Simple class problem

[kev]

I am having trouple with this simple class:

/** test
* @KPB
*/

public class testofclass
{
static final double RATE = 0.05;
static double purchase;

public static void main(String[] args)
{
double tax;
double total;
purchase=Double.parseDouble(args[0]);
tax = RATE * purchase;
total = purchase + tax;
System.out.println("Total: " + total);
}
}


****
When I compile(which works fine) and run this application, I get this error:

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at testofclass.main(testofclass.java:14)


Can anyone provide a quick fix?

[emann]

args[0] = your program name

try
purchase=Double.parseDouble(args[1]);

[Henrik S. Larsen]

Not in java

args[0] is the first argument / parameter to the class.
Seems to me, that you are running the class without any arguments

[Ted Herman]

Yes, I don't think you can define static constants in a class with the main method...