1. Integrate a user login page into the following program:

2. Add a way to compare different kinds of mortgages into the program:

3. Add a download button so that a pdf/text document containing the mortgage details can be downloaded

import javax.swing.*;

import javax.swing.table.DefaultTableModel;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

public class MortgageCalculatorGUI extends JFrame implements ActionListener {

// Declare components

private JLabel clientNameLabel, mortgageNameLabel, totalMortgageLabel, downPaymentLabel, yearlyInterestLabel, loanDurationLabel;

private JTextField clientNameField, mortgageNameField, totalMortgageField, downPaymentField, yearlyInterestField, loanDurationField;

private JCheckBox downPaymentIsPercentageCheckBox;

private JButton calculateButton;

private JTable amortizationTable;

private JScrollPane amortizationTableScrollPane;

// Constructor

public MortgageCalculatorGUI() {

super("Mortgage Calculator");

// Initialize components

clientNameLabel = new JLabel("Client Name:");

clientNameField = new JTextField(20);

mortgageNameLabel = new JLabel("Mortgage Name:");

mortgageNameField = new JTextField(20);

totalMortgageLabel = new JLabel("Total Mortgage:");

totalMortgageField = new JTextField(20);

downPaymentLabel = new JLabel("Down Payment:");

downPaymentField = new JTextField(20);

downPaymentIsPercentageCheckBox = new JCheckBox("Percentage", true);

yearlyInterestLabel = new JLabel("Yearly Interest Rate:");

yearlyInterestField = new JTextField(20);

loanDurationLabel = new JLabel("Loan Duration (in years):");

loanDurationField = new JTextField(20);

calculateButton = new JButton("Calculate");

calculateButton.addActionListener(this);

// Set up amortization table

String[] columnNames = {"Month", "Balance", "Payment", "Interest", "Principal"};

DefaultTableModel tableModel = new DefaultTableModel(columnNames, 0);

amortizationTable = new JTable(tableModel);

amortizationTableScrollPane = new JScrollPane(amortizationTable);

// Set up layout using GridBagLayout for more flexibility

setLayout(new GridBagLayout());

GridBagConstraints c = new GridBagConstraints();

// Add components to the frame using GridBagLayout constraints

c.gridx = 0;

c.gridy = 0;

add(clientNameLabel, c);

c.gridx = 1;

c.gridy = 0;

add(clientNameField, c);

c.gridx = 0;

c.gridy = 1;

add(mortgageNameLabel, c);

c.gridx = 1;

c.gridy = 1;

add(mortgageNameField, c);

c.gridx = 0;

c.gridy = 2;

add(totalMortgageLabel, c);

c.gridx = 1;

c.gridy = 2;

add(totalMortgageField, c);

c.gridx = 0;

c.gridy = 3;

add(downPaymentLabel, c);

c.gridx = 1;

c.gridy = 3;

add(downPaymentField, c);

c.gridx = 2;

c.gridy = 3;

add(downPaymentIsPercentageCheckBox, c);

c.gridx = 0;

c.gridy = 4;

add(yearlyInterestLabel, c);

c.gridx = 1;

c.gridy = 4;

add(yearlyInterestField, c);

c.gridx = 0;

c.gridy = 5;

add(loanDurationLabel, c);

c.gridx = 1;

c.gridy = 5;

add(loanDurationField, c);

c.gridx = 0;

c.gridy = 6;

add(calculateButton, c);

c.gridx = 0;

c.gridy = 7;

c.gridwidth = 3;

add(amortizationTableScrollPane, c);

// Set up frame

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

pack();

setVisible(true);

}

// Event handler

@Override

public void actionPerformed(ActionEvent e) {

if (e.getSource() == calculateButton) {

// Get values from text fields

String clientName = clientNameField.getText();

String mortgageName = mortgageNameField.getText();

double totalMortgage = Double.parseDouble(totalMortgageField.getText());

double downPayment = Double.parseDouble(downPaymentField.getText());

double yearlyInterest = Double.parseDouble(yearlyInterestField.getText());

int loanDuration = Integer.parseInt(loanDurationField.getText());

// Calculate values

double monthlyInterest = yearlyInterest / 12;

double monthlyPayment = totalMortgage * monthlyInterest / (1 - Math.pow(1 + monthlyInterest, -loanDuration * 12));

double totalPayment = monthlyPayment * loanDuration * 12;

double totalInterest = totalPayment - totalMortgage;

// Add values to amortization table

DefaultTableModel tableModel = (DefaultTableModel) amortizationTable.getModel();

tableModel.setRowCount(0);

double balance = totalMortgage - downPayment;

for (int i = 1; i <= loanDuration * 12; i++) {

double interest = balance * monthlyInterest;

double principal = monthlyPayment - interest;

balance -= principal;

tableModel.addRow(new Object[]{i, balance, monthlyPayment, interest, principal});

}

}

}

// Main method

public static void main(String[] args) {

new MortgageCalculatorGUI();

}

}