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Help with Mortgage calculator program

Discussion in 'Java' started by harryt123, Jun 15, 2006.

  1. harryt123

    harryt123 New Member

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    I designed a Java mortgage program and it is working fine but I need to add some more things to it. I want to make the program list the loan balance and the interest paid for each payment over the term of the 30 year loan.(I want it to list for every 1 yr and then every couple of years). I want this list to scroll off the screen or even do a loop to show the partial list, hesitate and then display more of the list. I want to do this program with no GUI(graphical user interface). I will post my program coding below and any help would be appreciated greatly.

    Code:
    public class MortgageProgram {
        
        public static void main (String[] args){
            double payment, principal = 200000; //*Principle amount of loan is $200,000
            double annualInterest = 0.0575; //*Interest rate is currently 5.75%
            int years = 30; //*Term of the loan is 30 years
            
            if (args.length == 3) {
               
                  principal = Double.parseDouble(args[0]);
                  annualInterest = Double.parseDouble(args[1]);
                  years = Integer.parseInt(args[2]);
             
               }
               print(principal, annualInterest, years);
            
             
                System.out.println("Usage: Calculate Mortgage Payment Amount ");
                System.out.println("\nFor example: $200,000 Mortgage loan amount, 5.75% interest for a 30 year term "); //*States that Loan Amount is $200,000, interest is 5.75% and it is 30 year term. 
                System.out.println("\nThe Following is your output based on the hardcoded amount: \n"); //*Will show output in the following format
    	    print(principal, annualInterest, years);
                System.exit(0); //*System exits nice and quietly
            }    
        public static double calculatePayment(double principal, double annRate, int years){
            double monthlyInt = annRate / 12;
            double monthlyPayment = (principal * monthlyInt)
                        / (1 - Math.pow(1/ (1 + monthlyInt), years * 12)); //*Shows 1 monthly payment multiplied by 12 to make one complete year. 
            return format(monthlyPayment, 2);
        }
        public static double format(double amount, int mortgage) {
            double temp = amount; 
            temp = temp * Math.pow(10, mortgage);
            temp = Math.round(temp);
            temp = temp/Math.pow(10, mortgage);
            return temp;
        }
        public static void print(double pr, double annRate, int years){
            double mpayment = calculatePayment(pr, annRate, years);
            System.out.println("The principal is $" + (int)pr); //*Shows the principle amount in $ value. 
            System.out.println("The annual interest rate is " + format(annRate * 100, 2) +"%");
            System.out.println("The term is " + years + " years"); //*Term is normally in years.
            System.out.println("Your monthly payment is $" + mpayment); //*Shows output of monthly payment. 
          
        }
    }
    
     
  2. rheamae05

    rheamae05 New Member

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    The code script is good! What site are you working with?
     
  3. Mviner

    Mviner Banned

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    Do you have any website where you uploaded this to see how it works ?
     

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