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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