public class MortgageCalculator4 {
  
   /*
    * - The main method.
    */
       public static void main(String args[]) {
      
      /*
       * Sets the amount of the mortgage for the calculation of the
       * loan.
       */
         double amount = 200000;
      
      /*
       * Define the matrices to store information of the loans. They
       * store the term (in years) and the interest rate of each loan.
       */
         int term[] = { 7, 15, 30 };
         double interestRate[] = { 5.35, 5.5, 5.75 };
      
      /*
       *  Print the amount of the Mortgage.
       */
         System.out.println(String
            .format("Amount of the Mortgage: %.2f", amount));
      
      /*
       * Defines a format string to print information about each
       * loan. Here we declare a variable to store the calculated monthly
       * payment. This two variables, "fmt" and "monthlyPayment" are used
       * inside the for loop.
       */
         String fmt = "\t[Loan %d] Term: %2d year(s)  Interest Rate: %6.2f%%  Monthly Payment: $%6.2f";
         double monthlyPayment;
      
      
      /*
       * The "for loop" to process the arrays.
       */
      
         for (int i = 0; i < term.length; i++) {
        
         /*
          * - Calculates the monthly payment of the loan
          */
            monthlyPayment = calculateMonthlyPayment(amount, interestRate[i],
               term[i]);
        
         /*
          * Prints the informations gathered, using the format
          * string "fmt".
          */
            System.out.println(String.format(fmt, i + 1, term[i],
               interestRate[i], monthlyPayment));
         }
      
      }
  
   /*
    *  The calculateMonthlyPayment method.
    *
    */
       public static double calculateMonthlyPayment(double amount,
           double interestRate, int term) {
          
      //
      // The formula has a principal, P, interest rate, r,
      // and number of monthly payments, m.
      //
      // The down payment is included in P.
      //
      // P ( r / 12 )
      // -------------------------
      // (1 - pow( 1 + r / 12, -m ) )
      //
      
         double p = amount;
         double r = interestRate / 100.00 / 12.00;
         int n = (term * 12);
      
         double num = p * r;
         double den = (1 - Math.pow(1 + r, -n));
      
         return den != 0 ? num / den : 0;
      
      }
   }