Campus store program,help!

Question

Hi Folks,
I have a probem with the following code. I am new to Java Programmimg. Can anybody help me please!
This application launches a window where the sales person can enter the items purchased. At the click of Next Item( b1), the screen is cleared to enter the next item and the transaction is processed. when receipt i(b2)s clicked, the details of the transactions are displayed. When summary button is clicked(b3) the details of the day's total transactions are displays. I have the following problems.
The title of the receipt is not displayed once the receipt textarea is cleared, but the transaction is displayed. I also stored the cost in a variable called Tcost (Tcost = Tcost + cost). I initilized Tcost = 0.0 It either displays the cost or 0.0 value but not the total cost. I am able to display the summary but when i click the 2nd time, it displays twice.
How do I calculate the total tax for the summary report and Cost and tax in receipt?
Please help!
Thanks.
import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.*;
import java.awt.*;
import java.util.*;
public class ProductFrame1 extends JFrame implements ActionListener
     private JLabel label;
     private JLabel label1;
     private JLabel label2;
     private JTextField text1;
     private JTextField text2;
     private JTextArea receipt;
     private JTextArea sum;
     private JButton b1;
     private JButton b2;
     private JButton b3;
     double summary[] = {0.0, 0.0, 0.0, 0.0, 0.0, 0.0};
     int prdcode[] = {100,200,300,400,500,600};
     String item[] = {"White Bandana ", "Green License Plate",
"Green Sweat Shirt ", "Low Profile hat ", "Gym Shorts ",
"Printed Golf Balls "};
     double unitprice[] = {4.98, 5.99, 24.99,17.98,16.98,8.99};
     double salestax [] = {0.0,3.5,7.2,4.0,4.2,0.0};
     public ProductFrame1()
          super( "CAMPUS STORE");
          setLayout( new FlowLayout
FlowLayout.CENTER,200,10));
          label = new JLabel("CAMPUS STORE");
          add(label);
          label1 = new JLabel("Product code:");
          add(label1);
          text1 = new JTextField( 3 );
          add(text1);
     label2 = new JLabel(" Quantity: ");
          add(label2);
          text2 = new JTextField( 4 );
          add(text2);
          b1 = new JButton("Next Item");
          add(b1);
          b2 = new JButton("Receipt");
          add(b2);
          b3 = new JButton("Summary");
          add(b3);     
          receipt = new JTextArea(20,35);
     receipt.append(" Campus Store Sales Receipt \n\n");
          receipt.append(" ItemName\t\tQuantity\tUnitPrice\tCost \n");
          sum = new JTextArea(20,35);
          sum.append(" Campus shop Daily Sales Summary \n\n");
          sum.append(" Items\t\t\tSales \n");
          //register event handlers
          text1.addActionListener( this );
          text2.addActionListener( this );
          b1.addActionListener( this );
          b2.addActionListener( this );
          b3.addActionListener( this );
     public int Search( int arr[], int key)
          for(int c=0; c<arr.length;c++)
               if(arr[c] == key)
               return c;
          return -1;
     public void actionPerformed( ActionEvent event )
          String string = "";     
          int row,qty1;     
          String rectotal;
          String output;
          double Tcost = 0.0;          
          double cost;
          double tax = 0.0;
          double total = 0.0;     
          if (event.getSource() == b1)
          row = Search( prdcode, Integer.parseInt(text1.getText()));
          qty1 = Integer.parseInt( text2.getText());
     cost = qty1* unitprice[row];
          //Tcost = Tcost + cost;
// accumulate receipt totals as well as summary total
     summary[row] = summary[row] + cost;
               //tax[row] = tax[row]
     receipt.append( item[row] + "\t" + qty1 + "\t" + unitprice[row] + "\t" + cost + "\n");
     //receipt.append("\t\t\t\t" + Double.toString(Tcost) + "\n");
          //tax = tax + salestax[row];
          text1.setText("");
          text2.setText("");     
          else
          if(event.getSource() == b2)
          receipt.append( "\t\t\t\t-----------\n");
          receipt.append( "\t\t\tTotal Tax \n");
          receipt.append( "\t\t\t\t-----------\n");
          receipt.append( "\t\t\tTotal \n");
// display receipt in JOptionPane
          JOptionPane.showMessageDialog(null, add(receipt));     
// clear textarea as well reset receiptotals = 0
          receipt.setText("");
          else
          if(event.getSource() == b3)
          // write the content of summary array to sum     
          for (int i=0;i<summary.length;i++)
          sum.append(item[i] + "\t" + "\t" + "%summary[i] + "\n");
          for (int j=0; j<summary.length;j++)
          total = total + summary[j];
          sum.append("--------------------------------------------------------------------------------\n");
          sum.append("Total Sales\t\t\t" + total +"\n");
          sum.append("Total Tax \t\t\t\n");
          sum.append("\t\t\t---------------\n");
          sum.append("Total \n");
          JOptionPane.showMessageDialog(null, add(sum));     }               
}

Answer 1

can you please repost your code withing code tags