Please help me with my program

Hi I am new to Java and I am using jgrasp. My assignment is to convert celsius to fahrenheit and vice versa. I can't seem to get the right calculations, can somebody please see what is wrong?

Here is my driver:

Code:

---

  import java.util.Scanner;

    public class Driver
  {
      public static void main(String args[])
      {
      // Declare variables for user input
     
        double degrees;
        double Celsius;
        String scale;
        String endScale;
        double getCelsius;
        double getFahrenheit;
      // Create a Scanner object to read from the keyboard
        Scanner keyboard = new Scanner (System.in);
     
      // Get the temperature and scale from user
        System.out.print("Enter the temperature: ");
        degrees = keyboard.nextDouble();
        scale = keyboard.nextLine().trim();
     
      // Declare and instantiate an object reference variable
     
        Temperature outsideTemp = new Temperature();
     
      // Set the outside temperature based on the user input
        if (scale.equalsIgnoreCase("C"))
            outsideTemp.setCelsius(degrees);
        else
            outsideTemp.setFahrenheit(degrees);
     
        System.out.print("How would you like the temperature displayed (C or F)?");
        endScale = keyboard.nextLine();
      // Get the scale to display the temperature from the user
     
        if (endScale.equalsIgnoreCase("C"))
            System.out.print("The temperature is " + outsideTemp.getCelsius());
        else
            System.out.print("The temperature is " + outsideTemp.getFahrenheit());
             
      // Display the temperature based on the user's desired scale
        System.out.print(" degrees " + endScale);
      }
 
  }

---

Here is my class:

Code:

---

    public class Temperature
  {
  // Instance variable
      private double degreesKelvin;      // degrees in Kelvin
      double Celsius;      // degrees in Celsius   
      double Fahrenheit;
   
  // Constructor method: initialize degreesKelvin to zero
      public Temperature()
      {
        degreesKelvin = 0;
           
      }
 
  // Convert and save degreesCelius in the Kelvin scale
      public void setCelsius(double Celsius)
      {
        degreesKelvin = Celsius + 273.16;
      }
 
  // Convert degreesKelvin to Celsius and return the value
      public double getCelsius()
      {
        Celsius = degreesKelvin - 273.16;
        return Celsius;
      }
 
  // Convert and save degreesFahrenheit in the Kelvin scale
      public void setFahrenheit(double Fahrenheit)
      {
        degreesKelvin = (( 5 / 9 ) * (Fahrenheit - 32)) + 273.16;
      }
 
  // Convert degreesKelvin to Fahrenheit and return the value
 
      public double getFahrenheit()
      {
        Fahrenheit    = ((degreesKelvin - 273.16) * (9 / 5 )) + 32;
        return Fahrenheit;
      }
 
  }

---

Everything compiles, I just dont get the right answer.

I don't get why you created a class for Temperature with instance variables, where to get any conversion needs 2 calls, one to set the input and one to get the output.

would static functions work here ?

Code:

---

class Temperature {
  // no instance variables  (and in practice, we wouldnt create an instance even)
 
  public static double celsiusToKelvin(double celsius)
  {
    return celsius + 273.16;
  }
 
  public static double kelvinToCelsius(double degreesKelvin)
  {
  return degreesKelvin - 273.16;
  }
 
  public static double fahrenheitToKelvin(double fahrenheit)
  {
    return (( 5 / 9 ) * (fahrenheit - 32)) + 273.16;
  }
 
    public static double kelvinToFahrenheit(double degreesKelvin)
  {
  return ((degreesKelvin - 273.16) * (9 / 5 )) + 32;
  }

  public static double celciusToFahrenheit(double degreesCelsius) {
    return kelvinToFahrenheit(celsiusToKelvin(degreesCelsius));
  }
 
  public static double farenheitToCelsius(double degreesFahrenheit) {
    return kelvinToCelsius(farenheitToCelsius(degreesFahrenheit));
  }
}

---

so, to use this

Code:

---

    double degrees = keyboard.nextDouble();
    String scale = keyboard.nextLine().trim();

    double outsideTemp = 0;

    System.out.print("How would you like the temperature displayed (C or F)?");
    String endScale = keyboard.nextLine();

    // Set the outside temperature based on the user input
    if (scale.equalsIgnoreCase("C")) {
      if (endScale.equalsIgnoreCase("C")) {
        // wow, nothing to do. celcius in celcius out
        outsideTemp = degrees;
      }
      else {
        outsideTemp = Temperature.celciusToFahrenheit(degrees);
      }
    }
    else {
      if (endScale.equalsIgnoreCase("C")) {
        outsideTemp = Temperature.farenheitToCelsius(degrees);
      }
      else {
        // farenheit in, farenheit out
        outsideTemp = degrees;
      }
    }

    // Get the scale to display the temperature from the user

    System.out.print("The temperature is " + outsideTemp + " deg " + endScale);

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