {
            public void actionPerformed(ActionEvent ae)
            {
        // Read in Information about the new Product
        String prodName = "Folder";
        int itmNumber = 42;
        int units = 20;
        double price = 0.89;
        double value = 1.88;
        String addFeat = "Two Pack";
        // create new ProductAdd and add it to the Vector
        nwProduct.add(new ProductAdd(prodName, itmNumber, units, price, addFeat));
        total = totalCost(nwProduct);
        }
    });
        deleteBtn.addActionListener(new extraBtnAxnL());
        modifyBtn.addActionListener(new extraBtnAxnL());
 
    } // end main
 
    static class extraBtnAxnL implements ActionListener
    {
 
        public void actionPerformed(ActionEvent arg0)
        {
            mybtnAction(arg0, null);
        }
    }
 
    private static void mybtnAction(ActionEvent arg0, String stock) 
    {
        String axnCmd = arg0.getActionCommand();
        Font oldFont = textArea.getFont();
        textArea.setFont(new Font(oldFont.getName(), Font.BOLD, 16));
        if (axnCmd.equalsIgnoreCase("add"))
        {
            textArea.setText(new String(  ));
        }
        else if (axnCmd.equalsIgnoreCase("delete"))
        {
            textArea.setText(new String());
        }
        else if (axnCmd.equalsIgnoreCase("modify"))
        {
            textArea.setText(new String());
        }
    }
 
 
    };
 
 // end class Inventory2
 
 
class Product
{
    protected String prodName; // name of product
    protected int itmNumber; // item number
    protected int units; // number of units
    protected double price; // price of each unit
    protected double value; // value of total units
 
 
    public Product(String name, int number, int unit, double each) // Constructor for class Product
    {
        prodName = name;
        itmNumber = number;
        units = unit;
        price = each;
 
    } // end constructor
 
    public void setProdName(String name) // method to set product name
    {
        prodName = name;
    }
 
    public String getProdName() // method to get product name
    {
        return prodName;
    }
 
    public void setItmNumber(int number) // method to set item number
    {
        itmNumber = number;
    }
 
    public int getItmNumber() // method to get item number
    {
        return itmNumber;
    }
 
    public void setUnits(int unit) // method to set number of units
    {
        units = unit;
    }
 
    public int getUnits() // method to get number of units
    {
        return units;
    }
 
    public void setPrice(double each) // method to set price
    {
        price = each;
    }
 
    public double getPrice() // method to get price
    {
        return price;
    }
 
    public double calcValue() // method to set value
    {
        return units * price;
    }
 
} // end class Product
 
 
class ProductAdd extends Product
{
    private String feature; // variable for added feature
 
 
    public ProductAdd(String name, int number, int unit, double each, String addFeat)
    {
        // call to superclass Product constructor
        super(name, number, unit, each);
 
        feature = addFeat;
    }// end constructor
 
    public void setFeature(String addFeat) // method to set added feature
    {
        feature = addFeat;
    }
 
    public String getFeature() // method to get added feature
    {
        return feature;
    }
 
    public double calcValueRstk() // method to set value and add restock fee
    {
        return units * price * 0.05;
    }
 
    public String toString()
    {
        return String.format("Product: %s\nItem Number: %d\nIn Stock: %d\nPrice: $%.2f\nType: %s\nTotal Value of Stock: $%.2f\nRestock Cost: $%.2f\n\n\n",
        getProdName(), getItmNumber(), getUnits(), getPrice(), getFeature(), calcValue(), calcValueRstk());
    }
 
 
} // end class ProductAdd