DaniWeb IT Discussion Community

Hello everyone,

I'm at a loss. I've been trying to add a couple of images to my mortgage loan program for class. Everything I try either doesn't work or blanks out the screen. Any help would be appreciated:

/*
* Author: Diana Salisbury
* Week: 4
* Date: March 20, 2006
* Filename: MortPayCal.java
* Purpose: This project will display a graphical user interface that calculates
a mortgage payment amount and amortization schedule from user input amounts, terms, and interest rates. The three combinations of terms and interest rates for the loan are loaded from a file.
*/

import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.text.NumberFormat;
import java.text.DecimalFormat;
import java.io.*;
import javax.swing.JOptionPane;
import java.lang.*;
import java.util.Arrays;

public class MortCalAmtDLSWK5Image extends JFrame implements ActionListener
{

//declare layout components
JPanel contentPane = new JPanel();
JLabel instructionLabel = new JLabel();
JLabel instructionLabel2 = new JLabel();
JLabel instructionLabel3 = new JLabel();
JLabel termLabel = new JLabel();
JLabel rateLabel = new JLabel();
JLabel paymentLabel = new JLabel();
JLabel salaryLabel = new JLabel();
JLabel salaryFormatLabel = new JLabel();
JLabel qualifyLabel = new JLabel();
JLabel amountLabel = new JLabel();
JLabel amountFormatLabel = new JLabel();
JLabel calcLabel = new JLabel();
JLabel tableLabel = new JLabel();

//declare text fields

JTextField termField = new JTextField(20);
JTextField rateField = new JTextField(20);
JTextField amountField = new JTextField(20);
JTextField salaryField = new JTextField(20);
JTextField paymentField= new JTextField(20);
JTextField qualifyField = new JTextField(20);

//declare variable for images and images
int qualify = 0;
Image homeImage = Toolkit.getDefaultToolkit().getImage("home.jpg");
Image noImage = Toolkit.getDefaultToolkit().getImage("no.jpg");
//Icon icon = new ImageIcon("home.jpg");
// JButton homeButton = new JButton();

//Icon icon2 = new ImageIcon("no.jpg");
//JButton noButton = new JButton();

//declare variables and array
String[] FileArray = new String[6];

//declare button objects
JButton clearButton = new JButton();
JButton calcButton = new JButton();
JButton quitButton = new JButton();

//declare text area for amortization
JTextArea amortTextArea = new JTextArea();
JTextArea testTextArea = new JTextArea();

//declare scroll bar for amortization table
JScrollPane scrollPane = new JScrollPane(amortTextArea,ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);

public MortCalAmtDLSWK5Image()
{
//Set up the frame features
super("Mortgage Payment Calculator");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);

try
{
//Create the file reading object
BufferedReader reader = new BufferedReader(new FileReader("e:\\LoanChoices.txt"));

for (int i = 0; i<6; i++)
{
// Read from the file
FileArray[i] = reader.readLine( );
}

//close file
reader.close();
}

catch (IOException e)
{
System.out.println("There was an input/output error.");
}

int intTerm1=Integer.parseInt(FileArray[0]);
double dblInterest1=Double.parseDouble(FileArray[1]);
int intTerm2=Integer.parseInt(FileArray[2]);
double dblInterest2=Double.parseDouble(FileArray[3]);
int intTerm3=Integer.parseInt(FileArray[4]);
double dblInterest3=Double.parseDouble(FileArray[5]);

// Create Menu
MenuBar mnuBar=new MenuBar();
setMenuBar(mnuBar);

Menu mnuFile = new Menu("File",true);
mnuBar.add(mnuFile);
MenuItem mnuExit = new MenuItem("Exit");
mnuFile.add(mnuExit);

Menu mnuRateTerm = new Menu("Rate and Term",true);
mnuBar.add(mnuRateTerm);
MenuItem mnuChoice1 = new MenuItem(FileArray[0] + "% and " + FileArray[1] + " Years");
mnuRateTerm.add(mnuChoice1);
MenuItem mnuChoice2 = new MenuItem(FileArray[2] + "% and " + FileArray[3] + " Years");
mnuRateTerm.add(mnuChoice2);
MenuItem mnuChoice3 = new MenuItem(FileArray[4] + "% and " + FileArray[5] + " Years");
mnuRateTerm.add(mnuChoice3);

// add the ActionListener to each menu
mnuExit.addActionListener(this);
mnuChoice1.addActionListener(this);
mnuChoice2.addActionListener(this);
mnuChoice3.addActionListener(this);

// set command actions
mnuExit.setActionCommand("Exit");
mnuChoice1.setActionCommand("Choice1");
mnuChoice2.setActionCommand("Choice2");
mnuChoice3.setActionCommand("Choice3");

instructionLabel.setText("Input the term, rate, and amount fields in the appropriate fields.");
instructionLabel.setFont(new Font("Century",Font.ITALIC,14));
instructionLabel2.setText("OR");
instructionLabel2.setFont(new Font("Century",Font.BOLD + Font.ITALIC,18));
instructionLabel3.setText("Select a predefined term and rate from the Window option above & input amount.");
instructionLabel3.setFont(new Font("Century",Font.ITALIC,14));
amountField.requestFocusInWindow(); //set focus on amount field
termLabel.setText("Enter term length in years:");
rateLabel.setText("Enter interest rate:");
salaryLabel.setText("Enter your yearly salary:");
salaryFormatLabel.setText("Enter salary to nearest whole dollar.");
salaryFormatLabel.setFont(new Font("Century",Font.ITALIC,12));
calcLabel.setText("Press Calculate to determine monthly payment or Clear to start all over.");
calcLabel.setFont(new Font("Century",Font.ITALIC,14));
amountLabel.setText("Enter mortgage amount:");
amountFormatLabel.setText("Enter mortgage amountto the nearest whole dollar.");
amountFormatLabel.setFont(new Font("Century",Font.ITALIC,12));
calcButton.setText("Calculate"); //define calculate button
calcButton.addActionListener(this); //set action listener for calculate button
paymentLabel.setText("Monthly payment:"); //define monthly payment label
paymentField.setEditable(false); //set monthly payment field to not be editable
qualifyField.setText("");
qualifyField.setEditable(false); //set qualify field to not be editable
clearButton.setText("Clear"); //define clear button
clearButton.addActionListener(this); //set action listener for clear button
quitButton.setText("Quit"); //define quit button
quitButton.addActionListener(this); //set action listener for quit button
tableLabel.setText("Amoritization Table");

//add components to content
getContentPane().add(contentPane);
contentPane.setLayout(null);

addComponent(contentPane, instructionLabel, 50,10,450,26);
addComponent(contentPane, instructionLabel2, 250,30,450,26);
addComponent(contentPane, instructionLabel3, 50,50,550,26);
addComponent(contentPane, termLabel, 35,75,200,30);
addComponent(contentPane, termField, 195,75,25,20);
addComponent(contentPane, rateLabel, 35,100,200,30);
addComponent(contentPane, rateField, 195,100,40,20);
addComponent(contentPane, amountLabel, 35,125,220,25);
addComponent(contentPane, amountField, 195,125,75,25);
addComponent(contentPane, amountFormatLabel, 275,120,300,30);
addComponent(contentPane, salaryLabel, 35,150,250,25);
addComponent(contentPane, salaryField, 195,150,75,25);
addComponent(contentPane, salaryFormatLabel, 275,150,300,25);
addComponent(contentPane, calcLabel, 35,175,500,30);
addComponent(contentPane, calcButton, 100,215,100,30);
addComponent(contentPane, clearButton, 250,215,100,30);
addComponent(contentPane, quitButton, 400,215,100,30);
addComponent(contentPane, paymentLabel, 35,275,200,30);
addComponent(contentPane, paymentField, 150,275,75,20);
addComponent(contentPane, qualifyField, 300,260,125,40);
addComponent(contentPane, tableLabel, 200,325,300,26);
addComponent(contentPane, scrollPane, 50,325,500,300);

addWindowListener(new WindowAdapter()

{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});

pack();
}

//method to add components
private void addComponent(Container container, Component c, int x, int y, int width, int height)
{

//get the image from the file
c.setBounds(x, y, width, height);
container.add(c);
}

//action performed method
public void actionPerformed(ActionEvent event)
{
String arg = event.getActionCommand();
if (arg == "Exit")
{
System.exit(0);
}

if (arg == "Choice1")
{
rateField.setText(FileArray[1]);
termField.setText(FileArray[0]);
}

if (arg == "Choice2")
{
rateField.setText(FileArray[3]);
termField.setText(FileArray[2]);
}

if (arg == "Choice3")
{
rateField.setText(FileArray[5]);
termField.setText(FileArray[4]);
}

Object source = event.getSource();

if (source == calcButton)
{
Calculate();
}

if (source == clearButton)
{
Clear();
}

if (source == quitButton)
{
Exit();
}

}

void Calculate()
{
//calculation variables
NumberFormat currency = NumberFormat.getCurrencyInstance();

double totalMonths = 0; //total months
double Loan = 0.0; //amount of loan
double MonthlyInterest = 0.0; //monthly interest rate
double Payment = 0.0; //calculate payment
double monthlyPayment = 0.0; //calculate monthly payment
double Interest = 0.0; //variable for Interest Array input
double Term = 0; //variable for Term Array input
double NewMonthlyInterest = 0.0; //new interest amount
double NewLoan = 0.0; //new loan amount
double Reduction = 0.0; //principle reduction
double salary = 0.0; //yearly salary
double monthlySalary = 0.0; //monthly salary
double perSal = 0.0; //28% of salary

//validate input
try
{
Interest = Double.parseDouble(rateField.getText());
}

catch (NumberFormatException e)
{
JOptionPane.showMessageDialog(null,"Invalid entry. Please enter valid rate (without percent symbol).","Error",JOptionPane.WARNING_MESSAGE);

//clears fields after error message
rateField.setText("");
rateField.requestFocusInWindow();
}

try
{
Term = Double.parseDouble(termField.getText());
}

catch (NumberFormatException e)
{
JOptionPane.showMessageDialog(null,"Invalid Entry. Please enter valid term in years.", "Error", JOptionPane.WARNING_MESSAGE);

//resets input fields after error message
termField.setText("");
termField.requestFocusInWindow();
}
try
{
Loan = Double.parseDouble(amountField.getText());
}

catch (NumberFormatException e)
{
JOptionPane.showMessageDialog(null,"Invalid Entry. Please enter valid loan amount.", "Error", JOptionPane.WARNING_MESSAGE);

//resets input fields after error message
amountField.setText("");
amountField.requestFocusInWindow();
}
try
{
salary = Double.parseDouble(salaryField.getText());
}

catch (NumberFormatException e)
{
JOptionPane.showMessageDialog(null,"Invalid Entry. Please enter valid yearly salary.", "Error", JOptionPane.WARNING_MESSAGE);

//resets input fields after error message
termField.setText("");
termField.requestFocusInWindow();
}

//calculations
if (Loan > 0)
{
MonthlyInterest = (Interest / 12)/100;
totalMonths = Term * 12;
monthlyPayment = Loan * MonthlyInterest *(Math.pow((1 + MonthlyInterest), totalMonths)/(Math.pow((1 + MonthlyInterest), totalMonths)-1));

paymentField.setText("" + currency.format(monthlyPayment));

monthlySalary = salary / 12;
perSal = monthlySalary * .28;

if(perSal >= monthlyPayment)
{
qualifyField.setText("You qualify!");
qualifyField.setFont(new Font("Century", Font.BOLD, 18));
qualifyField.setForeground(Color.red);
qualify = 11;

}
else if(perSal < monthlyPayment)
{
qualifyField.setText("Sorry");
qualifyField.setFont(new Font("Century", Font.BOLD + Font.ITALIC, 30));
qualifyField.setForeground(Color.black);
qualify = 22;

}
}

//send information to amortization text area
amortTextArea.append("Number\t");
amortTextArea.append(" Amount\t");
amortTextArea.append("Interest\t");
amortTextArea.append("Principle\t");
amortTextArea.append("Balance\n");

NewLoan = Loan;

for (int i = 1; i <= totalMonths; i++)
{
NewMonthlyInterest = MonthlyInterest * NewLoan;
Reduction = monthlyPayment - NewMonthlyInterest;
NewLoan = NewLoan - Reduction;

amortTextArea.append(" " + i +"\t");
amortTextArea.append(" " + currency.format(monthlyPayment) + "\t");
amortTextArea.append(" " + currency.format(NewMonthlyInterest)+ "\t");
amortTextArea.append(" " + currency.format(Reduction) + "\t");
amortTextArea.append(" " + currency.format(NewLoan) + "\n");
}

//resets fields if loan amount is less than zero
if((Loan <= 0 || Term <= 0 || Interest <= 0))
{
paymentField.setText("");
amortTextArea.setText("");
setVisible(true);
}
}
public void paint(Graphics g)
{

super.paint(g);

if (qualify == 11)
{
homeImage = Toolkit.getDefaultToolkit().getImage("homeImage.gif");
g.drawImage(homeImage, 0, 0,null);
}

if (qualify == 22)
{
noImage = Toolkit.getDefaultToolkit().getImage("noImage.gif");
g.drawImage(noImage, 0, 0,null);
}
}

void Clear()
{

amountField.setText("");
amountField.requestFocusInWindow();
termField.setText("");
rateField.setText("");
salaryField.setText("");
paymentField.setText("");
qualifyField.setText("");
amortTextArea.setText("");
}

public static void main(String args[])
{
MortCalAmtDLSWK5Image f = new MortCalAmtDLSWK5Image();
f.setTitle("Mortgage Calculator");
f.setBounds(200,50,600,700);
f.setResizable(true);
f.setVisible(true);
}

void Exit()
{
System.exit(0);
}