Hello, everyone. I need help on my JAVA project. I was able to write my code, but I do not get the output that I desire. I also need to validate user input. For example, all dollar amounts are >=0. Down Payment has to be atleast 10% of total cost or 1000, whichever is less. Interest rate is between 0-25% and length of loan is 1-48 months. Thanks in advance
This is the output that I am supposed to get is in the attachment

This is my code:

import java.text.DecimalFormat;
	import java.util.Scanner;

	public class testproj2
	{
	    public static void main(String[] args)
	    {
	        

	       

      
      double autoPrice;          //Price of Automobile
      double extWarr;            //Price of Extended Warranty
      double salesTax;           //Sales Tax
      int lenLoan;               //Length of Loan
      double monPay;             //Monthly Pay
      double totCost;           //Total Cost
      double downPay;           //Down Payment
      double amtFin;            //Amount Financed
      double intRate;          //Interest Rate
      
      final double taxPercent = 0.0625; //Sales Tax Percent
      double rateDec;               //Interest Rate as Decimal
      double monRate;               //Monthy Interest Rate

       // Create a Scanner object to read input.
      Scanner keyboard = new Scanner(System.in);
      //Create a DecimalFormat object
       DecimalFormat formatter = new DecimalFormat("0.00");

	 String correctInputCheck = "";
	 
	 char correctInputCheckChar; // Used to create the condition for the following do-while loop
	        // Checks if the user is satisfied with the input and proceeds if so. Mistakes can be corrected
	        // if the user is not satisfied with the input. All amounts will be re-read by this loop.
	        do
	        {
	            //Input Price of Automobile
       System.out.print("What is the price of your automobile?");
       autoPrice = keyboard.nextDouble();
       if (autoPrice <0)
       {
           System.out.print("Invalid Input. Price of Car must be greater than 0");}
 else
       {//Prompt for Extended Warranty
        System.out.print("Please, type the cost of the extended Warranty. Or, press 0 if not purchased.");
       extWarr = keyboard.nextDouble();
       if (extWarr <0)
           {
               System.out.print("Invalid Input. Price of Extended Warranty must be 0 or Higher");
           }
 else{
        //Calculate Sales Tax
       salesTax = taxPercent * autoPrice;

       //Calculate Total Cost
       totCost = autoPrice + extWarr + salesTax;

       //Input Down Payment
       System.out.print("How much is the down payment?");
       downPay = keyboard.nextDouble() ;


        //Input interest rate
        System.out.print("Annual Interest Rate: ");
       intRate = keyboard.nextDouble() ;
       if (intRate < 0 && intRate > 25)
       {System.out.print("Invalid Input. Interest Rate has to between 0-25");
    }
 else {

     //Length of Loan input
       System.out.print("Length of Loan (in months): ");
        lenLoan = keyboard.nextInt();
        if (lenLoan < 1 && intRate > 48)
         { System.out.print("Invalid Input. Length of Loan has to be between 1-48");
    }
 else {

        //Calculate Sales Tax
       salesTax = taxPercent * autoPrice;

       //Calculate Total Cost
       totCost = autoPrice + extWarr + salesTax;

       //Calculate Amount Financed
       amtFin = totCost - downPay;

       //Calculate Monthly Pay
 if (intRate > 0)
             { rateDec = intRate/100 ;
               monRate = rateDec/12;
              monPay = (amtFin * monRate) / (1 - Math.pow(1 / (1 + monRate),
                      lenLoan));}

 else
 {monPay =(amtFin/lenLoan);}



      // Display Report
      System.out.println("              Deals on Wheels!");
      System.out.println("\nAutomobile Loan Schedule -- prepared for "
              + "Kunal Patel");

      System.out.println("\nAutomobile price:" + "            $"
              + formatter.format(autoPrice));
      System.out.println("Extended Warranty:            "
              + formatter.format(extWarr));
      System.out.println("Sales Tax:                     "
              + formatter.format(salesTax));

      System.out.println("                             ________");
      System.out.println("Total Cost" + "                   $"
              + formatter.format(totCost));
      System.out.println("Down payment:                 "
              +  formatter.format(downPay));

      System.out.println("                             ________");
      System.out.println("Amt. Financed:" + "               $"
              + formatter.format(amtFin));


      System.out.println("\nAnnual interest rate:        "
              + formatter.format(intRate) + "%");
      System.out.println("Length of Loan:              "
              + lenLoan + " months");
      System.out.println("Monthly Payment               " + "$"
              + formatter.format(monPay));
      System.out.println("\n\nType \"y\"/\"Y\" if the input is correct. Type any other key to retype the data: ");
	            correctInputCheck = keyboard.next();
	            correctInputCheckChar = correctInputCheck.charAt(0);
 } while()(!(correctInputCheckChar == 'y' || correctInputCheckChar == 'Y'));

	       

	        
	        
	        double monthlyInterestAmount = monRate * amtFin;
	        double monthlyBalance = amtFin + monthlyInterestAmount - monPay;

	        double yearlyInterest = 0;

	        int m = 0;  // # of months counter for table generation
        int n = 0;  // # of months counter for number of years to generate tables for
	        

	        for (n = 12; n <= lenLoan; n += 12)
	        {
	            if (n % 12 == 0)
	            {
	                System.out.println("\n\nAmortization Schedule for Year " + n/12 + " :\n" +
	                        "Month" + "\t" + "Interest" + "\t" + "Payment" + "\t\t" + "Balance");
	                for (m = 1; m <= 12; m++)
	                {
	                    System.out.println(m +
	                            "\t" + formatter.format(monthlyInterestAmount) +
	                            "\t\t" + formatter.format(monPay) +
	                            "\t\t" + formatter.format(monthlyBalance));
	                    yearlyInterest += monthlyInterestAmount;
	                    monthlyInterestAmount = monthlyBalance * monthlyInterestRate;
	                    monthlyBalance = monthlyBalance + monthlyInterestAmount - monPay;

	                    if (m == 12)
	                    {
	                        
	                        System.out.println("Pmt   : " + formatter.format(m * monPay));
	                        System.out.println("Interest: " + formatter.format(yearlyInterest));
	                        System.out.println("Principal: " + formatter.format(m * monPay - yearlyInterest));
                                System.out.println("Monthly Payment: " + formatter.format(m * monPay - yearlyInterest));
	                        System.out.println("Balance: " + formatter.format(amtFin - (m * monPay - yearlyInterest)));
	                        System.out.println("\n***************************************************");
	                    }
	                }
	            }
	        }
	    }
	}



}

Edited 5 Years Ago by kxpatel29: n/a

what is it you are having trouble with...any particular line of code?

Please clarify.

I have no error, or at least Netbeans is not telling me any problem. When I run it, nothing comes up in output

You must be getting an error.

while()(!(correctInputCheckChar == 'y' || correctInputCheckChar == 'Y'));

Is not valid.

This article has been dead for over six months. Start a new discussion instead.