Not quite sure what I'm doing wrong.

Question

As the topic states, not quite sure what I'm doing wrong here. I'm doing a problem for a class and maybe you guys could help me out, or point me in the right direction. The question states:
"Write a program that reads in investment amount, annual interest rate, and number of years, and displays the future investment value using the following formula: "
futureInvestmentValue = investmentAmount x (1 + monthlyInterestRate)numberOfYears*12
(numberOfYears is to the power)
import javax.swing.JOptionPane;
public class Investment {
     public static void main(String[] args) {
            double investmentAmount;
            double interestRate;
            double investmentValue;
          int years;
          String stringInvestmentAmount = JOptionPane("Please Enter An Investment Amount");
               investmentAmount = Double.parseDouble( stringIvestmentAmount );
          String stringIntrestRate = JOptionPane("Please Enter An Intrest Rate In Decimal Form");
               intrestRate = Double.parseDouble( stringIntrestRate );
          String stringYears = JOptionPane("Please Enter A Number Of Years");
               years = Int.parseInteger( stringYears );
          interestRate = 1 + interestRate / 12; //Monthly interest, I believe this is how you calculate it.
          investmentValue = investmentAmount * Math.pow(interestRate, years * 12); //Now the exponent should be the number of months.
          System.out.println("Your investment value is " + investmentValue + ".");
}My Errors are:
C:\Java\Investment.java:15: cannot find symbol
symbol : method JOptionPane(java.lang.String)
location: class Investment
String stringInvestmentAmount = JOptionPane("Please Enter An Investment Amount");
^
C:\Java\Investment.java:16: cannot find symbol
symbol : variable stringIvestmentAmount
location: class Investment
     investmentAmount = Double.parseDouble( stringIvestmentAmount );
     ^
C:\Java\Investment.java:18: cannot find symbol
symbol : method JOptionPane(java.lang.String)
location: class Investment
String stringIntrestRate = JOptionPane("Please Enter An Intrest Rate In Decimal Form");
^
C:\Java\Investment.java:19: cannot find symbol
symbol : variable intrestRate
location: class Investment
     intrestRate = Double.parseDouble( stringIntrestRate );
     ^
C:\Java\Investment.java:21: cannot find symbol
symbol : method JOptionPane(java.lang.String)
location: class Investment
String stringYears = JOptionPane("Please Enter A Number Of Years");
^
C:\Java\Investment.java:22: cannot find symbol
symbol : variable Int
location: class Investment
     years = Int.parseInteger( stringYears );
     ^
6 errors
Tool completed with exit code 1
Edited by: Close on Oct 23, 2007 4:12 PM

Answer 1

String stringInvestmentAmount = JOptionPane("Please Enter An Investment Amount");What is this line trying to do? If you are trying to create a JOptionPane object and pass that String to the constructor then you need the new keyword. If you are trying to call a method of the JOptionPane class then it would be a good idea to include the method name. I sure you are trrying to do the second option.
Once you fix that, it is likely the other errors will disappear. Or different ones will emerge.