Incompatible data types in combination

Question

Hi All,
i am getting this error incompatible data types in combination when i run my interface. my interface extract data from table and loads into file.it was running fine but dun know why its giving this error now during insert rows step.

Answer 1

You're essentially trying assign a void value to a double... that's what the error is telling you.
public static void showKilometers(double m)
double kilos;
kilos = m * 0.001;
JOptionPane.showMessageDialog(null,(m) + " Meters is " +
(kilos) + " Kilometers.");
} The reason this doesn't work is because in order to assign the value of a function to a variable, the function must actually return a value.
Try this:
public static double showKilometers(double m)
double kilos;
kilos = m * 0.001;
JOptionPane.showMessageDialog(null,(m) + " Meters is " +
(kilos) + " Kilometers.");
return kilos;
} Do the same thing for your other conversions and make sure the function and return types are correct.
Edit: Ah, looking back over the program, you weren't actually trying to assign variables; rather, you were just wanting to display them. My bad, I only looked at the narrow scope of the error and wondered why you wanted message dialogs. =)
But, hopefully my description of that error will help you understand a few things.
Edited by: Thok on Oct 10, 2007 2:40 PM