Old Lady trying to learn, Help please!

Question

Hello from this newbie! At 57 I have returned to college. I really am trying to understand Java.
Below is the problem I need to answer, and my code. Can someone please explain what I am doing wrong in plain english, and give suggestions to fix it? I don't want anyone to do the code, but explain what code I need, where, and why.
Thanks in advance of replies...
The assignment states...
"Your worker class will handle both Fahrenheit to Celsius and Celsius to Fahrenheit. Your application class will read in a single value and perform both calculations on that value and output both results. Please use JOptionPane methods for input and output."
//My First Class
//   MAIN
import javax.swing.JOptionPane;
public class ConversionApp
//      METHODS
     private void convertCelciusToFarenheit(double){
     private void convertFarenheitToCelcius(double){
     public static void( String[] args);
     String input = JOptionPane.showInputDialog(null, "Enter which temperature you wish to convert using C or F:");
    String degrees = Double.parseDouble(input);
    if(degrees.equals("C"));
    String input1 = JOptionPane.showInputDialog(null, "Enter Temperature in Celsius to convert:");
    if(degrees.equals("F"));
    String input2 = JOptionPane.showInputDialog(null, "Enter Temperature in Fahrenheit to convert:");
     String FtoC;
     public static double convert(String farenheit){
         double temp = Double.parseDouble( farenheit);
         return ( double ) ( 5.0 / 9.0 * ( temp - 32 ) );
         JOptionPane.showMessageDialog( null, FtoC + " degress Farenheit is " + result + " degrees Celcius",
                 "Conversion Results", JOptionPane.INFORMATION_MESSAGE );
     public int CtoF;
    public static double convert(String celsius){
        double temp = Double.parseDouble( celsius);
        return ( double )  ( temp * 9.0 / 5.0 ) + 32 ;      
        JOptionPane.showMessageDialog( null, CtoF + " degress Celcius is the same as " + " result  " +
        "degrees Farenheit", "Conversion Results", JOptionPane.INFORMATION_MESSAGE );
// My Second Class...
public ConversionWorker {
String FtoC;
     public static double convert(String farenheit){
         double temp = Double.parseDouble( farenheit);
         return ( double ) ( 5.0 / 9.0 * ( temp - 32 ) );
     public int CtoF;
    public static double convert(String celsius){
        double temp = Double.parseDouble( celsius);
        return ( double )  ( temp * 9.0 / 5.0 ) + 32 ;      
}

Answer 1

>private void convertCelciusToFarenheit(double){
     private void convertFarenheitToCelcius(double){
Ok, in here I think you want something like:
public void convertCelciusToFarenheit(double degree)That way, you can then use the number passed as a parameter (degree) in that method, and do math on it. And you need to fix this:
>     public static void main( String[] args)In the future, post exactly what errors you are getting.