public class FinancialCalc {

public static void main(String[] args) {
   double principal = 1000.00; // $1000 initial investment

   double interestRate = 0.035; // 3.5% interest rate
   int numOfYears = 7; // investment length is 7 years

   double value = 0.0;
   value = principal * Math.pow((1 + interestRate), numOfYears);
   System.out.println("Investing $" + principal +
                      " at an interest rate of " + (interestRate*100) + "%" +
                      " for " + numOfYears + " years" +
                      " will have a final worth of $" + value);
   }
}