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Java Forum / First Aid / July 2006

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help with code

Thread view: 
Everett Arndt - 31 Jul 2006 09:20 GMT
The following is the error. The format is correct but I cannot find the code
problem

C:\POS407\JavaPrograms\bin>run

C:\POS407\JavaPrograms\bin>REM Change directory to the classes directory

C:\POS407\JavaPrograms\bin>cd ..\classes

C:\POS407\JavaPrograms\classes>REM Execute Java program

C:\POS407\JavaPrograms\classes>java -classpath . EverettMortgagePayment_CR4
Exception in thread "main" java.lang.NoClassDefFoundError:
EverettMortgagePaymen
t_CR4

C:\POS407\JavaPrograms\classes>REM Change directory back to the bin
directory

C:\POS407\JavaPrograms\classes>cd ..\bin

C:\POS407\JavaPrograms\bin>

package mortgage;

import java.text.*;
import java.util.*;
import java.io.*;

public class EverettMortgagePayment_CR4
{

   public static void main(String[] args) throws IOException
   {
       NumberFormat formatter =
NumberFormat.getCurrencyInstance(Locale.US);

       double mortgagePrinciple = 200000.00;
       double interestRate = .0575;
       double interest = 0;
       int termMonths = 360;
       double months = 360;
       double temp = 0;
       double monthlyPayment = 0;
       double interestPaid = 0;
       double principalPaid = 0;
       double mortgageBalance = 200000.00;

       //formula to calculate monthly payment amount
       monthlyPayment = (mortgagePrinciple * (interestRate / 12)) / (1 - 1
/
       Math.pow((1 + interestRate / 12), termMonths));

       //Prints the mortgage calculator
       System.out.println("Mortgage Calculator");
       System.out.println("Your payment for a " +
       (formatter.format(mortgagePrinciple)) +
       " mortgage over a term of");

       System.out.println((termMonths/12) +
       " years with an interest rate of " + (interestRate * 100) + "% will
be "
       + (formatter.format(monthlyPayment)) + " a month.");

       System.out.println();
       System.out.println("Press Enter to Continue.");
       System.in.read ();

       // Starts loop statement

       // declares formula for loan balance and interest paid.
       while (termMonths > 0)
       {

           // reduces the term one month at a time
           months --;

           /* calculates the interest paid and resets the mortgage
           balance to reflect payment.*/
           temp = (1 - 1 / Math.pow((1 + interestRate / 12), months));
           interestPaid = monthlyPayment * temp;
           mortgageBalance = mortgagePrinciple - monthlyPayment +
interestPaid;

           //Displays the payment amount, mortgage balance, and interest
paid.
           System.out.println("After a payment of: " +
           formatter.format(monthlyPayment));

           System.out.println("The current balance of your mortgage is: " +
           formatter.format(mortgageBalance));

           System.out.println("This months interest paid on the mortgage
is: "
           + formatter.format(interestPaid));

           System.out.println();

           //sets a new mortgage amount reflecting the payment.
mortgagePrinciple = mortgageBalance;

           //Pauses screen
           try
           {
               Thread.sleep(1500);
           }
           catch (InterruptedException e)
           {
               e.printStackTrace();
           }

       }//End of while loop

   }//End of Main

}//End of EverettMortgagePayment_CR4
cp - 31 Jul 2006 10:29 GMT
Check your classpath.
Andrew Thompson - 31 Jul 2006 11:44 GMT
..
> C:\POS407\JavaPrograms\bin>cd ..\classes
>
[quoted text clipped - 4 lines]
> EverettMortgagePaymen
> t_CR4

This command is expecting to find the class at
 classes/EverettMortgagePayment_CR4.class

.., whereas this..

> package mortgage;

..indicates the class is actually located at..

 classes/mortgage.EverettMortgagePayment_CR4.class

To fix the problem, try invoking java like this
(line wrapped for clarity)..

C:\POS407\JavaPrograms\classes>java
 -classpath .
 mortgage.EverettMortgagePayment_CR4

HTH

Andrew T.
Andrew Thompson - 31 Jul 2006 11:47 GMT
> ..indicates the class is actually located at..
>
>   classes/mortgage.EverettMortgagePayment_CR4.class

Oops!  Try..
 classes/mortgage/EverettMortgagePayment_CR4.class

Andrew T.
ge0rge - 31 Jul 2006 12:14 GMT
...
> C:\POS407\JavaPrograms\classes>java -classpath . EverettMortgagePayment_CR4
> Exception in thread "main" java.lang.NoClassDefFoundError:
> EverettMortgagePaymen
> t_CR4

...
> package mortgage;

It's to do with the package statement.
In C:\POS407\JavaPrograms\classes, create the subdirectory mortgage and
stick the EverettMortgagePayment_CR4 class in it
then cd to directory classes and issue
java -classpath . mortgage.EverettMortgagePayment_CR4

See Roedy Green's page on classpath
http://mindprod.com/jgloss/classpath.html

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