Thread: Java program error in displaying Output

I've been working on this project all night and have been unsuccessful in getting the values to display in output. All I get once I push the calculate button are 0's for each of the values, but the total is summed up. Please point me in the right direction.

Thank you in advance!!!

import javax.swing.*;
import java.awt.event.*;
import java.text.*;
import java.awt.*;
 
public class Presentation extends JFrame implements ActionListener, ItemListener 
{
    // All the GUI objects
JPanel mainPanel = new JPanel();
JPanel discountPanel = new JPanel();
JLabel storeLabel = new JLabel("       OrderBook INC.         ");
JTextField bookNameTextField = new JTextField(20);
JTextField quantityTextField = new JTextField(20);
JRadioButton discountARadioButton = new JRadioButton(" A ");
    JRadioButton discountBRadioButton = new JRadioButton(" B ");
    JRadioButton discountCRadioButton = new JRadioButton(" C ");
    JRadioButton discountInvisibleRadioButton = new JRadioButton("");
    ButtonGroup discountButtonGroup = new ButtonGroup();
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
        Presentation myBooks = new Presentation();
        myBooks.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
    }
 
    public Presentation() 
    {
        designFrame();
        add(mainPanel);
        setTitle("OrderBook INC.");
        setSize(304,600);
        setVisible(true);        
    }
 
    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);
      //adding discount radio buttons to car radio button group 
      mainPanel.add(new JLabel("   Discount Type   "));
discountButtonGroup.add(discountARadioButton);
    discountButtonGroup.add(discountBRadioButton);
    discountButtonGroup.add(discountCRadioButton);
    discountButtonGroup.add(discountInvisibleRadioButton);
    //adding radio buttons to panel
    mainPanel.add(discountARadioButton);
    mainPanel.add(discountBRadioButton);
    mainPanel.add(discountCRadioButton);
      priceTextField.setEditable(false);
calculateButton.setEnabled(false);
      mainPanel.add(new JLabel("    Price       "));
      mainPanel.add(priceTextField);
      mainPanel.add(calculateButton);
      mainPanel.add(outputScrollPane);
 
      //add the listeners
      priceTextField.addActionListener(this);
      calculateButton.addActionListener(this);
      discountARadioButton.addItemListener(this);
      discountBRadioButton.addItemListener(this);
    discountCRadioButton.addItemListener(this);
 
      //add the panel to the frame
      add(mainPanel);
      setSize(300,400);
      setVisible(true);
}
 
public void itemStateChanged(ItemEvent evt)
{
if(discountARadioButton.isSelected())    
    {
        enabledComponents();
    }
    else if (discountBRadioButton.isSelected())
    {
        enabledComponents();
    }
    else if (discountCRadioButton.isSelected())
    {
        enabledComponents();
    }
}
 
public void actionPerformed(ActionEvent evt)
{
getInput();
clear();
}
 
public void getInput() 
{      
//declaring local variables 
int quantityInteger;
int discountTypeInteger;
double priceDouble;
double discountDouble;
String nameString;
char discountChar;
 
// get input
try
{
        quantityInteger = Integer.parseInt(quantityTextField.getText());
        try
        {
        priceDouble = Double.parseDouble(priceTextField.getText());
        }
 
        catch(NumberFormatException err)
        {
            JOptionPane.showMessageDialog(null, "Price is invalid");
            priceTextField.selectAll();
            priceTextField.requestFocus();
        }
        }
    catch(NumberFormatException err)
    {
        JOptionPane.showMessageDialog(null, "Quantity is invalid");
        quantityTextField.selectAll();
        quantityTextField.requestFocus();
    }
 
 
    if(discountARadioButton.isSelected())
    {
discountChar = 'a';
        discountTypeInteger = getTypeOfDiscount(discountChar);
        nameString = bookNameTextField.getText();
quantityInteger = Integer.parseInt(quantityTextField.getText());
        priceDouble = Double.parseDouble(priceTextField.getText());
 
        if((discountTypeInteger != -1))
        {    
            if (!(nameString.equals("")))
            {
Calculation myOrder = new Calculation(quantityInteger, discountTypeInteger, priceDouble);
discountDouble = myOrder.getDiscount();
displayOutput(quantityInteger, priceDouble, discountDouble, nameString, discountChar);
clear();
                }
                else
                {
JOptionPane.showMessageDialog(null, "Please Enter Book Name");
                bookNameTextField.selectAll();
                bookNameTextField.requestFocus();
                }
            }
        }
    else if(discountBRadioButton.isSelected())
    {
        discountChar = 'b';
discountTypeInteger = getTypeOfDiscount(discountChar);
        nameString = bookNameTextField.getText();
quantityInteger = Integer.parseInt(quantityTextField.getText());
priceDouble = Double.parseDouble(priceTextField.getText());
 
if((discountTypeInteger != -1))
            {    
                if (!(nameString.equals("")))
                {
Calculation myOrder = new Calculation(quantityInteger, 
                discountTypeInteger, priceDouble);
discountDouble = myOrder.getDiscount();
displayOutput(quantityInteger, priceDouble, discountDouble, nameString, discountChar);
                clear();
                }
                else
                {
JOptionPane.showMessageDialog(null, "Please Enter Book Name");
                bookNameTextField.selectAll();
                bookNameTextField.requestFocus();
                }
 
            }
        }
else if(discountCRadioButton.isSelected())
    {
        discountChar = 'c';
        discountTypeInteger = getTypeOfDiscount(discountChar);
        nameString = bookNameTextField.getText();
quantityInteger = Integer.parseInt(quantityTextField.getText());
        priceDouble = Double.parseDouble(priceTextField.getText());
 
            if((discountTypeInteger != -1))
            {    
                if (!(nameString.equals("")))
                {
                Calculation myOrder = new
Calculation(quantityInteger, 
                discountTypeInteger, priceDouble);
                discountDouble = myOrder.getDiscount();
displayOutput(quantityInteger, priceDouble, discountDouble, nameString, discountChar);
                clear();
                }
                else
                {
JOptionPane.showMessageDialog(null, "Please Enter Book Name");
                bookNameTextField.selectAll();
                bookNameTextField.requestFocus();
                }
}
}
try
{
quantityInteger = Integer.parseInt(quantityTextField.getText());
 
    try
    {
    priceDouble = Double.parseDouble(priceTextField.getText());
 
    }
    catch(NumberFormatException err)
    {
    JOptionPane.showMessageDialog(null, "Price is Invalid");
    priceTextField.selectAll();
    priceTextField.requestFocus();
    }
    }
    catch(NumberFormatException err)
    {
    JOptionPane.showMessageDialog(null, "Quantity is Invalid");
    quantityTextField.selectAll();
    quantityTextField.requestFocus();
    }
    }
 
//set text fields visible once a discount is selected    
public void enabledComponents()
{
    priceTextField.setEditable(true);
    calculateButton.setEnabled(true);
}
 
public int getTypeOfDiscount(char discountChar)
{        
    int discountTypeInteger = 0;
    {
    if(discountARadioButton.isSelected())
    {
    discountTypeInteger = 1;
    }
    else if(discountBRadioButton.isSelected())
    {
    discountTypeInteger = 2;
    }
    else if(discountCRadioButton.isSelected())
    {
    discountTypeInteger = 3;
    }
    else if(discountInvisibleRadioButton.isSelected())
    {
    discountTypeInteger = -1;
    }
    }
return discountTypeInteger;
    }
 
    public void displayOutput(int quantityInteger, double priceDouble, 
        double discountDouble, String nameString, char discountChar) 
    {
        //object to format to currency
      DecimalFormat formatDecimalFormat = new DecimalFormat("$0.00");
      DecimalFormat formatNumberFormat = new DecimalFormat("0");
Calculation myCalcs = new Calculation();
 
      String outputString;
 
      if(discountChar == 'a')
    {            
    outputString = "Name of the Book: " + nameString + '\n' + 
"Quantity Ordered: " + formatNumberFormat.format(myCalcs.getQuantity())
+ '\n' + "Price:     " + formatDecimalFormat.format(myCalcs.getPrice())
        + '\n' + "Discount Percentage: 20% " +
formatDecimalFormat.format(myCalcs.getDiscount())
        + '\n' + "Subtotal:     " + 
formatDecimalFormat.format(myCalcs.getSubTotal())
        + '\n' + "Shipping:     " +
formatDecimalFormat.format(myCalcs.getShipping())
        + '\n' + "Tax:     " +
formatDecimalFormat.format(myCalcs.getTax()) + '\n'+ 
        "Total:    " +    formatDecimalFormat.format(myCalcs.getTotal())+'\n' +'\n' +
    "Total Quantity To-Date: " + (myCalcs.getNumberOfOrders()) + '\n'
+ "Grand Total To-Date: " + formatDecimalFormat.format(myCalcs.getGrandTotal())+ '\n';
    outputTextArea.append(outputString);
    }
    else if(discountChar == 'b')
        {            
    outputString = "Name of the Book: " + nameString + '\n' + 
"Quantity Ordered: " + formatNumberFormat.format(myCalcs.getQuantity())
+ '\n' + "Price:     " + formatDecimalFormat.format(myCalcs.getPrice())
        + '\n' + "Discount Percentage: 20% " +
formatDecimalFormat.format(myCalcs.getDiscount())
        + '\n' + "Subtotal:     " + 
formatDecimalFormat.format(myCalcs.getSubTotal())
        + '\n' + "Shipping:     " +
formatDecimalFormat.format(myCalcs.getShipping())
        + '\n' + "Tax:     " +
formatDecimalFormat.format(myCalcs.getTax()) + '\n'+ 
        "Total:    " +    formatDecimalFormat.format(myCalcs.getTotal())+'\n' +'\n' +
    "Total Quantity To-Date: " + (myCalcs.getNumberOfOrders()) + '\n'
+ "Grand Total To-Date: " + formatDecimalFormat.format(myCalcs.getGrandTotal())+ '\n';
    outputTextArea.append(outputString);
    }
 
    else if(discountChar == 'c')
    {            
    outputString = "Name of the Book: " + nameString + '\n' + 
"Quantity Ordered: " + formatNumberFormat.format(myCalcs.getQuantity())
+ '\n' + "Price:     " + formatDecimalFormat.format(myCalcs.getPrice())
        + '\n' + "Discount Percentage: 20% " +
formatDecimalFormat.format(myCalcs.getDiscount())
        + '\n' + "Subtotal:     " + 
formatDecimalFormat.format(myCalcs.getSubTotal())
        + '\n' + "Shipping:     " +
formatDecimalFormat.format(myCalcs.getShipping())
        + '\n' + "Tax:     " +
formatDecimalFormat.format(myCalcs.getTax()) + '\n'+ 
        "Total:    " +    formatDecimalFormat.format(myCalcs.getTotal())+'\n' +'\n' +
    "Total Quantity To-Date: " + (myCalcs.getNumberOfOrders()) + '\n'
+ "Grand Total To-Date: " + formatDecimalFormat.format(myCalcs.getGrandTotal())+ '\n';
    outputTextArea.append(outputString);
    }
}
    }
 
    public void  clear()
    {
//clear existing text from text fields and request cursor to top
bookNameTextField.setText("");
quantityTextField.setText("");
discountInvisibleRadioButton.setSelected(true);
priceTextField.setText("");
bookNameTextField.requestFocus();
priceTextField.setEditable(false);
calculateButton.setEnabled(false);  
    }    
}

Here is the Calculation class just in case.

 
public class Calculation 
{
	private double priceDouble, subTotalDouble, taxDouble, 
	shippingDouble, totalDouble, discountDouble;
	private int quantityInteger, discountTypeInteger;
	private static double grandTotalDouble;
	private static int totalNumberOfOrdersInteger;
	private final double DISCOUNT_A = 0.20;
	private final double DISCOUNT_B = 0.10;
	private final double DISCOUNT_C = 0;
	private final double TAX_RATE = 0.0825;
	private final int SHIPPING_RATE_INTEGER = 1;
 
 
 
	public Calculation()
	{
 
	}
 
	public Calculation(int quantityNewInteger, int discountTypeNewInteger, double priceNewDouble)
	{
		setQuantity(quantityNewInteger);
		setPrice(priceNewDouble);
		setDiscount(discountTypeNewInteger);
		calculate();
	}
 
	private void setQuantity(int quantityNewInteger)
	{
		//assign public variable to private
		quantityInteger = quantityNewInteger;
 
		}
	private void setPrice(double priceNewDouble)
	{
		//assign public variable to private
		priceDouble = priceNewDouble;
 
		}
	private void setDiscount(int discountTypeNewInteger)
	{
		//assign public variable to private
		discountTypeInteger = discountTypeNewInteger;
	}
	private void calculate()
	{		
		//calculate the subTotal of the order
		subTotalDouble = quantityInteger * priceDouble;
		//calculate the shipping of the order
		shippingDouble = SHIPPING_RATE_INTEGER * quantityInteger;
		//calculate the Tax of the order
		taxDouble = subTotalDouble * TAX_RATE;
		//calculate the Total including shipping and tax of the order
		totalDouble = taxDouble + subTotalDouble + shippingDouble;
		// calculate the total of all ordersrs
		//and the number of orders processed
		grandTotalDouble += totalDouble;
 
		switch(discountTypeInteger)
		{
			case 1:
				calculateADiscount();
				totalNumberOfOrdersInteger++;
 
				break;
			case 2:
				calculateBDiscount();
				totalNumberOfOrdersInteger++;
				break;
			case 3:
				calculateCDiscount();
				totalNumberOfOrdersInteger++;
				break;
		}
 
	}
 
	private void calculateADiscount()
	{
		//calculate the subTotal of the order
		subTotalDouble = priceDouble * quantityInteger;
		//calculate the discount of the order
		discountDouble = subTotalDouble * DISCOUNT_A;
		//calculate the shipping of the order
		shippingDouble = SHIPPING_RATE_INTEGER * quantityInteger;
		//calculate the Tax of the order
		taxDouble = subTotalDouble * TAX_RATE;
		//calculate the Total including shipping and tax of the order
		totalDouble = taxDouble + subTotalDouble + shippingDouble;
 
	}
	//calculation of rental fees
	private void calculateBDiscount()
	{
		//calculate the subTotal of the order
		subTotalDouble = priceDouble * quantityInteger;
		//calculate the discount of the order
		discountDouble = subTotalDouble * DISCOUNT_B;
		//calculate the shipping of the order
		shippingDouble = SHIPPING_RATE_INTEGER * quantityInteger;
		//calculate the Tax of the order
		taxDouble = subTotalDouble * TAX_RATE;
		//calculate the Total including shipping and tax of the order
		totalDouble = taxDouble + subTotalDouble + shippingDouble;
	}
	//calculation of rental fees
	private void calculateCDiscount()
	{
		//calculate the subTotal of the order
		subTotalDouble = priceDouble * quantityInteger;
		//calculate the discount of the order
		discountDouble = DISCOUNT_C;
		//calculate the shipping of the order
		shippingDouble = SHIPPING_RATE_INTEGER * quantityInteger;
		//calculate the Tax of the order
		taxDouble = subTotalDouble * TAX_RATE;
		//calculate the Total including shipping and tax of the order
		totalDouble = taxDouble + subTotalDouble + shippingDouble;
	}
 
 
	public double getQuantity()
	{
		//returning quantity
		return quantityInteger;
 
	}
 
	public double getPrice()
	{
		//returning price
		return priceDouble;
	}
 
	public double getDiscount()
	{
		//returning discount
		return discountDouble;
 
	}
	public double getSubTotal()
	{
		//returning subTotal
		return subTotalDouble;
 
	}
 
	public double getShipping()
	{
		//returning shipping
		return shippingDouble;
 
	}
 
	public double getTax()
	{
		//returning Tax
		return taxDouble;
 
	}
 
	public double getTotal()
	{
		//returning grand total of orders
		return totalDouble;
	}
 
	public double getGrandTotal()
	{
		//returning grand total of orders
		return grandTotalDouble;
	}
 
	public int getNumberOfOrders()
	{
		//return total number of orders processed
		return totalNumberOfOrdersInteger;
	}	
}

I keep getting "Quantity is Invalid" no matter what I enter...

I'm looking over the code for you now.

Ok I fixed that error..... I don't know why but I placed my try and catch twice. Removed the bottom one and now I don't have that error.

import javax.swing.*;
import java.awt.event.*;
import java.text.*;
import java.awt.*;
 
public class Presentation extends JFrame implements ActionListener, ItemListener 
{
    // All the GUI objects
    JPanel mainPanel = new JPanel();
	JPanel discountPanel = new JPanel();
    JLabel storeLabel = new JLabel("       OrderBook INC.         ");
    JTextField bookNameTextField = new JTextField(20);
    JTextField quantityTextField = new JTextField(20);
    JRadioButton discountARadioButton = new JRadioButton(" A ");
	JRadioButton discountBRadioButton = new JRadioButton(" B ");
	JRadioButton discountCRadioButton = new JRadioButton(" C ");
	JRadioButton discountInvisibleRadioButton = new JRadioButton("");
	ButtonGroup discountButtonGroup = new ButtonGroup();
    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
        Presentation myBooks = new Presentation();
        myBooks.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
    }
 
    public Presentation() 
    {
		designFrame();
		add(mainPanel);
		setTitle("OrderBook INC.");
		setSize(304,600);
		setVisible(true);        
    }
 
    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);
        //adding discount radio buttons to car radio button group 
        mainPanel.add(new JLabel("   Discount Type   "));
		discountButtonGroup.add(discountARadioButton);
		discountButtonGroup.add(discountBRadioButton);
		discountButtonGroup.add(discountCRadioButton);
		discountButtonGroup.add(discountInvisibleRadioButton);
		//adding radio buttons to panel
		mainPanel.add(discountARadioButton);
		mainPanel.add(discountBRadioButton);
		mainPanel.add(discountCRadioButton);
        priceTextField.setEditable(false);
		calculateButton.setEnabled(false);
        mainPanel.add(new JLabel("    Price       "));
        mainPanel.add(priceTextField);
        mainPanel.add(calculateButton);
        mainPanel.add(outputScrollPane);
 
        //add the listeners
        priceTextField.addActionListener(this);
        calculateButton.addActionListener(this);
        discountARadioButton.addItemListener(this);
        discountBRadioButton.addItemListener(this);
		discountCRadioButton.addItemListener(this);
 
        //add the panel to the frame
        add(mainPanel);
        setSize(300,400);
        setVisible(true);
    }
 
  //create a listener for the Radio Buttons
	public void itemStateChanged(ItemEvent evt)
	{
		if(discountARadioButton.isSelected())	
		{
			enabledComponents();
		}
		else if (discountBRadioButton.isSelected())
		{
			enabledComponents();
		}
		else if (discountCRadioButton.isSelected())
		{
			enabledComponents();
		}
	}
    public void actionPerformed(ActionEvent evt)
 
    {
        getInput();
        clear();        
    }
 
    //declaring local variables    	
 
 
 
    public void getInput() 
    {  	
        //declaring local variables 
    	char discountChar;
    	int quantityInteger;
    	int discountTypeInteger;
    	double priceDouble;
    	double discountDouble;
    	String nameString;
 
        // get input
    	try
		{
		quantityInteger = Integer.parseInt(quantityTextField.getText());
 
		try
		{
			priceDouble = Double.parseDouble(priceTextField.getText());
 
		}
		catch(NumberFormatException err)
		{
			JOptionPane.showMessageDialog(null, "Price is invalid");
			priceTextField.selectAll();
			priceTextField.requestFocus();
		}
		}
		catch(NumberFormatException err)
		{
			JOptionPane.showMessageDialog(null, "Quantity is invalid");
			quantityTextField.selectAll();
			quantityTextField.requestFocus();
		}
 
 
		if(discountARadioButton.isSelected())
		{
			discountChar = 'a';
			discountTypeInteger = getTypeOfDiscount(discountChar);
			nameString = bookNameTextField.getText();
			quantityInteger = Integer.parseInt(quantityTextField.getText());
			priceDouble = Double.parseDouble(priceTextField.getText());
 
			if((discountTypeInteger != -1))
			{	
				if (!(nameString.equals("")))
				{
					Calculation myOrder = new Calculation(quantityInteger, 
							discountTypeInteger, priceDouble);
					discountDouble = myOrder.getDiscount();
					displayOutput(quantityInteger, priceDouble, discountDouble, 
							nameString, discountChar);
					clear();
					}
					else
					{
					JOptionPane.showMessageDialog(null, "Please Enter Book Name");
					bookNameTextField.selectAll();
					bookNameTextField.requestFocus();
					}
				}
			}
		else if(discountBRadioButton.isSelected())
		{
			discountChar = 'b';
			discountTypeInteger = getTypeOfDiscount(discountChar);
			nameString = bookNameTextField.getText();
			quantityInteger = Integer.parseInt(quantityTextField.getText());
			priceDouble = Double.parseDouble(priceTextField.getText());
 
			if((discountTypeInteger != -1))
			{	
				if (!(nameString.equals("")))
				{
					Calculation myOrder = new Calculation(quantityInteger, 
							discountTypeInteger, priceDouble);
					discountDouble = myOrder.getDiscount();
					displayOutput(quantityInteger, priceDouble, discountDouble, 
							nameString, discountChar);
					clear();
					}
					else
					{
					JOptionPane.showMessageDialog(null, "Please Enter Book Name");
					bookNameTextField.selectAll();
					bookNameTextField.requestFocus();
					}
				}
			}
			else if(discountCRadioButton.isSelected())
			{
				discountChar = 'c';
				discountTypeInteger = getTypeOfDiscount(discountChar);
				nameString = bookNameTextField.getText();
				quantityInteger = Integer.parseInt(quantityTextField.getText());
				priceDouble = Double.parseDouble(priceTextField.getText());
 
				if((discountTypeInteger != -1))
				{	
					if (!(nameString.equals("")))
					{
						Calculation myOrder = new Calculation(quantityInteger, 
								discountTypeInteger, priceDouble);
						discountDouble = myOrder.getDiscount();
						displayOutput(quantityInteger, priceDouble, discountDouble, 
								nameString, discountChar);
						clear();
						}
						else
						{
						JOptionPane.showMessageDialog(null, "Please Enter Book Name");
						bookNameTextField.selectAll();
						bookNameTextField.requestFocus();
						}
			}
		}
	}			
    //set text fields visible once a discount is selected	
	public void enabledComponents()
	{
		priceTextField.setEditable(true);
		calculateButton.setEnabled(true);
 
 
	}
 
    public int getTypeOfDiscount(char discountChar)
	{		
		int discountTypeInteger = 0;
		{
			if(discountARadioButton.isSelected())
			{
 
				discountTypeInteger = 1;
			}
			else if(discountBRadioButton.isSelected())
			{
				discountTypeInteger = 2;
			}
			else if(discountCRadioButton.isSelected())
			{
				discountTypeInteger = 3;
			}
			else if(discountInvisibleRadioButton.isSelected())
			{
				discountTypeInteger = -1;
			}
		}
		return discountTypeInteger;
	}
 
    public void displayOutput(int quantityInteger, double priceDouble, 
    		double discountDouble, String nameString, char discountChar) 
    {
    	 //object to format to currency
        DecimalFormat formatDecimalFormat = new DecimalFormat("$0.00");
        DecimalFormat formatNumberFormat = new DecimalFormat("0");
 
 
     Calculation myCalcs = new Calculation();
 
        String outputString;
 
        if(discountChar == 'a')
		{			
		outputString =  '\n' + "Name of the Book: " + nameString + '\n' + 
    		"Quantity Ordered: " + formatNumberFormat.format(myCalcs.getQuantity())
    		+ '\n' + "Price: 	" + formatDecimalFormat.format(myCalcs.getPrice())
    		+ '\n' + "Discount Percentage: 20% " + formatDecimalFormat.format(myCalcs.getDiscount())
    		+ '\n' + "Subtotal: 	" + formatDecimalFormat.format(myCalcs.getSubTotal())
    		+ '\n' + "Shipping: 	" + formatDecimalFormat.format(myCalcs.getShipping())
    		+ '\n' + "Tax: 	" + formatDecimalFormat.format(myCalcs.getTax()) + '\n'+ 
    		"Total:	" +	formatDecimalFormat.format(myCalcs.getTotal()) + '\n' +'\n' + 
    		"Total Quantity To-Date: " + (myCalcs.getNumberOfOrders()) + '\n' + 
    		"Grand Total To-Date: " + formatDecimalFormat.format(myCalcs.getGrandTotal())
    		+ '\n';
		outputTextArea.append(outputString);
		}
		else if(discountChar == 'b')
		{			
			outputString =  '\n' + "Name of the Book: " + nameString + '\n' + 
    		"Quantity Ordered: " + formatNumberFormat.format(myCalcs.getQuantity())
    		+ '\n' + "Price: 	" + formatDecimalFormat.format(myCalcs.getPrice())
    		+ '\n' + "Discount Percentage: 10% " + formatDecimalFormat.format(myCalcs.getDiscount())
    		+ '\n' + "Subtotal: 	" + formatDecimalFormat.format(myCalcs.getSubTotal())
    		+ '\n' + "Shipping: 	" + formatDecimalFormat.format(myCalcs.getShipping())
    		+ '\n' + "Tax: 	" + formatDecimalFormat.format(myCalcs.getTax()) + '\n'+ 
    		"Total:	" +	formatDecimalFormat.format(myCalcs.getTotal()) + '\n' +'\n' + 
    		"Total Quantity To-Date: " + (myCalcs.getNumberOfOrders()) + '\n' + 
    		"Grand Total To-Date: " + formatDecimalFormat.format(myCalcs.getGrandTotal())
    		+ '\n';
		outputTextArea.append(outputString);
		}
		else if(discountChar == 'c')
		{			
			outputString =  '\n' + "Name of the Book: " + nameString + '\n' +
    		"Quantity Ordered: " + formatNumberFormat.format(myCalcs.getQuantity())
    		+ '\n' + "Price: 	" + formatDecimalFormat.format(myCalcs.getPrice())
    		+ '\n' + "No Discount: " + formatDecimalFormat.format(myCalcs.getDiscount())
    		+ '\n' + "Subtotal: 	" + formatDecimalFormat.format(myCalcs.getSubTotal())
    		+ '\n' + "Shipping: 	" + formatDecimalFormat.format(myCalcs.getShipping())
    		+ '\n' + "Tax: 	" + formatDecimalFormat.format(myCalcs.getTax()) + '\n'+ 
    		"Total:	" +	formatDecimalFormat.format(myCalcs.getTotal()) + '\n' +'\n' + 
    		"Total Quantity To-Date: " + (myCalcs.getNumberOfOrders()) + '\n' + 
    		"Grand Total To-Date: " + formatDecimalFormat.format(myCalcs.getGrandTotal())
    		+ '\n';
		outputTextArea.append(outputString);
	}
    }
 
    public void  clear()
    {
    	//clear existing text from text fields and request cursor to top
    	bookNameTextField.setText("");
        quantityTextField.setText("");
		discountInvisibleRadioButton.setSelected(true);
        priceTextField.setText("");
        bookNameTextField.requestFocus();
        priceTextField.setEditable(false);
		calculateButton.setEnabled(false);
 
    }    
}

Originally Posted by Flash

I keep getting "Quantity is Invalid" no matter what I enter...

I'm looking over the code for you now.

Any luck Flash?

First of all, there is no need to create two calculation objects as one will suffice, further more when using the try/catch block don't ignore the stacktraces as you did in your try catch blok. I've made some changes and comments in your code.

import javax.swing.*;
import java.awt.event.*;
import java.text.*;
import java.awt.*;
 
public class Presentation extends JFrame implements ActionListener, ItemListener 
{
	// All the GUI objects
	JPanel mainPanel = new JPanel();
	JPanel discountPanel = new JPanel();
	JLabel storeLabel = new JLabel("       OrderBook INC.         ");
	JTextField bookNameTextField = new JTextField(20);
	JTextField quantityTextField = new JTextField(20);
	JRadioButton discountARadioButton = new JRadioButton(" A ");
	JRadioButton discountBRadioButton = new JRadioButton(" B ");
	JRadioButton discountCRadioButton = new JRadioButton(" C ");
	JRadioButton discountInvisibleRadioButton = new JRadioButton("");
	ButtonGroup discountButtonGroup = new ButtonGroup();
	JTextField priceTextField = new JTextField(20);
	JButton calculateButton = new JButton(" Calculate   ");
	JTextArea outputTextArea = new JTextArea("Books Ordered", 10,25);
	JScrollPane outputScrollPane = new JScrollPane(outputTextArea);
	//create only one instance, not two!
	Calculation myOrder ;
	//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
		Presentation myBooks = new Presentation();
		myBooks.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
 
	public Presentation() 
	{
		designFrame();
		add(mainPanel);
		setTitle("OrderBook INC.");
		setSize(304,600);
		setVisible(true);        
	}
 
	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);
		//adding discount radio buttons to car radio button group 
		mainPanel.add(new JLabel("   Discount Type   "));
		discountButtonGroup.add(discountARadioButton);
		discountButtonGroup.add(discountBRadioButton);
		discountButtonGroup.add(discountCRadioButton);
		discountButtonGroup.add(discountInvisibleRadioButton);
		//adding radio buttons to panel
		mainPanel.add(discountARadioButton);
		mainPanel.add(discountBRadioButton);
		mainPanel.add(discountCRadioButton);
		priceTextField.setEditable(false);
		calculateButton.setEnabled(false);
		mainPanel.add(new JLabel("    Price       "));
		mainPanel.add(priceTextField);
		mainPanel.add(calculateButton);
		mainPanel.add(outputScrollPane);
 
		//add the listeners
		priceTextField.addActionListener(this);
		calculateButton.addActionListener(this);
		discountARadioButton.addItemListener(this);
		discountBRadioButton.addItemListener(this);
		discountCRadioButton.addItemListener(this);
 
		//add the panel to the frame
		add(mainPanel);
		setSize(300,400);
		setVisible(true);
	}
 
	public void itemStateChanged(ItemEvent evt)
	{
		if(discountARadioButton.isSelected())	
		{
			enabledComponents();
		}
		else if (discountBRadioButton.isSelected())
		{
			enabledComponents();
		}
		else if (discountCRadioButton.isSelected())
		{
			enabledComponents();
		}
	}
 
	public void actionPerformed(ActionEvent evt)
	{
		getInput();
		clear();
	}
 
	public void getInput() 
	{  	
//		declaring local variables 
		int quantityInteger;
		int discountTypeInteger;
		double priceDouble;
		double discountDouble;
		String nameString;
		char discountChar;
 
//		get input
 
		try{
			//	quantityInteger = Integer.parseInt(quantityTextField.getText());		
			//	priceDouble = Double.parseDouble(priceTextField.getText());
 
		}
		catch(NumberFormatException e){
			//its ALWAYS a good idea to print the stacktrace.
		}
 
 
 
 
		if(discountARadioButton.isSelected())
		{
			discountChar = 'a';
			discountTypeInteger = getTypeOfDiscount(discountChar);
			nameString = bookNameTextField.getText();
 
			//You should try catch this.
 
			try{
				quantityInteger = Integer.parseInt(quantityTextField.getText());
				priceDouble = Double.parseDouble(priceTextField.getText());
 
			if((discountTypeInteger != -1))
			{	
				if (!(nameString.equals("")))
				{
					myOrder = new Calculation(quantityInteger, discountTypeInteger, priceDouble);
					discountDouble = myOrder.getDiscount();
					displayOutput(quantityInteger, priceDouble, discountDouble, nameString, discountChar);
					clear();
				}
				else
				{
					JOptionPane.showMessageDialog(null, "Please Enter Book Name");
					bookNameTextField.selectAll();
					bookNameTextField.requestFocus();
				}
			}
			}
			catch(NumberFormatException e){
				outputTextArea.setText("Please recorrect your input.");
				//its ALWAYS a good idea to print the stacktrace.
			}
		}
		else if(discountBRadioButton.isSelected())
		{
			discountChar = 'b';
			discountTypeInteger = getTypeOfDiscount(discountChar);
			nameString = bookNameTextField.getText();
			quantityInteger = Integer.parseInt(quantityTextField.getText());
			priceDouble = Double.parseDouble(priceTextField.getText());
 
			if((discountTypeInteger != -1))
			{	
				if (!(nameString.equals("")))
				{
					myOrder = new Calculation(quantityInteger, 
							discountTypeInteger, priceDouble);
					discountDouble = myOrder.getDiscount();
					displayOutput(quantityInteger, priceDouble, discountDouble, nameString, discountChar);
					clear();
				}
				else
				{
					JOptionPane.showMessageDialog(null, "Please Enter Book Name");
					bookNameTextField.selectAll();
					bookNameTextField.requestFocus();
				}
 
			}
		}
		else if(discountCRadioButton.isSelected())
		{
			discountChar = 'c';
			discountTypeInteger = getTypeOfDiscount(discountChar);
			nameString = bookNameTextField.getText();
			quantityInteger = Integer.parseInt(quantityTextField.getText());
			priceDouble = Double.parseDouble(priceTextField.getText());
 
			if((discountTypeInteger != -1))
			{	
				if (!(nameString.equals("")))
				{
					myOrder = new Calculation(quantityInteger, 
							discountTypeInteger, priceDouble);
					discountDouble = myOrder.getDiscount();
					displayOutput(quantityInteger, priceDouble, discountDouble, nameString, discountChar);
					clear();
				}
				else
				{
					JOptionPane.showMessageDialog(null, "Please Enter Book Name");
					bookNameTextField.selectAll();
					bookNameTextField.requestFocus();
				}
			}
		}	
	}
 
//	set text fields visible once a discount is selected	
	public void enabledComponents()
	{
		priceTextField.setEditable(true);
		calculateButton.setEnabled(true);
	}
 
	public int getTypeOfDiscount(char discountChar)
	{		
		int discountTypeInteger = 0;
		{
			if(discountARadioButton.isSelected())
			{
				discountTypeInteger = 1;
			}
			else if(discountBRadioButton.isSelected())
			{
				discountTypeInteger = 2;
			}
			else if(discountCRadioButton.isSelected())
			{
				discountTypeInteger = 3;
			}
			else if(discountInvisibleRadioButton.isSelected())
			{
				discountTypeInteger = -1;
			}
		}
		return discountTypeInteger;
	}
 
	public void displayOutput(int quantityInteger, double priceDouble, 
			double discountDouble, String nameString, char discountChar) 
	{
		//object to format to currency
		DecimalFormat formatDecimalFormat = new DecimalFormat("$0.00");
		DecimalFormat formatNumberFormat = new DecimalFormat("0");
		//Calculation myCalcs = new Calculation();
 
		String outputString;
 
		if(discountChar == 'a')
		{			
			outputString = "Name of the Book: " + nameString + '\n' + 
			"Quantity Ordered: " + formatNumberFormat.format(myOrder.getQuantity())
			+ '\n' + "Price: 	" + formatDecimalFormat.format(myOrder.getPrice())
			+ '\n' + "Discount Percentage: 20% " +
			formatDecimalFormat.format(myOrder.getDiscount())
			+ '\n' + "Subtotal: 	" + 
			formatDecimalFormat.format(myOrder.getSubTotal())
			+ '\n' + "Shipping: 	" +
			formatDecimalFormat.format(myOrder.getShipping())
			+ '\n' + "Tax: 	" +
			formatDecimalFormat.format(myOrder.getTax()) + '\n'+ 
			"Total:	" +	formatDecimalFormat.format(myOrder.getTotal())+'\n' +'\n' +
			"Total Quantity To-Date: " + (myOrder.getNumberOfOrders()) + '\n'
			+ "Grand Total To-Date: " + formatDecimalFormat.format(myOrder.getGrandTotal())+ '\n';
			outputTextArea.append(outputString);
		}
		else if(discountChar == 'b')
		{			
			outputString = "Name of the Book: " + nameString + '\n' + 
			"Quantity Ordered: " + formatNumberFormat.format(myOrder.getQuantity())
			+ '\n' + "Price: 	" + formatDecimalFormat.format(myOrder.getPrice())
			+ '\n' + "Discount Percentage: 20% " +
			formatDecimalFormat.format(myOrder.getDiscount())
			+ '\n' + "Subtotal: 	" + 
			formatDecimalFormat.format(myOrder.getSubTotal())
			+ '\n' + "Shipping: 	" +
			formatDecimalFormat.format(myOrder.getShipping())
			+ '\n' + "Tax: 	" +
			formatDecimalFormat.format(myOrder.getTax()) + '\n'+ 
			"Total:	" +	formatDecimalFormat.format(myOrder.getTotal())+'\n' +'\n' +
			"Total Quantity To-Date: " + (myOrder.getNumberOfOrders()) + '\n'
			+ "Grand Total To-Date: " + formatDecimalFormat.format(myOrder.getGrandTotal())+ '\n';
			outputTextArea.append(outputString);
		}
 
		else if(discountChar == 'c')
		{			
			outputString = "Name of the Book: " + nameString + '\n' + 
			"Quantity Ordered: " + formatNumberFormat.format(myOrder.getQuantity())
			+ '\n' + "Price: 	" + formatDecimalFormat.format(myOrder.getPrice())
			+ '\n' + "Discount Percentage: 20% " +
			formatDecimalFormat.format(myOrder.getDiscount())
			+ '\n' + "Subtotal: 	" + 
			formatDecimalFormat.format(myOrder.getSubTotal())
			+ '\n' + "Shipping: 	" +
			formatDecimalFormat.format(myOrder.getShipping())
			+ '\n' + "Tax: 	" +
			formatDecimalFormat.format(myOrder.getTax()) + '\n'+ 
			"Total:	" +	formatDecimalFormat.format(myOrder.getTotal())+'\n' +'\n' +
			"Total Quantity To-Date: " + (myOrder.getNumberOfOrders()) + '\n'
			+ "Grand Total To-Date: " + formatDecimalFormat.format(myOrder.getGrandTotal())+ '\n';
			outputTextArea.append(outputString);
		}
	}
	// }
 
	public void  clear()
	{
//		clear existing text from text fields and request cursor to top
		bookNameTextField.setText("");
		quantityTextField.setText("");
		discountInvisibleRadioButton.setSelected(true);
		priceTextField.setText("");
		bookNameTextField.requestFocus();
		priceTextField.setEditable(false);
		calculateButton.setEnabled(false);  
	}    
}

if you have any questions about this let me know.

I was almost there crazydeo but ES beat me too it!

Good work Engineeringserver!! - That is working perfectly for me

Originally Posted by Flash

I was almost there crazydeo but ES beat me too it!

Good work Engineeringserver!! - That is working perfectly for me

Your welcome

Thank you FLASH and Engineeringserver!!!! You both seriously saved me a lot of headache!!