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05-14-2008, 06:14 PM
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Member
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Join Date: May 2008
Posts: 21
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[SOLVED] Please Help!!
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!!!
/* Project : 8
* Class : CISP21
* Date : 05/14/08
* Programmer : Adeel Mujtaba
* Description : An application that computes the total charges for
* Order INC. and displays the output in JFrame
*
*/
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);
}
}
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05-14-2008, 06:58 PM
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Senior Member
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Join Date: Mar 2008
Location: Delhi, India
Posts: 187
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Post the code for Calculation class or let me know if this is some api ?
__________________
i am the future
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05-14-2008, 07:02 PM
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Member
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Join Date: May 2008
Posts: 21
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Calculation Class
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()
{
switch(discountTypeInteger)
{
case 1:
calculateADiscount();
totalNumberOfOrdersInteger++;
break;
case 2:
calculateBDiscount();
totalNumberOfOrdersInteger++;
break;
case 3:
calculateCDiscount();
totalNumberOfOrdersInteger++;
break;
}
}
//calculation of fees
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;
//total number of orders processed
grandTotalDouble += totalDouble;
}
//calculation of 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;
//total number of orders processed
grandTotalDouble += totalDouble;
}
//calculation of 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;
//total number of orders processed
grandTotalDouble += totalDouble;
}
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;
}
}
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05-14-2008, 07:04 PM
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Member
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Join Date: May 2008
Posts: 21
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Fixed acouple of things in the Presentation Class as well.
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();
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);
}
}
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05-14-2008, 08:23 PM
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Senior Member
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Join Date: Mar 2008
Location: Delhi, India
Posts: 187
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package com.faaltu.PriceCalculation;
import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.text.DecimalFormat;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class Presentation extends JFrame implements ActionListener, ItemListener
{
// All the GUI objects
JPanel mainPanel = 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(myOrder, 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(myOrder, 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(myOrder, 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( Calculation myCalcs, 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");
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);
}
}
package com.faaltu.PriceCalculation;
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();
}
public void setQuantity(int quantityNewInteger)
{
//assign public variable to private
quantityInteger = quantityNewInteger;
}
public void setPrice(double priceNewDouble)
{
//assign public variable to private
priceDouble = priceNewDouble;
}
public void setDiscount(int discountTypeNewInteger)
{
//assign public variable to private
discountTypeInteger = discountTypeNewInteger;
}
public void calculate()
{
switch(discountTypeInteger)
{
case 1:
calculateADiscount();
totalNumberOfOrdersInteger++;
break;
case 2:
calculateBDiscount();
totalNumberOfOrdersInteger++;
break;
case 3:
calculateCDiscount();
totalNumberOfOrdersInteger++;
break;
}
}
//calculation of fees
public 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;
//total number of orders processed
grandTotalDouble += totalDouble;
}
//calculation of fees
public 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;
//total number of orders processed
grandTotalDouble += totalDouble;
}
//calculation of fees
public 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;
//total number of orders processed
grandTotalDouble += totalDouble;
}
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;
}
}
Now it is working fine, 
but my friend whichever practice you are following is not fine
__________________
i am the future
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