BigDecimal Class Java
<p>I'm trying to write a program for school using the BigDecimal class. The program is an interest rate calculator and and the final output should be somethig like:</p>

<pre><code>    Loan Amount: whatever loan amount is in dollars
    Interest Rate: as a percent
    Interest: amount of interest paid in dollars
    continue? Y/N: 
</code></pre>

<p>The book isn't clear on how to code the BigDecimal class and I'm using Eclipse so any time I make a change I get an error which is confusing. 
Could someone look this over and set me in the right direction? I'm using Murach's Java SE6 and the book just isn't very helpful. </p>

<p>Thank you!</p>

<pre><code>    import java.util.Scanner;           //import scanner
    import java.text.NumberFormat;      //import number format
    import java.math.*;                 //import math classes


    public class InterestCalculator     //create public class
    {

        public static void main(String[] args) 
            {
            Scanner calc = new Scanner(System.in);  //create scanner
            double LoanAmount, InterestRate, Interest; //declareLoanAmount,InterestRate, and Interest as double

            //welcome user to the Interest Rate Calculator
            System.out.println("Welcome to The Interest Rate Calculator");
            System.out.println();
            //perform choice calculations until choice isn't equal to "y" or "Y"
            String choice = "y";    
            while (choice.equalsIgnoreCase("y"))
                {

                //Get Loan Amount from user
                System.out.println("Enter Loan Amount: ");
                LoanAmount = calc.nextDouble();

                //Get Interest rate from user
                System.out.println("Enter Interest Rate: ");
                InterestRate = calc.nextDouble();

                BigDecimal decimalInterest = new BigDecimal(Double.toString(Interest));
                decimalInterest = decimalInterest.setScale(2, RoundingMode.HALF_UP);
                BigDecimal decimalInterestRate = new BigDecimal(Double.toString(InterestRate));
                decimalInterestRate = decimalInterestRate.setScale(2, RoundingMode.HALF_UP);

                //calculate interest



                System.out.println("message");


                //prompt user to continue?
                System.out.println("Continue? Y/N: ");
                choice = calc.next();
                System.out.println();



                }


        }

    }
</code></pre>
