Having homework issues again. This code compiles but when I try to execute it it gives me an "exception in thread main java.lang.nosuchmethoderror main"
Can anyone help me due tomorrow....Thanx
import java.awt.*;
import java.awt.event.*;
import java.text.NumberFormat; // used to format currency
import javax.swing.*;
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;
class InventoryMain implements ActionListener
{
CD[] product;
JTextField[] fields;
NumberFormat nf;
public void actionPerformed(ActionEvent e)
{
int index = ((JComboBox)e.getSource()).getSelectedIndex();
populateFields(index);
}
public static void main(String args[])
{
try
{
UIManager.setLookAndFeel(
"com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
}
catch (Exception e)
{
System.err.println(e.getClass().getName() + ": " + e.getMessage());
}
InventoryMain test = new InventoryMain();
test.initCD();
test.showGUI();
test.populateFields(0);
}
/**
*
*/
public void initCD() {
//Create an array
product = new CD[10];
//fill in the classes
product[0] = new CD( 1, "Crowbar" , 20.00, 10, "00722");
product[1] = new CD( 2, "Pantera" , 20.00, 10, "00263");
product[2] = new CD( 3, "Ozzy" , 15.00, 10, "00142");
product[3] = new CD( 4, "Soulfly" , 18.00, 10, "00553");
product[4] = new CD( 5, "Down", 24.00, 10, "00789");
product[5] = new CD( 6, "God Forbid" , 10.00, 10, "00712");
product[6] = new CD( 7, "Black Label Society" , 16.00, 10, "00458" );
product[7] = new CD( 8, "Saint Vitus" , 15.00, 10, "00889");
product[8] = new CD( 9, "Clearlight" , 15.00, 10, "00897");
product[9] = new CD( 10, "Testament" , 15.00, 10, "00656");
//Sort elements in array in alphabetical order by product name
// product[0].sortItems(product);
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 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
}
private void showGUI() {
JLabel l;
JButton b;
fields = new JTextField[9];
JComboBox combo = new JComboBox();
for(int j = 0; j < product.length; j++)
combo.addItem(product[j].getName());
combo.addActionListener(this);
JFrame f = new JFrame("InventoryGUI");
Container cp = f.getContentPane();
cp.setLayout(new GridBagLayout());
cp.setBackground(UIManager.getColor("control"));
GridBagConstraints c = new GridBagConstraints();
c.gridx = 0;
c.gridy = GridBagConstraints.RELATIVE;
c.gridwidth = 1;
c.gridheight = 1;
c.insets = new Insets(2, 2, 2, 2);
c.anchor = GridBagConstraints.EAST;
cp.add(l = new JLabel("Item Number:", SwingConstants.CENTER), c); l.setDisplayedMnemonic('a');
cp.add(l = new JLabel("Item Name:", SwingConstants.CENTER), c); l.setDisplayedMnemonic('b');
cp.add(l = new JLabel("Number of Units in Stock:", SwingConstants.CENTER), c); l.setDisplayedMnemonic('c');
cp.add(l = new JLabel("Price per Unit: $", SwingConstants.CENTER), c); l.setDisplayedMnemonic('d');
cp.add(l = new JLabel("Total cost of This Item: $", SwingConstants.CENTER), c); l.setDisplayedMnemonic('e');
cp.add(l = new JLabel("Total Value of All Merchandise in Inventory: $",
SwingConstants.CENTER), c); l.setDisplayedMnemonic('f');
cp.add(l = new JLabel("Item Code:", SwingConstants.CENTER), c); l.setDisplayedMnemonic('g');
cp.add(l = new JLabel("Product Restocking Fee: $", SwingConstants.CENTER), c); l.setDisplayedMnemonic('h');
cp.add(combo, c);
c.gridx = 1;
c.gridy = 0;
c.weightx = 1.0;
c.fill = GridBagConstraints.HORIZONTAL;
c.anchor = GridBagConstraints.CENTER;
cp.add(fields[0] = new JTextField(), c);
fields[0].setFocusAccelerator('a');
c.gridx = 1;
c.gridy = GridBagConstraints.RELATIVE;
cp.add(fields[1] = new JTextField(), c); fields[1].setFocusAccelerator('b');
cp.add(fields[2] = new JTextField(), c); fields[2].setFocusAccelerator('c');
cp.add(fields[3] = new JTextField(), c); fields[3].setFocusAccelerator('d');
cp.add(fields[4] = new JTextField(), c); fields[4].setFocusAccelerator('e');
cp.add(fields[5] = new JTextField(), c); fields[5].setFocusAccelerator('f');
cp.add(fields[6] = new JTextField(), c); fields[6].setFocusAccelerator('g');
cp.add(fields[7] = new JTextField(), c); fields[7].setFocusAccelerator('h');
cp.add(fields[8] = new JTextField(), c); fields[8].setFocusAccelerator('i');
c.weightx = 0.0;
c.fill = GridBagConstraints.NONE;
cp.add(b = new JButton("OK"), c);
cp.add(b = new JButton("First"),c); // set up panel
cp.add(b = new JButton("Prev"),c);
cp.add(b = new JButton("Next"),c);
cp.add(b = new JButton("Last"),c);
b.setMnemonic('o');
f.pack();
f.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent evt)
{
System.exit(0);
}
});
f.setVisible(true);
}
private void populateFields(int index) {
CD cd = product[index];
fields[0].setText(Long.toString(cd.getNumberCode()));
fields[1].setText(cd.getName());
fields[2].setText(Long.toString(cd.getUnits()));
fields[3].setText(Double.toString(cd.getPrice()));
fields[4].setText(Double.toString(cd.getSum()));
fields[5].setText(Double.toString(cd.totalAllInventory(product)));
fields[6].setText(cd.getCode());
fields[7].setText(Double.toString(cd.getSum()*.05));
}
}
class CD {
int itemNumber;
String name;
int units;
double price;
String itemCode;
public CD(int n, String name, double price, int units, String itemCo) {
itemNumber = n;
this.name = name;
this.price = price;
this.units = units;
itemCode = itemCo;
}
public int getNumberCode() { return itemNumber; }
public String getName() { return name; }
public int getUnits() { return units; }
public double getPrice() { return price; }
public double getSum() { return units*price; }
public String getCode() { return itemCode; }
public double totalAllInventory(CD[] cds) {
double total = 0;
for(int j = 0; j < cds.length; j++)
total += cds[j].getSum();
return total;
}
}
public class Inventory5 {
String productnumber;
String name;
int numberofunits;
double priceperunit;
String itemcode;
// Create a new instance of Inventory
// main constructor for the class
public Inventory5(String Item_Number, String Item_Name, int Items_in_Stock,
double Item_Price, String Item_Code) {
productnumber = Item_Number;
name = Item_Name;
numberofunits = Items_in_Stock;
priceperunit = Item_Price;
itemcode = Item_Code;
}
public void setItemName(String Item_Name) {
// sets the items name
name = Item_Name;
}
public void setItemCode(String Item_Code) {
// sets the items name
itemcode = Item_Code;
}
public void setItemNumber(String Item_Number) { // Sets the Product =Number
// for the item
productnumber = Item_Number;
}
public void setItemsInStock(int Items_in_Stock) { // sets the =number of
// units in stock
numberofunits = Items_in_Stock;
}
public void setItemPrice(double Item_Price) { // sets the price of =the
// item
priceperunit = Item_Price;
}
public String getItemName() { // returns the Product Name of this item
return name;
}
public String getItemCode() { // returns the Product Name of this item
return itemcode;
}
public String getItemNumber() { // returns the Product Number of the =item
return productnumber;
}
public int getItemsInStock() { // returns how many units are in stock
return numberofunits;
}
public double getItemPrice() { // returns the price of the item
return priceperunit;
}
public double getInventoryIValue() { // returns the total value of =the stock
// for this item
return priceperunit * numberofunits;
}
public static double getTotalValueOfAllInventory(Inventory5 [] inv) {
double tot = 0.0;
for(int i = 0; i < inv.length; i++)
tot += inv[i].getInventoryIValue();
return tot;
}
public static Inventory5[] sort(Inventory5 [] inventory)
{
Inventory5 temp[] = new Inventory5[1];
//sorting the array using Bubble Sort
for(int j = 0; j < inventory.length - 1; j++)
{
for(int k = 0; k < inventory.length - 1; k++)
{
if(inventory[k].getItemName().compareToIgnoreCase(inventory[k+1].getItemName()) > 0)
{
temp[0] = inventory[k];
inventory[k] = inventory[k+1];
inventory[k+1] = temp[0];
}//end if
}//end for loop
}//end for loop
return inventory;
}
public String toString()
{
StringBuffer sb = new StringBuffer();
sb.append("CD Title: \t").append(name).append("\n");
sb.append("Item Code: \t").append(itemcode).append("\n");
sb.append("Item #: \t").append(productnumber).append("\n");
sb.append("Number in stock:\t").append(numberofunits).append("\n");
sb.append("Price: \t").append(String.format("$%.2f%n", priceperunit));
sb.append("Inventory Value:\t").append(String.format("$%.2f%n", this.getInventoryIValue()));
return sb.toString();
}
}