Comp Sci Java GUI program determining retail price, does not finish running

[opaquin]

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);
}
}

}

 

[gabbagabbahey]

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);
}
}

}

How does your JButton know to call the ActionPerformed method of CalcButtonListener when you haven't added any listeners to calcButton?

Aside: please use code tags to wrap your in future posts, it preserves indentations and makes it much easier to read

 

[opaquin]

thank you! Not going to make that mistake again.

future code posts will have code tags, sorry 'bout that.