Can't figure out what's wrong.

Question

I was trying to make a temperature scale converter. But everytime i got new erorr(s). This time:
Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Unknown Source)
at java.util.Scanner.next(Unknown Source)
at java.util.Scanner.nextDouble(Unknown Source)
at ConverterAdvanced.main(ConverterAdvanced.java:8)
Pls, help. What am I doing wrong?

The code itself:

import java.util.Scanner;
public class ConverterAdvanced {
public static void main(String[] args) {
Scanner choose = new Scanner(System.in);
Scanner temp = new Scanner(System.in);
Double temper = temp.nextDouble();
System.out.println("Choose your scale: Cs Fh Kl");
System.out.println(choose.nextLine());

Double resCstoFh = 1.8 * temper + 32;
Double resCstoKl = temper + 273.15;
Double resFhtoCs = (temper - 32) * 5 / 9;
Double resFhtoKl = (temper + 459.67) * 5 / 9;
Double resKltoFh = temper * 1.8 - 459.67;
Double resKltoCs = temper - 273.15;
final String Cs = "Cs";
final String Fh = "Fh";
final String Kl = "Kl";
String choice = choose.nextLine();

try {

if (Cs.equals(choice)) {
System.out.println("Enter temperature:" + temp.nextDouble());
System.out.println("Fahrenheit" + resCstoFh);
System.out.println("Kelvin" + resCstoKl);
} else if (Fh.equals(choice)) {
System.out.println("Enter temperature:" + temp.nextDouble());
System.out.println("Celsius" + resFhtoCs);
System.out.println("Kelvin" + resFhtoKl);
} else if (Kl.equals(choice)) {
System.out.println("Enter temperature:" + temp.nextDouble());
System.out.println("Celsius" + resKltoCs);
System.out.println("Fahrenheit" + resKltoFh);
}

} catch (Exception e) {
System.out.println("Error");
}
}

}

Answer 1

I published a working version based on your code at the playground:
https://code.sololearn.com/cob1t33DiOU8/?ref=app
Hope it can help you to fix your problems. If you have any further questions feel free to ask.

Answer 2

Thanks for your help!

Answer 3

obviously you are not entering a proper double value when your program expects it at System.in