Java Help

So I have to make this investment calculator which is posted down below me. After I compile and run it. The file seems trk perfectly fine except for one error. If I told it 100 for Initial Investment and then 500 for Investment goal. It says it would take 499 years. What did I do wrong?

/**

 * @(#)Investment 2.java

 *

 *

 * @author 

 * @version 1.00 2011/1/16

 */





import java.util.*;



public class Investment2 {

public static void main(String[] args) {



double principal = 0;

double interest = 0;

double rate = 0.10;

int years = 0;

double goal = 0;

double total = 0;

int userinput = -1;



Scanner myScanner = new Scanner(System.in);



// Welcome message

System.out.println("Welcome to the Investment Calculator Beta");





// Enter initial amount

System.out.println ("Enter  initial investment amount. If you want to exit enter 0.");

int input1 = myScanner.nextInt();

principal = input1;



// Decision for exit

if (input1 == 0){

System.exit(0);

}



// Enter goal amount

System.out.println ("Enter your goal investment amount: ");

int input2 = myScanner.nextInt ();

goal = input2;



System.out.println ("The fixed interest rate is 10%"); //Change if you have different rate



 // Loop to get total years

 total= principal;

 total= (interest+1)*total;

    for (total = 0; total < goal; total++){

       System.out.println("To reach your $" + goal + "0 goal it will take " + years + " years.");

       years++;



 // Continue play

   if (total == goal){

      System.out.println("Would you like to enter another amount?");

         int input3 = myScanner.nextInt ();



      } while (userinput == 1);

    }

  }



}

Just from skimming over it:

// Loop to get total years

total= principal;

total= (interest+1)*total;

for (total = 0; total < goal; total++){

System.out.println("To reach your $" + goal + "0 goal it will take " + years + " years.");

years++;

You're assigning some value to "total" and then in the for loop you're replacing that value with 0. Maybe that's what's wrong?

^ somewhat of what he just said. Asking for user input is easy. The algorithm is the tricky part. Clean up your un-needed variables. Your loop basically does nothing but count.

/**

 * @(#)Investment 2.java

 *

 *

 * @author 

 * @version 1.00 2011/1/16

 */





import java.util.*;



public class Investment2 {

public static void main(String[] args) {



double principle = 0;

double goal = 0;

double total = 0;

int userinput = -1;



Scanner myScanner = new Scanner(System.in);



// Welcome message

System.out.println("Welcome to the Investment Calculator Beta");





// Enter initial amount

System.out.println ("Enter  initial investment amount. If you want to exit enter 0.");

principle = myScanner.nextInt();





// Decision for exit

if (principle == 0){

System.exit(0);

}



// Enter goal amount

System.out.println ("Enter your goal investment amount: ");

goal = myScanner.nextInt ();





//System.out.println ("The fixed interest rate is 10%"); //Change if you have different rate



 // Loop to get total years

 total = principle;

    for (int j = 0; total <= goal; j++)

    {

        total = total + total*.1;

         if(total >= goal)

            {

                System.out.println("To reach your $" + goal + "0 goal it will take " + j + " years.");

            }

    }





 // Continue play

   if (total >= goal){

      System.out.println("Would you like to enter another amount?");

         int input3 = myScanner.nextInt ();



      } while (userinput == 1);

    }

  }

I feel a little proud of myself now