import java.io.*;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.text.*;
import java.util.*;
import java.awt.print.*;
import java.awt.Color.*;  //during research I found that this allows for colors to be used as in my color change of the save button
import javax.swing.border.*; //I was attempting to add color borders around the buttons, not added in version 12

public class Mortgage extends JApplet {
    private String[] terms={"7","15","30"};                                                                   //3 predetermined loans for a 7, 15 and 30 year loan
    private double[] rates={0.0535,0.055,0.0575};                                                    // the interest rate for the 7, 15, and 30 year loan.
    private JLabel amountLabel=new JLabel("Input The Amount of Loan, no commas");          //the text showing the user what area to input the amount of loan
    private JTextField amount=new JTextField();                                                      //this is the area to actually input the loan amount
    private JLabel termLabel=new JLabel("Enter Years of Loan to Pay On, or use the dropdown: ");      //this is the Text shouwing user to input years of loan one wished to obtain
                  private JTextField term=new JTextField();                                                           //this is where one would input the amount of years
    private JLabel rateLabel=new JLabel("Select / Input Your Interest rate, eg .055 for 5.5%: ");       //this is the text showing the user to input or select interest rate
    private JTextField rate=new JTextField();                                                            //this is the actual area to input the interest rate one wishes to have
    private JComboBox termList = new JComboBox(terms);                                  //combo box of 3 each pre=determined terms of loans, 7, 15, and 30 year
    private JLabel payLabel=new JLabel("Your Monthly Payment Will Be: ");        //this is the text showing a user that this area will be for the monthly payment.
    private JLabel payment=new JLabel();                                                                //this is the area that will show the user what the payment will be.
    private JButton calculate=new JButton("Calculate");                                          //this button will start the calculations of the items that have been inputted
    private JButton clear=new JButton("Clear");                                                       //this button will clear the areas for one to start a new calculation
    private JButton exit=new JButton("Exit");                                                            //this button will exit the item
    private JButton save=new JButton("Save");                                                       // added save button 23 June 08, inop at this time
    private JButton print=new JButton("Print");                                                         //added print button 23 June 08, inop at this time
    private JMenu loan=new JMenu("Loans");
    private JTextArea paymentSchedule=new JTextArea();                                   //this is the frame to show the payment schedule information to the user
    private JScrollPane schedulePane=new JScrollPane(paymentSchedule);     //payment schedule frame, the area to show the payment information
    private Container cp = getContentPane();
    // the menu bar
    private MenuBar mb = new MenuBar();
    // the loans menu will show the preset loans to pick from
    private Menu mLoans = new Menu("Loans");
    private MenuItem mLoan1 = new MenuItem("7 year");
    private MenuItem mLoan2 = new MenuItem("15 year");
    private MenuItem mLoan3 = new MenuItem("30 year");

    setMenuBar(mb);

// add the menus
mb.add(mLoans);
mLoans.add(mLoan1);
//mLoans.addActionListener(this);
mLoans.add(mLoan2);
//mLoans.addActionListener(this);
mLoans.add(mLoan3);
//mLoans.addActionListener(this);

//mb.add(mExit);
//mExit.add(mExit);
//mExit.addActionListener(this);

        public void init() {
                                                                                                                     // Term list
        termList.setSelectedIndex(0);
        termList.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JComboBox cb = (JComboBox)e.getSource();
                                                                                          // combo box, source drop down box for pre determined 7, 15, and 30 year loan
                String termYear = (String)cb.getSelectedItem();
                term.setText(termYear);
                int index=0;
                switch (Integer.parseInt(termYear)) {
                    case 7: index=0; break;
                    case 15: index=1; break;
                    case 30: index=2; break;
                }
                rate.setText(rates[index]+"");
            }
        });

                                                                                                                                                                            // The Buttons
        calculate.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                try {
                                                                                                                                    // calculate the payment to be paid monthly
                    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");                //my beloved decimal format that gave me issues
                    payment.setText(df.format(monthlyPayment));
                                                                                                                                    // calculate the details of the loan, principal, interest, balance, etc.
                    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());
                } catch(Exception ex) {
                    System.out.println(ex);
                }
            }
        });
        clear.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                amount.setText("");
                payment.setText("");
                paymentSchedule.setText("");
            }
        });
        exit.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                System.exit(1);
            }
        });
//my print function    print.addActionListener(new ActionListener() {
//is not working        public void actionPerformed(ActionEvent e) {
//commented out            printPrint();
//            }
//        });

        JPanel upScreen=new JPanel();                                            //setting up the frame, or pane to display to the user
        upScreen.setLayout(new GridLayout(5,2));
        upScreen.add(amountLabel); upScreen.add(amount);
        upScreen.add(termLabel); upScreen.add(term);
        upScreen.add(new Label()); upScreen.add(termList);
        upScreen.add(rateLabel); upScreen.add(rate);                                      
        upScreen.add(payLabel); upScreen.add(payment);
        JPanel buttons=new JPanel();                                                               //button for a new panel
        buttons.setLayout(new BoxLayout(buttons, BoxLayout.X_AXIS));    //laying out the box areas
        buttons.add(calculate); buttons.add(clear); buttons.add(print); buttons.add(save); buttons.add(exit); // the placement of the buttons and the order of appearance, including the new buttons save and print that are inop as of 24 June 08
        save.setBackground (new Color (255, 255, 255));                       //changed the save button background color to white-  24 June 08
        save.setForeground (new Color (255, 0, 0));                                //changed the save buuton text to red-24 June 08
//some examples of colors I found in research
//white is 255, 255, 255
//black is 0, 0, 0
//grey is 128, 128, 128
//red is 255, 0, 0        
        JPanel up=new JPanel();
        up.setLayout(new BoxLayout(up, BoxLayout.Y_AXIS));           //laying out the box areas
        up.add(upScreen); up.add(buttons);
        cp.add(BorderLayout.NORTH, up);                                           //informing where to place the borders shown inside the frame
        cp.add(BorderLayout.CENTER, schedulePane);                    //showing another border, in the pane or frame of where the payment schedule will be shown.
    }
    public static void main(String[] args) {
        JApplet applet = new Mortgage();
        JFrame frame = new JFrame("Mortgage Calculator");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setResizable(true);                                                       //if I set this to false the user cannot resize the window (or popup) to fit their needs
        frame.getContentPane().add(applet);
        frame.setSize(700,500);                                                         //the full total size of a preset frame  or popup window that the user will be using if the user does not resize it.
        applet.init();
        applet.start();
        frame.setVisible(true);
    }
}

import java.util.Set;
import java.util.HashSet;

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;

import java.text.*;

/**
* InputVerificationDemo.java is a 1.4 example that
* requires no other files.
*
* Yet another mortgage calculator.
* However, instead of using a formatted text field,
* as shown in FormattedTextFieldDemo, this example
* uses input verification to validate user input.
*/
public class InputVerificationDemo extends JPanel {
    //Default values
    private static double DEFAULT_AMOUNT = 100000;
    private static double DEFAULT_RATE = 7.5; //7.5%
    private static int DEFAULT_PERIOD = 30;

    //Labels to identify the text fields
    private JLabel amountLabel;
    private JLabel rateLabel;
    private JLabel numPeriodsLabel;
    private JLabel paymentLabel;

    //Strings for the labels
    private static String amountString = "Loan Amount (10,000-10,000,000): ";
    private static String rateString = "APR (>= 0%): ";
    private static String numPeriodsString = "Years (1-40): ";
    private static String paymentString = "Monthly Payment: ";

    //Text fields for data entry
    private JTextField amountField;
    private JTextField rateField;
    private JTextField numPeriodsField;
    private JTextField paymentField;

    //Formats to format and parse numbers
    private NumberFormat moneyFormat;
    private NumberFormat percentFormat;
    private DecimalFormat decimalFormat;
    private DecimalFormat paymentFormat;
    private MyVerifier verifier = new MyVerifier();

    public InputVerificationDemo() {
        super(new BorderLayout());
        setUpFormats();
        double payment = computePayment(DEFAULT_AMOUNT,
                                        DEFAULT_RATE,
                                        DEFAULT_PERIOD);

        //Create the labels.
        amountLabel = new JLabel(amountString);
        rateLabel = new JLabel(rateString);
        numPeriodsLabel = new JLabel(numPeriodsString);
        paymentLabel = new JLabel(paymentString);

        //Create the text fields and set them up.
        amountField = new JTextField(moneyFormat.format(DEFAULT_AMOUNT), 10);
        amountField.setInputVerifier(verifier);

        rateField = new JTextField(percentFormat.format(DEFAULT_RATE), 10);
        rateField.setInputVerifier(verifier);

        numPeriodsField = new JTextField(decimalFormat.format(DEFAULT_PERIOD), 10);
        numPeriodsField.setInputVerifier(verifier);

        paymentField = new JTextField(paymentFormat.format(payment), 10);
        paymentField.setInputVerifier(verifier);
        paymentField.setEditable(false);
        //Remove this component from the focus cycle.
        paymentField.setFocusable(false);
        paymentField.setForeground(Color.red);

        //Register an action listener to handle Return.
        amountField.addActionListener(verifier);
        rateField.addActionListener(verifier);
        numPeriodsField.addActionListener(verifier);

        //Tell accessibility tools about label/textfield pairs.
        amountLabel.setLabelFor(amountField);
        rateLabel.setLabelFor(rateField);
        numPeriodsLabel.setLabelFor(numPeriodsField);
        paymentLabel.setLabelFor(paymentField);

        //Lay out the labels in a panel.
       &nbs

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;


public class Applet extends JApplet implements ActionListener {
    
    public void init() {
        JButton b = new JButton("Go");
        b.addActionListener(this);
        getContentPane().add(b);
    }
    
    public void actionPerformed(ActionEvent e) {
        JFrame f = new JFrame("Other Windows");
        f.setBounds(60, 40, 200, 300);
        f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        f.setVisible(true);
    }

}

import java.io.*;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.text.*;
import java.util.*;
import java.awt.print.*;    //attempting to ad a print function, inop as of 24 June 2008 Mortgage16test
import java.awt.Color.*;  //during research I found that this allows for colors to be used as in my color change of a button
// found another way for colors so the next line is commented out
//import javax.swing.border.*; //I was attempting to add color borders around the buttons, not added in version 12

public class Mortgage20test extends JApplet {
    private String[] terms={"7","15","30"};                                                                   //3 predetermined loans for a 7, 15 and 30 year loan
    private double[] rates={0.0535,0.055,0.0575};                                                    // the interest rate for the 7, 15, and 30 year loan.
    private JLabel amountLabel=new JLabel("Input The Amount of Loan, no commas");          //the text showing the user what area to input the amount of loan
    private JTextField amount=new JTextField();                                                      //this is the area to actually input the loan amount
    private JLabel termLabel=new JLabel("Enter Years of Loan to Pay On, or use the dropdown: ");      //this is the Text shouwing user to input years of loan one wished to obtain
                private JTextField term=new JTextField();                                                           //this is where one would input the amount of years
    private JLabel rateLabel=new JLabel("Select / Input Your Interest rate, eg .055 for 5.5%: ");       //this is the text showing the user to input or select interest rate
    private JTextField rate=new JTextField();                                                            //this is the actual area to input the interest rate one wishes to have
    private JComboBox termList = new JComboBox(terms);                                  //combo box of 3 each pre=determined terms of loans, 7, 15, and 30 year
    private JLabel payLabel=new JLabel("Your Monthly Payment Will Be: ");        //this is the text showing a user that this area will be for the monthly payment.
    private JLabel payment=new JLabel();                                                                //this is the area that will show the user what the payment will be.
    private JButton seven=new JButton("7 years @ 5.35%");
    private JButton fifteen=new JButton("15 years @ 5.55%");
    private JButton thirty=new JButton("30 years @ 5.75%");    
    private JButton calculate=new JButton("Calculate");                                          //this button will start the calculations of the items that have been inputted
    private JButton clear=new JButton("Clear");                                                       //this button will clear the areas for one to start a new calculation
    private JButton exit=new JButton("Exit");                                                            //this button will exit the item
    private JButton print=new JButton("Print");                                                         //added print button 23 June 08, inop at this time
    private JTextArea paymentSchedule=new JTextArea();                                   //this is the frame to show the payment schedule information to the user
    private JScrollPane schedulePane=new JScrollPane(paymentSchedule);     //payment schedule frame, the area to show the payment information
    private Container cp = getContentPane();


    public void init() {
                                                                                                                     // Term list
        termList.setSelectedIndex(0);
        termList.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JComboBox cb = (JComboBox)e.getSource();
                                                                                          // combo box, source drop down box for pre determined 7, 15, and 30 year loan
                String termYear = (String)cb.getSelectedItem();
                term.setText(termYear);
                int index=0;
                switch (Integer.parseInt(termYear)) {
                    case 7: index=0; break;
                    case 15: index=1; break;
                    case 30: index=2; break;
                }
                rate.setText(rates[index]+"");
            }
        });

                                                                                                                                                                            // The Buttons
    &nb