- #1
opaquin
- 10
- 0
Homework Statement
Just trying to finish up this assignment, no errors. I run the program, enter a value and a percentage, then click calculate. Program just runs, never displays results. Check my code below, let me know if something is wrong.
Driver:
package ch7pc1;
import javax.swing.*;
/**
*/
public class CH7PC1
{
/**
* @param args the command line arguments
*/
public static void main(String[] args)
{
//create instance of class
RetailPriceCalculator rpc = new RetailPriceCalculator();
}
}
Class:
/*
* Retail Price Calculator Class
*/
package ch7pc1;
import java.awt.GridLayout;
import javax.swing.*;
import java.awt.event.*;
/**
*
*/
class RetailPriceCalculator extends JFrame
{
private final int WINDOW_WIDTH = 350;
private final int WINDOW_HEIGHT = 250;
//create two textFields fields
JTextField dealerCostTextField = new JTextField (10);
JTextField retailTextField = new JTextField (10);
public RetailPriceCalculator()
{
//set window title
setTitle("Retail Price Calculator");
//set size of window
setSize(WINDOW_WIDTH, WINDOW_HEIGHT);
//specify what happens when the close button is clicked
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//add GridLayout manager to content pane
setLayout(new GridLayout(3,2));
//create two labels
JLabel dealerCostLabel = new JLabel("Dealer cost $");
JLabel markupLabel = new JLabel("Markup Percentage");
//create one button
JButton calcButton = new JButton("Calculate");
//create panels
JPanel panel1 = new JPanel();
JPanel panel2 = new JPanel();
JPanel panel3 = new JPanel();
JPanel panel4 = new JPanel();
JPanel panel5 = new JPanel();
JPanel panel6 = new JPanel();
//add labels to panel
panel1.add(dealerCostLabel);
panel2.add(markupLabel);
//add textFields to panel
panel3.add(dealerCostTextField);
panel4.add(retailTextField);
//add buttons to panels
panel5.add(calcButton);
//add panel to frame's content pane
add(panel1);
add(panel2);
add(panel3);
add(panel4);
add(panel5);
//display window
setVisible(true);
}
private class CalcButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
String input1, input2; //hold user's input
double amount, convert; //cost of item
//get text enter by user in text field
input1 = dealerCostTextField.getText();
//get text enter by user in text field
input2 = retailTextField.getText();
//convert input2 to percent
convert = (Double.parseDouble(input2) *.01)+1;
//convert input to retail price
amount = Double.parseDouble(input1)*convert;
//display the result
JOptionPane.showMessageDialog(null, "The retail price is $" + amount);
}
}
}
