I am not able to click on the menu choices and have them fill out the form. I also am not certain that it is reading from the text file. Can someone check and let me know what I need to change in this program?
import java.awt.*;
import java.awt.event.*;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.font.*;
import java.awt.Font;
import java.awt.geom.*;
import java.awt.Insets;
import java.awt.LayoutManager;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.Reader;
import java.text.MessageFormat;
import java.text.NumberFormat;
import java.io.FileReader;
import java.io.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.table.DefaultTableModel;
public class Mortgage5 extends JFrame implements ActionListener
{
JLabel Llabel; //amount label
JTextField Ltextfield;//amount textfield
JLabel Olabel;//option label
JComboBox options;//option combobox
JLabel Tlabel;//term label
JTextField Ttextfield;//term textfield
JLabel Rlabel;//rate label
JTextField Rtextfield;//rate textfield
JLabel Plabel; //payment label
JLabel $label; //field for monthly payment amount
JButton calculate; //calculate button
JButton reset; //reset button
JButton end; //end button
JTable table;//create table
JMenuItem mnuExit = new JMenuItem("Exit");
DefaultTableModel model;//table model
int[] trmArray = {7,15,30};
double[] intrstArray = {5.35,5.5,5.75};
JButton graph;
private float[] yearlyPrinciple;
private float[] yearlyInterest;
// header
public Mortgage5()
{
super("Mortgage Payment Calculator");
setDefaultLookAndFeelDecorated(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
load();
init();
pack();
setVisible(true);
// create a instance of a menu
MenuBar mnuMyBar = new MenuBar();
setMenuBar(mnuMyBar);
// constructs File menu and populates
Menu mnuMyFile = new Menu("File",true);
mnuMyBar.add(mnuMyFile);
MenuItem mnuMyFileExit = new MenuItem("Exit");
mnuMyFile.add(mnuMyFileExit);
// constructs File menu and populates
Menu mnuAvailLoans = new Menu("Available Loans", true);
mnuMyBar.add(mnuAvailLoans);
MenuItem mnuAvailLoans1 = new MenuItem("5.35% Interest at 7 Years");
mnuAvailLoans.add(mnuAvailLoans1);
MenuItem mnuAvailLoans2 = new MenuItem("5.50% Interest at 15 Years");
mnuAvailLoans.add(mnuAvailLoans2);
MenuItem mnuAvailLoans3 = new MenuItem("5.75% Interest at 30 Years");
mnuAvailLoans.add(mnuAvailLoans3);
// add ActionListener to menu items
mnuMyFileExit.addActionListener(this);
mnuAvailLoans1.addActionListener(this);
mnuAvailLoans2.addActionListener(this);
mnuAvailLoans3.addActionListener(this);
// add ActionCommand to menu items
mnuMyFileExit.setActionCommand("Exit");
mnuAvailLoans1.setActionCommand("Loans1");
mnuAvailLoans2.setActionCommand("Loans2");
mnuAvailLoans3.setActionCommand("Loans3");
mFrame.setVisible(true);
//exit listener
mnuExit.addActionListener(this); //exitButton
}
//reading from sequential file
public void load()
{
Reader fis = null;
if(fis == null)
return;
{
try
{
fis = new FileReader("rates.txt");
BufferedReader b = new BufferedReader( fis );
String[] line = b.readLine( ).split(",");
trmArray = new int[line.length];
for ( int i = 0; i < line.length; i++ )
{
trmArray[ i ] = Integer.parseInt(line[i].trim());
}
line = b.readLine( ).split(",");
intrstArray = new double[line.length];
for ( int i = 0; i < line.length; i++ )
{
intrstArray[ i ] = Double.parseDouble(line[i].trim());
}
b.close();
fis.close();
}
catch ( Exception e1 )
{
e1.printStackTrace( );
}
}
}
//creates labels, buttons and textfields
public void init()
{
MortgageLayout customLayout = new MortgageLayout();
Container con = getContentPane();
con.setLayout(customLayout);
con.setFont(new Font("Arial", Font.PLAIN, 12));
con.setLayout(customLayout);
Llabel = new JLabel("Mortgage Loan Amount $ (no comma)");//amount label
con.add(Llabel);
Ltextfield = new JTextField("");//amount textfield
con.add(Ltextfield);
Olabel = new JLabel("Preset Term & Interest Rate %");//option label
con.add(Olabel);
options = new JComboBox();
con.add(options);
options.addItem(" (choose rate)");
options.addItem("7 years at 5.35%");
options.addItem("15 years at 5.5%");
options.addItem("30 years at 5.75%");
options.setEnabled(true);
{
options.addItem("");
}
for (int i = 0; i < trmArray.length; i++)
{
options.addItem("");
}
Tlabel = new JLabel("Term (years)");//term label
con.add(Tlabel);
Ttextfield = new JTextField("");//term textfield
con.add(Ttextfield);
Rlabel = new JLabel("Interest Rate");//rate label
con.add(Rlabel);
Rtextfield = new JTextField("");//rate textfield
con.add(Rtextfield);
Plabel = new JLabel("Monthly Payment Amount");//payment label
con.add(Plabel);
$label = new JLabel("");//payment textfield
con.add($label);
calculate = new JButton("Calculate");//calculate button
con.add(calculate);
calculate.setBackground(Color.green);
reset = new JButton("Reset");//reset button
con.add(reset);
reset.setBackground(Color.yellow);
end = new JButton ("End");//end button
con.add(end);
end.setBackground(Color.red);
//table header names
String[] columnNames = {"Payment #","Payment Amount", "Interest", "Principle Reduction",
"Remaining Balance"};
//create table and table model
model = new DefaultTableModel(columnNames, 0);
table = new JTable(model);
JScrollPane scroll = new JScrollPane(table);
table.setPreferredScrollableViewportSize(new Dimension (10, 600));
con.add (scroll);
graph = new JButton ("Display Graph");//Display Graph button
con.add(graph);
graph.setBackground(Color.blue);
//action listeners
Ltextfield.addActionListener(this); //loanfield
options.addActionListener(this); //interestfield
calculate.addActionListener(this); //calButtion
reset.addActionListener(this); //resetButton
end.addActionListener(this); //endButton
graph.addActionListener(this); //graphButton
}
//action event from listeners
public void actionPerformed(ActionEvent event)
{
Object source = event.getSource();
if (source == calculate)
{
startCalculations();
}
if (source == reset)
{
reset();
}
if (source==options)
{
setRate();
}
if (source == end)
{
exit();
}
if (source == mnuExit)
{
exitGraph();
}
if (source == graph)
{
mFrame = new JFrame("Mortgage Graph");
mFrame.getContentPane().add(new GraphP(yearlyPrinciple, yearlyInterest));
mFrame.setSize(800,600);
mFrame.setLocation(200,100);
// create a instance of a menu
MenuBar mnuMyBar = new MenuBar();
setMenuBar(mnuMyBar);
// constructs File menu and populates
Menu mnuMyFile = new Menu("File",true);
mnuMyBar.add(mnuMyFile);
MenuItem mnuMyFileExit = new MenuItem("Exit");
mnuMyFile.add(mnuMyFileExit);
mFrame.setVisible(true);
//exit listener
mnuExit.addActionListener(this); //exitButton
}
}
public JFrame mFrame = new JFrame();
void exitGraph()
{
mFrame.dispose();
mFrame = null;
}
void setRate()
{
int index = options.getSelectedIndex();
//term and interest error check
if (index > 0)
{
try
{
Ttextfield.setText(Integer.toString(trmArray[index-1]));
}
catch (NumberFormatException e)
{
JOptionPane.showMessageDialog(null, "Invalid or missing Loan Term. Please try again!",
"Message Dialog", JOptionPane.PLAIN_MESSAGE);
Ttextfield.setText(null);
}
try
{
Rtextfield.setText(Double.toString(intrstArray[index-1]));
}
catch (NumberFormatException e)
{
JOptionPane.showMessageDialog(null, "Invalid or missing Interest Rate. Please try again!",
"Message Dialog", JOptionPane.PLAIN_MESSAGE);
Rtextfield.setText(null);
}
}
}
//calculation section
void startCalculations()
{
Thread thisThread = Thread.currentThread();
NumberFormat currency = NumberFormat.getCurrencyInstance();
double amt = 0;
double trm = 0;
double intrst = 0;
double moIn = 0;
double moTrm = 0;
double prin = 0;
double paymt = 0;
//amount error check
try
{
amt = Double.parseDouble(Ltextfield.getText());
}
catch (NumberFormatException e)
{
JOptionPane.showMessageDialog(null, "Missing Amount or Use of Commas",
"Message Dialog", JOptionPane.PLAIN_MESSAGE);
Ltextfield.setText(null);
Ttextfield.setText(null);
Rtextfield.setText(null);
options.setSelectedIndex(0);
}
//term and interest error check
try
{
trm = Double.parseDouble(Ttextfield.getText());
}
catch (NumberFormatException e)
{
JOptionPane.showMessageDialog(null, "Invalid or missing Loan Term. Please try again!",
"Message Dialog", JOptionPane.PLAIN_MESSAGE);
Ttextfield.setText(null);
}
try
{
intrst = Double.parseDouble(Rtextfield.getText());
}
catch (NumberFormatException e)
{
JOptionPane.showMessageDialog(null, "Invalid or missing Interest Rate. Please try again!",
"Message Dialog", JOptionPane.PLAIN_MESSAGE);
Rtextfield.setText(null);
}
if (amt > 0)
{
amt = Double.parseDouble(Ltextfield.getText());
moIn = (intrst / 1200);//monthly interest rate
moTrm = trm * 12;//number of payments
paymt = (amt * moIn) / (1-Math.pow((1+moIn), -moTrm));//amount forumla
yearlyPrinciple = new float[(int)trm]; // initialize the arrays to store yearly principle and interest
yearlyInterest = new float[(int)trm];
$label.setText("" + currency.format(paymt));
double newPrin = amt;
for (int i = 0; i < trm; i++)
{
yearlyInterest[i] = 0.0f; //start at 0.0
yearlyPrinciple[i] = 0.0f; //start at 0.0
for(int j = 1; j <=12; j++)
{
double newIn = moIn * newPrin;//monthly interest amount
double reduct = paymt - newIn;//monthly principle
yearlyInterest[i] += newIn; // accumalate the interest
yearlyPrinciple[i] += reduct; //accumalate the principle
newPrin = newPrin - reduct;//balance
//stops showing negative balance
if (newPrin < 0)
newPrin = 0;
else
newPrin = newPrin;
//inserts different amounts into the table
model.addRow(new Object[] { Integer.toString((i*12) + j), currency.format(paymt),
currency.format(newIn), currency.format(reduct), currency.format(newPrin) });
}
//for testing purposes only
// model.addRow(new Object[] { Integer.toString(i), currency.format(0.0),
// currency.format(yearlyInterest[i]), currency.format(yearlyPrinciple[i]), currency.format(0.0) });
}
}
//less than 0 error check
if (amt < 0)
{
JOptionPane.showMessageDialog(null, "Please Enter Positive Numbers Only.",
"Message Dialog", JOptionPane.PLAIN_MESSAGE);
Ltextfield.setText(null);
}
}
//resets all fields
void reset()
{
Ltextfield.setText(null);
Ttextfield.setText(null);
Rtextfield.setText(null);
options.setSelectedIndex(0);
$label.setText(null);
model.setRowCount(0);
}
//exit the program with thank you message
void exit()
{
JOptionPane.showMessageDialog(null, " Thank you for using \n Mortgage Calculator",
"Message Dialog", JOptionPane.PLAIN_MESSAGE);
System.exit(0);
}
public static void main(String args[])
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
new Mortgage5().setVisible(true);
}
});
}
}
//creates class for container layout and placement
class MortgageLayout implements LayoutManager{
public MortgageLayout() {}
public void addLayoutComponent(String name, Component comp) {}
public void removeLayoutComponent(Component comp) {}
public Dimension preferredLayoutSize(Container parent)
{
Dimension dim = new Dimension(0, 0);
Insets insets = parent.getInsets();
dim.width = 600 + insets.left + insets.right;
dim.height = 425 + insets.top + insets.bottom;
return dim;
}
public Dimension minimumLayoutSize(Container parent)
{
Dimension dim = new Dimension(0, 0);
return dim;
}
public void layoutContainer(Container parent)
{
Insets insets = parent.getInsets();
Component c;
c = parent.getComponent(0);
if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+8,250,24);}
c = parent.getComponent(1);
if (c.isVisible()) {c.setBounds(insets.left+300,insets.top+8,175,24);}
c = parent.getComponent(2);
if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+40,250,24);}
c = parent.getComponent(3);
if (c.isVisible()) {c.setBounds(insets.left+300,insets.top+40,150,24);}
c = parent.getComponent(4);
if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+72,250,24);}
c = parent.getComponent(5);
if (c.isVisible()) {c.setBounds(insets.left+300,insets.top+72,96,24);}
c = parent.getComponent(6);
if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+104,250,24);}
c = parent.getComponent(7);
if (c.isVisible()) {c.setBounds(insets.left+300,insets.top+104,112,24);}
c = parent.getComponent(8);
if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+136,250,24);}
c = parent.getComponent(9);
if (c.isVisible()) {c.setBounds(insets.left+300,insets.top+136,112,24);}
c = parent.getComponent(10);
if (c.isVisible()) {c.setBounds(insets.left+50,insets.top+168,96,24);}
c = parent.getComponent(11);
if (c.isVisible()) {c.setBounds(insets.left+225,insets.top+168,112,24);}
c = parent.getComponent(12);
if (c.isVisible()) {c.setBounds(insets.left+400,insets.top+168,96,24);}
c = parent.getComponent(13);
if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+200,575,160);}
c = parent.getComponent(14);
if (c.isVisible()) {c.setBounds(insets.left+225,insets.top+375,112,24);}
}
}
class GraphP extends JPanel
{
final int
HPAD = 60,
VPAD = 40;
int[] data;
Font font;
float[] principleData;
float[] interestData;
public GraphP(float[] p, float[] i)
{
principleData = p;
interestData = i;
font = new Font("lucida sans regular", Font.PLAIN, 16);
setBackground(Color.white);
}
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D g2 = (Graphics2D)g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g2.setFont(font);
FontRenderContext frc = g2.getFontRenderContext();
int w = getWidth();
int h = getHeight();
// scales
float xInc = (w - HPAD - VPAD) / (interestData.length - 1);//11f; //distance between each plot
float yInc = (h - 2*VPAD) / 10f;
int[] dataVals = getDataVals(); //min and max values for y-axis
float yScale = dataVals[2] / 10f;
// ordinate (y - axis)
g2.draw(new Line2D.Double(HPAD, VPAD, HPAD, h - VPAD));
// plot tic marks
float x1 = HPAD, y1 = VPAD, x2 = HPAD - 3, y2;
for(int j = 0; j < 10; j++)
{
g2.draw(new Line2D.Double(x1, y1, x2, y1));
y1 += yInc;
}
// labels
String text; LineMetrics lm;
float xs, ys, textWidth, height;
for(int j = 0; j <= 10; j++)
{
text = String.valueOf(dataVals[1] - (int)(j * yScale));
textWidth = (float)font.getStringBounds(text, frc).getWidth();
lm = font.getLineMetrics(text, frc);
height = lm.getAscent();
xs = HPAD - textWidth - 7;
ys = VPAD + (j * yInc) + height/2;
g2.drawString(text, xs, ys);
}
// abcissa (x - axis)
g2.draw(new Line2D.Double(HPAD, h - VPAD, w - VPAD, h - VPAD));
// tic marks
x1 = HPAD; y1 = h - VPAD; y2 = y1 + 3;
for(int j = 0; j < interestData.length; j++)
{
g2.draw(new Line2D.Double(x1, y1, x1, y2));
x1 += xInc;
}
// labels
ys = h - VPAD;
for(int j = 0; j < interestData.length; j++)
{
text = String.valueOf(j + 1);
textWidth = (float)font.getStringBounds(text, frc).getWidth();
lm = font.getLineMetrics(text, frc);
height = lm.getHeight();
xs = HPAD + j * xInc - textWidth/2;
g2.drawString(text, xs, ys + height);
}
// plot data
float yy2 = 0, yy1 = 0, xx2 = 0, xx1;
x1 = HPAD;
xx1 = HPAD;
yScale = (float)(h - 2*VPAD) / dataVals[2];
for(int j = 0; j < interestData.length; j++)
{
g.setColor(Color.blue);
y1 = VPAD + (h - 2*VPAD) - (principleData[j] - dataVals[0]) * yScale;
if(j > 0)
g2.draw(new Line2D.Double(x1, y1, x2, y2));
x2 = x1;
y2 = y1;
x1 += xInc;
g.setColor(Color.red);
yy1 = VPAD + (h - 2*VPAD) - (interestData[j] - dataVals[0]) * yScale;
if(j > 0)
g2.draw(new Line2D.Double(xx1, yy1, xx2, yy2));
xx2 = xx1;
yy2 = yy1;
xx1 += xInc;
}
}
private int[] getDataVals()
{
int max = Integer.MIN_VALUE;
int min = Integer.MAX_VALUE;
int j = interestData.length -1;
max = (int)principleData[j];
min = (int)interestData[j];
int span = max - min;
return new int[] { min, max, span };
}
}rate.txt
7,5.35
15,5.5
30,5.75
