The line degrees = JOptionPane.showInputDialog("Enter C to convert
Celsius or F Fahrenheit.");
is wrong. JOptionPane.showInputDialog returns a String, not a char.
Change the type of degrees to String.
If there are any other errors, please say on which line, that makes it
easier for other people to see wat's wrong.
--
Mark Van Peteghem
http://www.q-mentum.com -- easier and more powerful unit testing
njdude20 wrote:
>
> I am very new to Java programming and I am taking courses online
> through the University of Maryland. I need help figuring out how to
> fix the problem in one of the programs I am writing. I am entering
> the program in JCreator and when I go to compile the program I get
> an error message of incompatiable types. How do I fix this? Here is
> the file:
> /**
> This program is written to convert temperatures from
> and also Celsius to Fahrenheit or from Fahrenheit to Celsius and
> to print a range of temperatures that you want.
> */
> import javax.swing.*;
>
> public class TempConv
> {
> public static void main(String[] args)
> {
> String temp;
> int startTemp, endTemp, tempC, tempF, temp2;
> double temp1, degreesC, degreesF;
> char degrees;
>
> temp = JOptionPane.showInputDialog(
> "Enter any temperature (either Celsius or
> Farhenheit that you would like to convert");
> temp1 = Double.parseDouble(temp);
>
> degrees = JOptionPane.showInputDialog(
> "Enter C to convert Celsius or F
> Fahrenheit.");
>
> if ( (degrees == 'c') || (degrees == 'C') )
> {
> degreesF = temp1;
> degreesC = 5 * (degreesF - 32) /9;
> JOptionPane.showMessageDialog(null,
> degreesF + " Fahrenheit = "
> + degreesC + " Celsius");
> }
> else if ( (degrees == 'f') ||
> (degrees == 'F') )
> {
> degreesC = temp1;
> degreesF = ( 9 *
> (degreesC) / 5 ) + 32;
> JOptionPane.showMessageDialog
> (null,
> degreesC + " Celsius
> = " + degreesF + " Fahrenheit.");
> }
>
> else
> {
> degrees =
> JOptionPane.showInputDialog(
> "Enter either C to
> convert to Celsius or F to convert to Fahrenheit");
> }
>
> startTemp = JOptionPane.showInputDialog(
> "Enter a whole number starting
> tempterature.");
>
> endTemp = JOptionPane.showInputDialog(
> "Enter a whole number ending temperature
> higher than the starting temperature.");
>
> degrees = JOptionPane.showInputDialog(
> "To convert to Celsius enter C and to
> convert to Fahrenheit enter F");
> temp2 = startTemp;
>
> if ( ( (temp2 <= endTemp) && ( (degrees == 'c') ||
> (degrees == 'C') ) ) )
> {
> tempC = 5 * ( temp2 - 32 ) / 9;
> JOptionPane.showMessageDialog(null,
> temp2 + " F = " + tempC + " C \n");
> temp2++;
> }
> else if ( ( (temp2 <= endTemp) && ( (degrees == 'f')
> || (degrees == 'F') ) ) )
> {
> tempF = ( 9 * (temp2) / 5) + 32;
> JOptionPane.showMessageDialog(null,
> temp2 + " C = " + tempF + " F \n");
> temp2++;
> }
> else if (temp2 > endTemp)
> {
> temp2 = temp2 - endTemp;
> startTemp = JOptionPane.showInputDialog(
> "Your starting temperature is: " +
> temp2 + "above your ending temperature. \n" +
> "Please choose another number lower
> than: " + endTemp);
> }
> else
> {
> degrees = JOptionPane.showInputDialog(
> "Please enter either C to convert to Celsius
> or F to convert to Fahrenheit.");
> }
>
> }
> }
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