import java.text.DecimalFormat;

public class mortgage1
{
    public static void main (String[] args)
    {
        //Declare and construct variables
        DecimalFormat decimalPlaces = new DecimalFormat(".00");
        double    monthlypayments, principle,interest,
                interestAmount, payment;

        int    amount, i, paymentsPerPage, lengthOfPause;


        /* Below is the hard coded values used in the formula
           for calculating the monthly mortgage payment amount
        */
        interest = 0.0575;       //Interest rate
        principle = 200000;      //Amount borrowed
        monthlypayments = 360;   //Number of monthly payments

        //This is the formula used to calculate the monthly payment
        payment = principle * ( (interest / 12.0) / (1 - Math.pow( (1 + (interest / 12.0)),-monthlypayments) ));

        //Output to screen
            System.out.println("Principle = $"+decimalPlaces.format(principle));               //The original amount borrowed
            System.out.println("Interest Rate ="+interest*100 +"%");                           //The interest rate
            System.out.println("Monthly Payments = $"+decimalPlaces.format(monthlypayments));  //The number of payments
            System.out.print("Payment per Month = $");                                         //The monthly payment amount
            System.out.println(decimalPlaces.format(payment));                                 //formats the payment amount to two decimals
            System.out.println("**************************");
            System.out.println("**************************");



        lengthOfPause = 5; //The amount of time (in seconds) to pause the page
        paymentsPerPage = 20; //The number of payments to view per page
        i = 1;



        for(i = 1; i <= 360; i++)
        {
            System.out.println("Payment " + i + ":");
            System.out.println("----------");

            System.out.println("Payment Amount:   $ " + decimalPlaces.format(payment));
            interestAmount = ((interest / 12) * principle);
            System.out.println("Interest Amount:   $ " + decimalPlaces.format(interestAmount));

            // You also have to calculate interest and add that back in.
            principle = (principle - payment) + interestAmount;
            System.out.println("Remaining Balance: $ " + decimalPlaces.format(principle));
            System.out.println("----------");
            System.out.println("");
            if(((i - 1) % paymentsPerPage) == 0)
            {
                try{Thread.sleep(lengthOfPause * 1000);}  //This is a pause function.
                catch(InterruptedException ie){}
            }
        }
    }
}