[crazydeo]

Code:

import javax.swing.*;
import javax.swing.JTextField;
import java.awt.event.*;
import java.text.*;
import java.awt.*;
 
public class Main extends JFrame implements ActionListener 
{
    // All the GUI objects
    JPanel mainPanel = new JPanel();
    JLabel storeLabel = new JLabel("       OrderBook INC.         ");
    JTextField bookNameTextField = new JTextField(20);
    JTextField quantityTextField = new JTextField(20);
    JTextField priceTextField = new JTextField(20);
    JButton calculateButton = new JButton(" Calculate   ");
    JTextArea outputTextArea = new JTextArea("Books Ordered", 10, 25);
    JScrollPane outputScrollPane = new JScrollPane(outputTextArea);
        
    //object of the font
    Font storeFont = new Font("Arial",Font.BOLD,14);
          
    public static void main(String[] args) 
    {
        //create an object of the class and code the close button
        Main myBooks = new Main();
        myBooks.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        
    }
    
    public Main() 
    {
        designFrame();
        
    }
    
    public void designFrame() 
    {
        //set the font and the color
        storeLabel.setFont(storeFont);
        storeLabel.setForeground(Color.GRAY);
    
        //add the components to the mainPanel
        mainPanel.add(storeLabel);
        mainPanel.add(new JLabel("       Book Name            "));
        mainPanel.add(bookNameTextField);
        mainPanel.add(new JLabel("    Quantity Ordered   "));
        mainPanel.add(quantityTextField);
        mainPanel.add(new JLabel("    Price       "));
        mainPanel.add(priceTextField);
        mainPanel.add(calculateButton);
        mainPanel.add(outputScrollPane);
        
        //add the listeners
        priceTextField.addActionListener(this);
        calculateButton.addActionListener(this);
                
        //add the panel to the frame
        add(mainPanel);
        setSize(300,400);
        setVisible(true);
    }
    
    public void actionPerformed(ActionEvent evt)
    
    {
        getInput();
        clear();        
    
    }
    
    //declaring local variables    	
	double quantityDouble, priceDouble;
	Calculation myOrder;
	String nameString;

    public void getInput() 
    {  	         	
        // get input
        quantityDouble = Double.parseDouble(quantityTextField.getText());
        priceDouble = Double.parseDouble(priceTextField.getText());
        nameString = bookNameTextField.getText();
    
        //send the input the calculation class
        myOrder = new Calculation(quantityDouble, priceDouble);
        displayOutput(myOrder.getQuantity());
    }
    
    public void displayOutput(double CalculationDouble) 
    {
        //object to format to currency
        DecimalFormat formatDecimalFormat = new DecimalFormat("$0.00");
        DecimalFormat formatNumberFormat = new DecimalFormat("0");
        //variables to store the retrieved values from the calculation class
        double priceDouble, subTotalDouble, shippingDouble, taxDouble, totalDouble, 
        grandTotalDouble;
        int totalNumberOfOrdersInteger;
                
        priceDouble = myOrder.getPrice();
        subTotalDouble = myOrder.getSubTotal();
        shippingDouble = myOrder.getShipping();
        taxDouble = myOrder.getTax();
        totalDouble = myOrder.getTotal();
        grandTotalDouble = myOrder.getGrandTotal();
        totalNumberOfOrdersInteger = myOrder.getNumberOfOrders();
        
        //display output
        outputTextArea.append('\n' + "Name of the Book: " + nameString + '\n' + 
        		"Quantity Ordered: " + formatNumberFormat.format(quantityDouble)
        		+ '\n' + "Price: 	" + formatDecimalFormat.format(priceDouble)+ '\n'
        		+ '\n' + "Subtotal: 	" + formatDecimalFormat.format(subTotalDouble)
        		+ '\n' + "Shipping: 	" + formatDecimalFormat.format(shippingDouble)
        		+ '\n' + "Tax: 	" + formatDecimalFormat.format(taxDouble) + '\n'+ 
        		"Total:	" +	formatDecimalFormat.format(totalDouble) + '\n' +'\n' + 
        		"Total Quantity To-Date: " + totalNumberOfOrdersInteger + '\n' + 
        		" Grand Total To-Date: " + formatDecimalFormat.format(grandTotalDouble)
        		+ '\n');      
    }
   
    public void  clear()
    {
    	//clear existing text from text fields and request cursor to top
    	bookNameTextField.setText("");
        quantityTextField.setText("");
        priceTextField.setText("");
        bookNameTextField.requestFocus();        
    }    
}

I orginally did it this way and everything worked, but was told that the object is not private