Re: cannot be applied to (double,java.lang.String)

Question

It's telling you what the problem is -- you're trying to pass a String in where a double is required. Java is a strongly typed language, which means that you can't expect types to change automatically into other types as needed.
You could, I suppose, parse the string, assuming that it holds a representation of a double. But if you look at the method in question, you'll see that it doesn't even use its second (double) argument.
So you should ask yourself:
1) should that method really take two arguments?
2) what is the second argument for, if I did use it?
3) what is the best type to represent the second argument?
(hint: with a name like "customerType", then an enum seems likely)
[add]
Too slow again.
Though I'll also add: please wrap any code you post in [code][/code] tags. It makes your code much easier to read.
Message was edited by:
paulcw

Answer 1

>  String n ;
n = JOptionPane.showInputDialog(null, "Enter Month No.:");
pow(double,double) in java.lang.Math cannot be
applied to (double,java.lang.String)Read the error diagnostic carefully: the compiler found a pow() method
in the Math class, but it takes two doubles as its arguments. You,
however, supplied a double and a String as the parameter types.
The method found by the compiler cannot be applied to your parameters.
hint: you have to convert that String to a double,
kind regards,
Jos