Calculating widget costs

[Marcel Goulart]

I am doing a homework assignment and I have to create a GUI that calculates the cost of an imaginary widget at a user specified price the only things that dont change is the percentage of tax(7.5%) and shipping costs(which is $9.95).
I am having an issue with the text fields doing the arithmetic and then displaying it.

Here is my code so far.

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.NumberFormat;

/**
 
 *
 */
public class priceCalculator extends JFrame {

	private JLabel message;
	private JLabel widgetCost;
	private JLabel widgetTax;
	private JLabel widgetShip;
	private JTextField widgetAmount;
	private JTextField widgetCostText;
	private JTextField widgetTaxText;
	private JTextField widgetShipText;
	private JTextField totalText;
	private JButton calcButton;
	JPanel panel = new JPanel();
	/** Useful for printing out money. **/
	public static NumberFormat currency = NumberFormat.getCurrencyInstance();

	
	/**
	 * Sets up the GUI window.
	 */
	public priceCalculator() {
		setTitle("Price Calculator");
		setSize(300, 200);
		setLayout(new GridLayout(5,2));
		message = new JLabel(
		          "How many widgets?");
		add(message);
		widgetAmount = new JTextField(10);
		add(widgetAmount);
		widgetCost = new JLabel(
		          "How much per widget?");
		add(widgetCost);
		widgetCostText= new JTextField(10);
		add(widgetCostText);
		
		widgetTax = new JLabel(
		          "Calculated tax (7.5%)");
		add(widgetTax);
		widgetTaxText = new JTextField(10);
		add(widgetTaxText);
		widgetTaxText.setEditable(false);
		widgetShip = new JLabel(
		          "Calculated shipping");
		add(widgetShip);
		
		widgetShipText = new JTextField(10);
		add(widgetShipText);
		widgetShipText.setEditable(false);
		widgetShipText.setText("9.95");
		calcButton = new JButton("Total");
        add(calcButton);
        totalText = new JTextField(10);
		add(totalText);
        totalText.setEditable(false);
      
      //  calcButton.addActionListener(new totalButtonListener((Amountcost * WidgetCount) + 9.95));
      
		
		
		
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setVisible(true);  // keep this as the last statement of the constructor
	}
	private class totalButtonListener implements ActionListener {
		String input;
		String Amountinput;
		Double Amountcost;
		Double WidgetCount;
		@Override
		public void actionPerformed(ActionEvent e) {
			
			// TODO Auto-generated method stub
			
			input = widgetAmount.getText();
			Amountinput = widgetCost.getText();
			Amountcost = Double.parseDouble(input);
			WidgetCount = Double.parseDouble(Amountinput);
			 
			
			
		}
		
			
		
		

	}
	// you'll probably define a listener class here
	
	
	/**
	 * This starts the program.
	 * @param args Totally ignored.   
	 */
	public static void main(String[] args) {
		priceCalculator window = new priceCalculator();

	}
	
}

[Ranganathan Kaliyur Mannar]

Hi Marcel,
Welcome to the Ranch!

You have mentioned you have an issue. What is it? Are you getting errors/exceptions when running the code? You need to provide us more details about the problem.
I see that you are getting the values from the textfield and converting it to the data type. I think you should proceed with writing the calculation code.

[Marcel Goulart]

Thank you for the welcome Ranganathan, I figured it out last night. I had a couple things in the wrong spot. I'll upload the correct code.

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import 

java.text.NumberFormat;

/**
  @Author Marcel Goulart
 *
 */
public class priceCalculator extends JFrame {

	private JLabel 

message;
	private JLabel widgetCost;
	private JLabel widgetTax;
	private JLabel 

widgetShip;
	private JTextField widgetAmount;
	private JTextField widgetCostText;
	

private JTextField widgetTaxText;
	private JTextField widgetShipText;
	private 

JTextField totalText;
	private JButton calcButton;
	JPanel panel = new JPanel();
	/** 

Useful for printing out money. **/
	public static NumberFormat currency = NumberFormat.getCurrencyInstance();

	
	/**
	 * Sets up the GUI window.
	 */
	

public priceCalculator() {
		setTitle("Price Calculator");
		setSize(300, 200);
		setLayout(new GridLayout(5,2));
		message = new JLabel("How many widgets?");
		add(message);
		widgetAmount = new JTextField(10);
		

add(widgetAmount);
		widgetCost = new JLabel("How much per widget?");
		add(widgetCost);
		widgetCostText= new JTextField(10);
		

add(widgetCostText);
		
		widgetTax = new JLabel("Calculated tax (7.5%)");
	

	add(widgetTax);
		widgetTaxText = new JTextField(10);
		add

(widgetTaxText);
		widgetTaxText.setEditable(false);
		widgetShip = new 

JLabel("Calculated shipping");
		add(widgetShip);
		
		

widgetShipText = new JTextField(10);
		add(widgetShipText);
		

widgetShipText.setEditable(false);
		
		

calcButton = new JButton("Total");
		add(calcButton);
		totalText = new 

JTextField(10);
		add(totalText);
		totalText.setEditable(false);
                

calcButton.addActionListener(new totalButtonListener());
		setDefaultCloseOperation

(JFrame.EXIT_ON_CLOSE);
		setVisible(true);  // keep this as the last statement of the constructor
	}
	private class totalButtonListener implements ActionListener {
		

String input;
		String Amountinput;
		Double Amountcost;
		Double 

WidgetCount;
		Double Subtotal;
		Double Total;
		Double Tax;
		

@Override
		public void actionPerformed(ActionEvent e) {
			
		

try	// TODO Auto-generated method stub
                {	
			input = widgetAmount.getText();
			Amountinput = widgetCostText.getText();
			

Amountcost = Double.parseDouble(input);
			WidgetCount = Double.parseDouble(Amountinput);
			Subtotal = WidgetCount * Amountcost;
			Tax = Subtotal * .075;
			Total = Subtotal + Tax + 9.95;
			widgetTaxText.setText(Tax.toString());
			widgetShipText.setText("9.95");

totalText.setText(Total.toString());
                }
                catch (Exception x)
          

      {
                    String s = "Please enter in a number.";
                }	
			
		

}
		
			
		
		

	}
	// you'll probably define a listener class here
	
	
	/**
	 * This starts the program.
	 

* @param args Totally ignored.   
	 */
	public static void main(String[] args) {
		

priceCalculator window = new priceCalculator();

	}
	
}

[Ranganathan Kaliyur Mannar]

Ok. So, is it all working ok now? do you need anymore help?

[Campbell Ritchie]

Marcel Goulart wrote:Thank you for the welcome Ranganathan, I figured it out last night. I had a couple things in the wrong spot. I'll upload the correct code.
. . .

Well done sorting it out , but that code needs a lot of editing if you want lots of marks. Get rid of all the tabs and excess blank lines, and make sure all code inside {} lines up vertically. We have some suggestions about formatting, which you might do well to look at.