I need to have my program take information from text file Plus my pie chart is in wrong place

[laurie Watson]

This is my last class and I am confused i really need a good grade to pass the class I need it to reaad a file then show a pie chart heres the first part of the code i will also include my piechart code and text file thanks for your help its due tonight

/*/** Mortgage Calculator Program
  * Week 5 PRG421
  *Change Request #7
 High-Level Requirements

 Requestor:  Ninfa Pendleton - Rapid City, SD
 Write the program in Java (with a graphical user interface)
 * and have it calculate and display the mortgage payment amount from user input
 of the amount of the mortgage and the user's selection from a menu of available mortgage loans:
 * 5 years at 5%
 * 7 years at 5.35%
  15 years at 5.5 %
  30 years at 5.75%
 *
 * 35 years at 5.85%

 Use an array for the mortgage data for the different loans.
Read the year and interest rates to fill the array from a sequential file.
 Display the mortgage payment amount followed by the loan balance and interest paid
 for each payment over the term of the loan. Add graphics in the form of a chart
(functioning pie chart or bar graph, that shows loan principal, total interest, and total amount paid over loan).
Allow the user to loop back and enter a new amount and make a new selection or quit.
 Please insert comments in the program to document the program.
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 * Laurie Watson
 * June 27,2011
 */

import java.awt.*;
 import javax.swing.*;
 import java.awt.event.*;
 import java.io.*;
 import java.text.*;
 import java.util.*;
 //declare calculator class
 public class Calculator extends JFrame {
     // Holds years, interest rate strings read from file
     ArrayList<String> standardTerms = new ArrayList<String>();
     String[] rates;
     String[] years;
     private JLabel amountLabel = new JLabel("Mortgage Amount:");
    private JTextField amount = new JTextField();
    private JLabel termLabel = new JLabel("Term of Loan:");
    private JTextField term = new JTextField();
    private JLabel rateLabel = new JLabel("Rate: ('0.0525')");
     private JTextField rate = new JTextField();
     private JComboBox termList = new JComboBox();
     private JLabel payLabel = new JLabel("Monthly Payment:");
     private JLabel payment = new JLabel();
     private JButton calculate = new JButton("Calculate");
     private JButton clear = new JButton("Clear");
     private JButton exit = new JButton("Exit");
     private JTextArea paymentSchedule = new JTextArea();
     private JScrollPane schedulePane = new JScrollPane(paymentSchedule);
     private JLabel displayChart = new JLabel("Mortgage Graph");
    private Container cp = getContentPane();

    public Calculator(String title) {
        super.setTitle(title);
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         getStandardLoanTermsFromFile();

        termList.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JComboBox cb = (JComboBox) e.getSource();
                    int cbIndex = cb.getSelectedIndex();

                 if (cbIndex > -1) {
                     String[] parts = standardTerms.get(cbIndex).split(",");
                     term.setText(years[cbIndex]);
                    rate.setText(rates[cbIndex]);
                 }
            }
         });
 //handle the button events

calculate.addActionListener(new ActionListener() {
     public void actionPerformed(ActionEvent e) {
        try {
             //calculate the payments.
             double p = Double.parseDouble(amount.getText());
             double r = Double.parseDouble(rate.getText()) / 12;
             double n = Integer.parseInt(term.getText()) * 12;
             double monthlyPayment = p * Math.pow(1 + r, n) * r / (Math.pow(1 + r, n) - 1);
             DecimalFormat df = new DecimalFormat("$###,###.00");
             payment.setText(df.format(monthlyPayment));

             //calculate the loan information
            double principal = p;
             int month;
             StringBuffer buffer = new StringBuffer();
            buffer.append("Month\tAmount\tInterest\tBalance\n");

           for (int i = 0; i < n; i++) {
                month = i + 1;
                 double interest = principal * r;
                double balance = principal + interest - monthlyPayment;
                 buffer.append(month + "\t");
                buffer.append(new String(df.format(principal)) + "\t");
                buffer.append(new String(df.format(interest)) + "\t");
                 buffer.append(new String(df.format(balance)) + "\n");
                 principal = balance;
            }
            paymentSchedule.setText(buffer.toString());

             DisplayChart component = new DisplayChart(p, r);
            add(component);
        } catch (Exception ex) {
             System.out.println(ex);
         }
     }
 });

         clear.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                 term.setText("");
                 rate.setText("");
                 amount.setText("");
                 payment.setText("");
                 paymentSchedule.setText("");
             }
         });

         exit.addActionListener(new ActionListener() {
             public void actionPerformed(ActionEvent e) {
                 System.exit(1);
             }
         });

         JPanel calcScreen = new JPanel();
         calcScreen.setLayout(new GridLayout(10, 4));
         calcScreen.add(amountLabel);
         calcScreen.add(amount);
         calcScreen.add(new Label("Select Mortgage Terms from List or enter manually"));
         calcScreen.add(termList);
         calcScreen.add(termLabel);
         calcScreen.add(term);
         calcScreen.add(rateLabel);
        calcScreen.add(rate);
        calcScreen.add(payLabel);
         calcScreen.add(payment);

         JPanel buttons = new JPanel();
         buttons.setLayout(new BoxLayout(buttons, BoxLayout.X_AXIS));
         buttons.add(calculate);
         buttons.add(clear);
         buttons.add(exit);

       JPanel component = new JPanel();
        add(component);
         JPanel calc = new JPanel();
         calc.setLayout(new BoxLayout(calc, BoxLayout.Y_AXIS));
         calc.add(calcScreen);
         calc.add(buttons);
         cp.add(BorderLayout.NORTH, calc);
         cp.add(BorderLayout.CENTER, schedulePane);
     }

     private void getStandardLoanTermsFromFile() {
         try {
           String line;
            BufferedReader br = new BufferedReader(new FileReader("term.txt"));
            while ((line = br.readLine()) != null) {
                 standardTerms.add(line);
                termList.addItem(line);
            }
             br.close();
             int numberOfLoans = standardTerms.size();

            //allocate the arrays
             rates = new String[numberOfLoans];
            years = new String[numberOfLoans];
             String [] temp;

             for (int index = 0; index < numberOfLoans; index ++)
                {
                     temp = standardTerms.get(index).split(",");

                 years[index] = temp[0];
                 rates[index] = temp[1];
             }
        } catch (Exception ex) {
            System.out.println(ex.toString());
        }
     }

     public static void main(String[] args) {
     Calculator frame = new Calculator("Mortgage Calculator");
      frame.setSize(800, 900);
      frame.setVisible(true);
    }
     }

the pie chart code

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 *Laurie Watson
 */
import java.awt.*;

import javax.swing.JPanel;
class DisplayChart extends JPanel {
     private double totalinterestpercentage;
     private double interest;
     private double interestdegrees;

     public DisplayChart(Double loan, Double rate) {

         totalinterestpercentage = loan * interest;
         interest = rate * 1200.0;
         interestdegrees = 360 * totalinterestpercentage / 100;

         JPanel dc = new JPanel();
         add(dc);
     }

    @Override
     public void paint(Graphics comp) {
         Graphics2D comp2D = (Graphics2D) comp;
         comp.setColor(Color.black);
         comp.fillRect(0, 0, 300, 400);
         comp.setColor(Color.red);
         comp.fillRect(40, 300, 15, 15);
         comp.setColor(Color.white);
         comp.drawString("Total Mortgage Principal  "+ (100 - (int)totalinterestpercentage) + " %",60,312);
          comp.drawString("Total Mortgage Interest  "+ (int)interest + " %",60,337);
         comp.setColor(Color.blue);
         comp.fillRect(40, 325, 15, 15);
         comp.setColor(Color.red);
         comp.fillArc(50, 50, 200, 90, 360, 270);
        comp.setColor(Color.blue);
          comp.fillArc(50, 50, 200, 200, 90, (int) interestdegrees);
         setBackground(Color.black);
     }
 }

it won't allow me to post a txt document here but is not reading my text document and my pie chart sets on top of my readout how do I move it

[Jesper de Jong]

Welcome to the Ranch.

Did you write all that code yourself? What exactly is your question about it? It's a lot of code to look through. If you have a specific problem with it, then explain, preferrably with a short piece of code, what you don't understand.

Also, please use a meaningful title for your posts instead of something like "Please help".

[laurie Watson]

I'm not sure where the problem is it is not reading my external file.
I think the problem may be here but I am not sure


String line;

BufferedReader br = new BufferedReader(new FileReader("loanterms.txt"));

while ((line = br.readLine()) != null) { standardTerms.add(line);

termList.addItem(line);

}

br.close();


int numberOfLoans = standardTerms.size();

//allocate the arrays

rates = new String[numberOfLoans];

years = new String[numberOfLoans];

String [] temp;


for (int index = 0; index < numberOfLoans; index ++)

{

temp = standardTerms.get(index).split(",");



years[index] = temp[0];

rates[index] = temp[1];
}

} catch (Exception ex) {

System.out.println(ex.toString());

}

}

I also do not know how to position my pie chart so it is not on top of the rest of the readout thanks

[Campbell Ritchie]

Jesper de Jong wrote: . . . It's a lot of code to look through. . . .

It's even worse with the double-spacing, which I have got rid of; that makes it harder to read.

Why have you got so many fields in your classes? Most of those buttons and components could be local variables in your constructor.

Also, I think this thread would sit better in our GUIs forum, so I shall move it.

[laurie Watson]

okay I got it to read my text file but it won't calculate from those choices i will calculate the data i input still have the piechart problem.

I think this is the code you need
calculate.addActionListener(new ActionListener() {

 public void actionPerformed(ActionEvent e) {
        try {
             //calculate the payments.
             double p = Double.parseDouble(amount.getText());
             double r = Double.parseDouble(rate.getText()) / 12;
             double n = Integer.parseInt(term.getText()) * 12;
             double monthlyPayment = p * Math.pow(1 + r, n) * r / (Math.pow(1 + r, n) - 1);
             DecimalFormat df = new DecimalFormat("$###,##0.00");
             payment.setText(df.format(monthlyPayment));

            //calculate the loan information

            double principal = p;
             int month;
             StringBuilder buffer = new StringBuilder();
            buffer.append("Month\tAmount\tInterest\tBalance\n");
           for (int i = 0; i < n; i++) {
                month = i + 1;
                 double interest = principal * r;
                 double balance = principal + interest - monthlyPayment;

                 buffer.append(month + "\t");
                buffer.append(new String(df.format(principal)) + "\t");
                buffer.append(new String(df.format(interest)) + "\t");
                 buffer.append(new String(df.format(balance)) + "\n");
                 principal = balance;
            }

             paymentSchedule.setText(buffer.toString());

             DisplayChart component = new DisplayChart(p, r);
            add(component);
        } catch (Exception ex) {
             System.out.println(ex);
         }

     }

I think it has to some how be tied into the combo box but I am not sure how