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08/22/2009 at 07:11PM PDT, ID: 24674189

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5.5

Please Help!!!! Pass Variable to another class

Asked by Kelela8 in New to Java Programming

Tags: Java

I know this is a stupid mistake but I am stuck and can't find it. I can't get my interestP and principalP variable to pass to the other class. I have slowly worked out my other problems. Now I have spent all day trying to figure this out and getting no where.

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             import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
import java.text.*;
import java.util.*;
import java.lang.*;
import javax.swing.border.*;
import javax.swing.JOptionPane;
import javax.swing.JTabbedPane;
import javax.swing.JComponent;
import java.awt.font.*;
import java.awt.geom.*;
import java.awt.image.*;
import java.text.NumberFormat;
 
// Create MortgageCalculator class
public class MortCal5 extends JFrame implements ActionListener
{
	//declare variables
	double principle = 0.0;
	double interest = 0.0;
	int years = 0;
	double months = 0;
	int termArray[] = {7, 15, 30};
 
	double[] rates;
 
	private double intTotal = 0.0;
	private double priTotal = 0.0;
	private double payTotal = 0.0;
 
	 double interestP = 0.0;
	double principalP = 0.0;
 
	double[] values;
	private String[] names;
 
 
 
	JFrame f = new JFrame();
 
	// Text for Mortgage
	JPanel row1 = new JPanel(); // Sets up Panels, Preselect Buttons, and Frame.
	JLabel mortgageLabel = new JLabel("MORTGAGE PAYMENT CALCULATOR",
	JLabel.CENTER);
 
	JPanel row2 = new JPanel(new GridLayout(1, 2));
	JLabel principalLabel = new JLabel("Mortgage Amount $", JLabel.LEFT);
	JTextField principalText = new JTextField(10);
 
	JPanel row3 = new JPanel (new GridLayout(1, 2));
	JLabel termLabel = new JLabel("Mortgage Term (Years)", JLabel.LEFT);
	JTextField termText = new JTextField(3);
 
	JPanel row4 = new JPanel(new GridLayout(1,2));
	JLabel intRateLabel = new JLabel("Interest Rate (%)", JLabel.LEFT);
	JTextField intRateText = new JTextField(5);
 
	JPanel row5 = new JPanel(new GridLayout(1,2));
	JLabel paymentLabel = new JLabel("Monthly Payment $", JLabel.LEFT);
	JTextField paymentText = new JTextField(10);
 
	JPanel row6 = new JPanel(new GridLayout (1, 4));
	JLabel payLabel = new JLabel("Payment", JLabel.LEFT);
	JLabel prinLabel = new JLabel("", JLabel.LEFT);//Left for spacing and future needs
	JLabel intLabel = new JLabel("Interest", JLabel.LEFT);
	JLabel balLabel = new JLabel("Balance", JLabel.LEFT);
 
	// Create buttons to calculate payment, clear payment field and exit program
	JPanel radioPanel = new JPanel();
	JRadioButton button7 = new JRadioButton("7 Years at 5.35%", false);
	JRadioButton button15 = new JRadioButton("15 Years at 5.50%", false);
	JRadioButton button30 = new JRadioButton("30 Years at 5.75%", false);
 
	JPanel button = new JPanel(new FlowLayout(FlowLayout.CENTER, 10, 10));
	JButton calculateButton = new JButton("CALCULATE");
	JButton clearButton = new JButton("CLEAR");
	JButton exitButton = new JButton("EXIT");
 
	JTextArea displayArea = new JTextArea(10, 30);
	JScrollPane scroll = new JScrollPane(displayArea);
 
	JTextArea graphArea = new JTextArea (10, 30);
 
	JButton graphButton = new JButton("DISPLAY GRAPH");
 
	//sets decimal format
	DecimalFormat dollarAmount = new DecimalFormat("0.00");
    DecimalFormat percentAmount = new DecimalFormat("##.##");
 
    DataInputStream istream;
 
	//constructor Builds and displays GUI
	public void frame1()
	{
		this.setTitle("Mortgage Calculator");
		setSize(450, 450);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		Container pane = getContentPane();
		getRates();
 
		Border rowboarder = new EtchedBorder();
 
		pane.add(row1);
		row1.add(mortgageLabel);
		row1.setMaximumSize(new Dimension (10000, row1.getMinimumSize().height));
 
		pane.add(row2);
		row2.add(principalLabel);
		row2.add(principalText);
		row2.setMaximumSize(new Dimension (10000, row2.getMinimumSize().height));
		principalText.setText("200000");
 
		pane.add(row3);
		row3.add(termLabel);
		row3.add(termText);
		row3.setMaximumSize(new Dimension (10000, row3.getMinimumSize().height));
		termText.setEditable(false);
		termText.setText("30");
 
		pane.add(row4);
		row4.add(intRateLabel);
		row4.add(intRateText);
		row4.setMaximumSize(new Dimension (10000, row4.getMinimumSize().height));
		intRateText.setEditable(false);
		intRateText.setText("5.75");
 
		// set Radio Buttons as group so only one can be selected
		ButtonGroup buttonGrp = new ButtonGroup();
		buttonGrp.add(button7);
		buttonGrp.add(button15);
		buttonGrp.add(button30);
 
		//add radio buttons to GUI
		radioPanel.add(button7);
		radioPanel.add(button15);
		radioPanel.add(button30);
		pane.add(radioPanel);
		radioPanel.setMaximumSize(new Dimension(10000,
		radioPanel.getMinimumSize().height));
 
		pane.add(row5);
		row5.add(paymentLabel);
		row5.add(paymentText);
		row5.setMaximumSize(new Dimension (10000, row5.getMinimumSize().height));
		paymentText.setEditable(false);
 
		// Add Buttons for calculate, clear, and exit
		button.add(calculateButton);
		button.add(clearButton);
		button.add(exitButton);
		pane.add(button);
 
		// Add Listeners to buttons
		calculateButton.addActionListener(this);
		clearButton.addActionListener(this);
		exitButton.addActionListener(this);
		button7.addActionListener(this);
		button15.addActionListener(this);
		button30.addActionListener(this);
		graphButton.addActionListener(this);
 
		//Add labels above text box (Amortization)
		pane.add(row6);
		row6.add(payLabel);
		row6.add(balLabel);
		row6.add(intLabel);
		row6.add(prinLabel);//added for spacing and future need
		row6.setMaximumSize(new Dimension (10000, row6.getMinimumSize().height));
 
		pane.add(row6);
 
		scroll.setBorder(BorderFactory.createEtchedBorder());
 
		pane.add(scroll);
 
		pane.add(graphButton);
 
		pane.setLayout(new BoxLayout(pane, BoxLayout.Y_AXIS));
		setContentPane(pane);
		setVisible(true);
 
	}
	//Main method
	public static void main(String[] args)throws ParseException
	{
    	MortCal5 frame = new MortCal5();
    	frame.frame1();
 
    }
 
	//opens the rates.txt file and reads the interest rates into the array
	public void getRates()
	{
	    try
	    {
	      ArrayList<String> arrayRates = new ArrayList<String>();
 
	      BufferedReader inputfile = new BufferedReader(new FileReader("rates.txt"));
	      String data;
 
	      while ((data = inputfile.readLine()) != null)
	      {
	        System.out.println(data);
	        arrayRates.add(data);
	      }
 
	      rates = new double[arrayRates.size()];
	      for (int i = 0; i < rates.length; ++i)
	      {
	         rates[i] = Double.parseDouble(arrayRates.get(i));
	      }
 
	      inputfile.close();
	    }
	    catch(Exception ec)
	    {
	      JOptionPane.showMessageDialog(null,
	      "Could not find the file specified", "Error Message",
	      JOptionPane.ERROR_MESSAGE);
	    }
	  }
 
	//Verifies input for positive number and returns payment amount
	public void actionPerformed(ActionEvent event) {
		if (event.getSource() == button7)
		{
			years = 7;
			for (int i = 0; i < rates.length; ++i)
			{
				interest = rates[0];
	      	}
		}
		else if (event.getSource() == button15)
		{
			years = 15;
			for (int i = 0; i < rates.length; ++i)
			{
				interest = rates[1];
	      	}
		}
		else if (event.getSource() == button30)
		{
			years = 30;
			for (int i = 0; i < rates.length; ++i)
			{
				interest = rates[2];
	      	}
		}
			intRateText.setText(Double.toString(interest));
			termText.setText(Integer.toString(years));
	    	if (event.getSource() == calculateButton)
	   	{
			try
			{
				displayArea.setText(null);
				String principalTest = principalText.getText();
				principle = Double.parseDouble(principalTest);
			if (principle < 1)
			{
				throw new OutOfRangeException();
			}
			}
			catch (NumberFormatException e)
			{
				principalText.setText("Invalid Amount");
				JOptionPane.showMessageDialog(null, "Enter Positive Numbers Only ", "INVALD ENTRY", JOptionPane.ERROR_MESSAGE);
				return;
			}
			catch (OutOfRangeException e)
			{
				principalText.setText("Invalid Amount");
				JOptionPane.showMessageDialog(null, "Enter Positive Numbers Only ", "INVALD ENTRY", JOptionPane.ERROR_MESSAGE);
				return;
			}
				setResultValue();
	        }
	        //clears fields
		    if (event.getSource() == clearButton)
		    {
	        	principalText.setText("");
	        	termText.setText("");
	        	intRateText.setText("");
	        	paymentText.setText("");
	        	displayArea.setText(null);
	        }
	        if (event.getSource() == graphButton)
	        {
				JFrame f = new JFrame("Chart");
				f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
				f.getContentPane().add(new ChartPanel(values, names, "Principle/Interest"));
				f.setSize(400, 300);
				f.setLocation(300,300);
				f.setVisible(true);
				double principleP = 0.0;
				double interestP = 0.0;
				double[] values = new double[2];
				String[] names = new String[2];
 
				values[0] = principleP;
				names[0] = "Principle";
 
				values[1] = interestP;
				names[1] = "Interest";
				System.out.println(interestP);
				f.getContentPane().add(new ChartPanel(values, names, "Principle/Interest"));
    		}
			if (event.getSource() == exitButton)
			{
				System.exit(0);
			}
		}
 
	//Calculates mortgage payment, creates and displays amortization schedule
	public void setResultValue()
	 	{
	   		double amount = Double.parseDouble(principalText.getText());
	   		double term = Double.parseDouble(termText.getText());
	   		double rate = Double.parseDouble(intRateText.getText()) / 100.;
	   		double result = (amount * ( rate/12))/(1-( Math.pow (1/( 1 +(rate/12)), (term*12))));
		    paymentText.setText("" + dollarAmount.format(result));
 
		    double intPaid = 0;
		    double principalPaid = 0;
		    double balance = amount;
		    double monthlyRate = rate / 12;
		    double months = term * 12;
 
 
		    int payment = 1;
 
		    for (int y = 1; y <= term; y++)
		    {
				displayArea.append("");
 
			// Loop to to calculate and display the payment schedule
			for (int m = 0; m < 12; m++)
			{ /* start inner loop */
				intPaid = balance * monthlyRate;
				principalPaid = result - intPaid;
				balance = balance - principalPaid;
 
				displayArea.append("Month " + payment + "\t" + "   " +"   "
				+ dollarAmount.format(balance) + "\t" +"              "
				+ dollarAmount.format(intPaid) + "\n");
				payment++;
	    		displayArea.setCaretPosition(0);
 
	    		intTotal += intPaid;
				priTotal += principalPaid;
				payTotal += result;
 
				interestP = (intTotal)/(payTotal) * 100;
				principalP = (priTotal)/(payTotal) * 100;
						}
 
					}
			System.out.println(intTotal);//temporary to check results of total (will delete)
			System.out.println(priTotal);
				}
 
			}
 
 
//class to extend Exception to validate numbers for negative and 0 input
class OutOfRangeException extends Exception //Burd, B. (2007). Java for Dummies. Indianapolis, IN: Wiley Publishing, Inc..
{
}
 
class ChartPanel extends JPanel {
 
  private double[] values;
  private String[] names;
  private String title;
 
 
 
  public ChartPanel(double[] v, String[] n, String t)
  {
    names = n;
    values = v;
    title = t;
  }
 
  public void paintComponent(Graphics g)
  {
    super.paintComponent(g);
    if (values == null || values.length == 0)
      return;
    double minValue = 0;
    double maxValue = 0;
    for (int i = 0; i < values.length; i++) {
      if (minValue > values[i])
        minValue = values[i];
      if (maxValue < values[i])
        maxValue = values[i];
  }
 
    Dimension d = getSize();
    int clientWidth = d.width;
    int clientHeight = d.height;
    int barWidth = clientWidth / values.length;
 
    Font titleFont = new Font("SansSerif", Font.BOLD, 20);
    FontMetrics titleFontMetrics = g.getFontMetrics(titleFont);
    Font labelFont = new Font("SansSerif", Font.PLAIN, 10);
    FontMetrics labelFontMetrics = g.getFontMetrics(labelFont);
 
    int titleWidth = titleFontMetrics.stringWidth(title);
    int y = titleFontMetrics.getAscent();
    int x = (clientWidth - titleWidth) / 2;
    g.setFont(titleFont);
    g.drawString(title, x, y);
 
    int top = titleFontMetrics.getHeight();
    int bottom = labelFontMetrics.getHeight();
    if (maxValue == minValue)
      return;
    double scale = (clientHeight - top - bottom) / (maxValue - minValue);
    y = clientHeight - labelFontMetrics.getDescent();
    g.setFont(labelFont);
 
    for (int i = 0; i < values.length; i++) {
      int valueX = i * barWidth + 1;
      int valueY = top;
      int height = (int) (values[i] * scale);
      if (values[i] >= 0)
        valueY += (int) ((maxValue - values[i]) * scale);
      else {
        valueY += (int) (maxValue * scale);
        height = -height;
      }
 
      g.setColor(Color.lightGray);
      g.fillRect(valueX, valueY, barWidth - 2, height);
      g.setColor(Color.black);
      g.drawRect(valueX, valueY, barWidth - 2, height);
      int labelWidth = labelFontMetrics.stringWidth(names[i]);
      x = i * barWidth + (barWidth - labelWidth) / 2;
      g.drawString(names[i], x, y);
    }
  }
}

           
         

Attachments:

rates.txt (18 bytes) (File Type Details)

rates.txt file

Keywords: Please Help!!!! Pass Variable to a…

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Please Help!!!! Pass Variable to another class

Asked by Kelela8 in New to Java Programming

Tags: Java

About this solution