Re: Exception in thread "main" java.lang.NoSuchMethodError

Hi everybody,

I'm working a program assignment for school. I thought my code was
good but it won't run. It compiles successfully but gives me this
error during runtime:

Exception in thread "main" java.lang.NoSuchMethodError

Do you have any advice? My code is below.

Thanks in advance,

Don

<-------------------------------------------------------------------------------------------------------------------------------------------------------

/*
Title: Mortgage Payment Calculator
Programmer: Don
Date: May 14, 2007
Filename: MortPayCalc.java
Purpose: This program calculates mortgage payment amounts.
*/

import java.text.DecimalFormat;
import javax.swing.JOptionPane;

class MortPayCalc2
{

private boolean end = false;
private DecimalFormat newFormat = new DecimalFormat ("$#,###.00");
private double dPrincipal, dAPR, dPayment, dCurrMonthInterest,
dCurrMonthPrincipal, dLoanBalance;
private double dLoanPrincipal = dPrincipal;
private int iTerm, iPayments, iOption;
private String Principal;
private String Table = "";

public void GetPrincipal()
{

    Principal = JOptionPane.showInputDialog(null, "Enter Loan
Principal (ex. 20000): ", "Mortgage Payment
Calculator",JOptionPane.QUESTION_MESSAGE);
    dPrincipal = Double.parseDouble(Principal);

}

public void GetLoanTerms()
{

Object[] possibilities = {"Loan A", "Loan B", "Loan C"};
String s = (String)JOptionPane.showInputDialog(null,"Please choose
your loan terms:\n",
    "Mortgage Payment
Calculator",JOptionPane.PLAIN_MESSAGE,null,possibilities,"Loan A");

int [] Terms = {7, 15, 30};
double [] Rates = {5.35, 5.5, 5.75};

if (s == "Loan A")
{
    iTerm = Terms[0];
    dAPR = Rates[0];
    }
else if (s == "Loan B")
     {
    iTerm = Terms[1];
    dAPR = Rates[1];
    }
else
     {
    iTerm = Terms[2];
    dAPR = Rates[2];
    }

}

public void CalculatePayment()
{

iPayments = iTerm * 12;
dAPR = dAPR/100/12;
dPayment = (dPrincipal*Math.pow((1+dAPR),iPayments)*dAPR)/
(Math.pow((1+dAPR),iPayments)-1);

}

public void CalculateAmortization()
{

for (int i = 0; i < iPayments; i++)
{
dCurrMonthInterest = dLoanPrincipal * dAPR;
dCurrMonthPrincipal = dPayment - dCurrMonthInterest;
dLoanBalance = dLoanPrincipal - dCurrMonthPrincipal;
dLoanPrincipal = dLoanBalance;
String Row = String.format(newFormat.format(dCurrMonthPrincipal) +
" " + newFormat.format(dCurrMonthInterest) + " " +
newFormat.format(dLoanBalance) + "\n");
Table = Table + Row;
}
}

public void DisplayResults()
{

iOption = JOptionPane.showConfirmDialog(null,
"Loan Principal: " + newFormat.format(dPrincipal) + "\n" +
     "Loan Annual Percentage Rate: " + dAPR + "%" + "\n" +
    "Loan Term In Years: " + iTerm + " years" + "\n" +
    "Monthly Loan Payment Amount: " + newFormat.format(dPayment) +
"\n" +
Table + "\n\n" +
    "Recalculate?",
       "Mortgage Payment Calculator", JOptionPane.YES_NO_OPTION);

}

public void main(String[] args)
{

while (end == false)
{

GetPrincipal();
GetLoanTerms();
CalculatePayment();
CalculateAmortization();
DisplayResults();

if (iOption == JOptionPane.YES_OPTION)
     {
      end = false;
     }
     else
     {
      System.exit(0);
     }

}

}

}