I'm making an application that converts units. I cant not for the life of me figure out why this isnt working. The answer returned is 0.0 when I convert from Fahrenheit to Kelvin or vice versa. The K to C conversions work though.
Any insight would be amazing.
This is the Conversion.java class that is called by my ConversionTest.java.
//Temperature is represented with integer values as follows:
// KELVIN (2)
// CELSIUS (1)
// FAHRENHEIT (0)
//############################################################
// The integer "init" indicates what the initial temperature measurement
// is and "conv" indicates what to convert to.
public class Conversion {
public static double TempConvert(double initial, int init, int conv) {
switch (init){
case 2:
switch (conv){
case 2: return initial;
case 1: return KtoC(initial);
case 0: return KtoF(initial);
default: return -1;
}
case 1:
switch (conv){
case 2: return CtoK(initial);
case 1: return initial;
case 0: return CtoF(initial);
default: return -1;
}
case 0:
switch (conv){
case 2: return FtoK(initial);
case 1: return FtoC(initial);
case 0: return initial;
default: return -1;
}
default: return -1;
}
}
private static double FtoK(double FarValue){
return ((FarValue +459.67)*(5/9));}
private static double FtoC(double FarValue){
return ((FarValue-32)*(5/9));}
private static double CtoF(double CelValue){
return ((CelValue*(9/5)+32));}
private static double CtoK(double CelValue){
return (CelValue+273.15);}
private static double KtoC(double KelValue){
return (KelValue-273.15);}
private static double KtoF(double KelValue){
return ((KelValue*(5/9))-459.67);}This the ConversionTest.java code that accesses this class. I get 0.0 as my converted unit every time.
//ConversionTest.java
//testing the class Conversion
import java.util.Scanner;
public class ConversionTest {
public static void main(String args[]) {
Scanner input = new Scanner (System.in);
double initialTemp;
int typeFrom;
int typeTo;
double answer;
System.out.printf("%s", "Enter temperature to convert: ");
initialTemp = input.nextDouble();
System.out.println();
System.out.printf("%s\n%s\n%s\n%s","(0) FAHRENHEIT", "(1) CELSIUS", "(2) KELVIN",
"What type of temp is it: ");
typeFrom = input.nextInt();
System.out.println();
System.out.printf("%s\n%s\n%s\n%s","(0) FAHRENHEIT", "(1) CELSIUS", "(2) KELVIN",
"What type of temp is it: ");
typeTo = input.nextInt();
System.out.println();
answer = Conversion.TempConvert(initialTemp, typeFrom, typeTo);
System.out.printf("%.02f", answer);
}
}