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Java project output problem. Can't output objects from a method.

  • Comp Sci
  • Thread starter clook
  • Start date
35
0
I'm trying to create a bookstore calculation program with two classes, a presentation and computation class. Here is my code for the presentation class:
Code:
import javax.swing.*;
import java.awt.event.*;
import java.text.*;
import java.awt.*;

public class ch4Book extends JFrame implements ActionListener
{

	// All the GUI objects
	JPanel mainPanel = new JPanel();
	JLabel companyLabel = new JLabel("       OrderBook Inc.         ");
	JTextField titleTextField = new JTextField(30);
	JTextField quantityTextField = new JTextField(15);
	JTextField priceTextField = new JTextField(15);
	JButton calculateButton = new JButton(" Calculate   ");
	JTextArea outputTextArea = new JTextArea("Your Total Cost:", 10, 25);
	JScrollPane outputScrollPane = new JScrollPane(outputTextArea);
	

	
	
	public static void main(String[] args)
	{
		//create an object of the class and code the close button
		ch4Book myCost = new ch4Book();
		myCost.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	
	public ch4Book()
	{
		designFrame();
	}
	
	public void designFrame()
	{
		//add the components to the mainPanel
		mainPanel.add(companyLabel);
		mainPanel.add(new JLabel("       Title            "));
		mainPanel.add(titleTextField);
		mainPanel.add(new JLabel("    Quantity   "));
		mainPanel.add(quantityTextField);
		mainPanel.add(new JLabel("    Price       "));
		mainPanel.add(priceTextField);
		mainPanel.add(calculateButton);
		mainPanel.add(outputScrollPane);
		
		//add the listeners
		calculateButton.addActionListener(this);
		
		
		//add the panel to the frame
		add(mainPanel);
		setSize(500,500);
		setVisible(true);
		
	}
	
	public void actionPerformed(ActionEvent evt)
	{
		getInput();
		displayOutput();
		clear();
		
	}
	
	public void getInput()
	{
		//input variables

		double  priceDouble;
		int quantityInteger;
		String titleString;
		

		priceDouble = Double.parseDouble(priceTextField.getText());
		quantityInteger = Integer.parseInt(quantityTextField.getText());
		titleString = titleTextField.getText();
		
	    
		//send the input the calculation class
		Cost myTotalCost = new Cost(priceDouble, quantityInteger);
		displayOutput();
		
		
	}
	
	public void displayOutput()
	{
		// object to format to currency
		DecimalFormat formatDecimalFormat = new DecimalFormat("$0.00");
		
		//variables to store the retrieved values from the computation class
		double  subTotalDouble, totalCostDouble;
		int counterInteger;
		
		Cost myTotalCost = new Cost();
	    
	    subTotalDouble = myTotalCost.getSubTotal();
	    totalCostDouble = myTotalCost.getTotalCost();
	    counterInteger = myTotalCost.getCounterInteger();
	    
	    
	    outputTextArea.append('\n' + "Book Title:  " + titleString +
	    		'\n' + " Quantity  " + formatDecimalFormat.format(quantityInteger)+
	    		'\n' + "Number of Customers  " + counterInteger);
	    
		
	}
	
	public void clear()
	{
		titleTextField.setText("");
		quantityTextField.setText("");
		priceTextField.setText("");
	}
}
Problem is, I'm unable to output the variables and objects from getInput()

I'm not sure why.. can someone help me with this?
 

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