Learning Java ColdWeatherDay

Any suggestions that would get this run , I would greatlya appreciated it.


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package coldweathertester;
public class ColdWeatherDay        
{
   public ColdWeatherDay(double inittemp, double initvelocity)
   {

   {
    temp = inittemp;
    velocity = initvelocity;
   }  
           
   // public double getTemperature()
   // {
       
  //  }
    public double getVelocity()
    {
        return velocity;
       
    }
    public void changeVelocity(double newSpeed)
    {
         
    }
    public findWindChill()
    {
       double windchill = 35.74 + 0.6215*t + (0.4275*t - 35.75) * Math.pow(v, 0.16);
       return windchill;
    }
private double temp;
private double velocity;
private double windchill;


}

}
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package coldweathertester;
import javax.swing.JOptionPane;

    public class ColdWeatherTester
{  
    public static void main(String[] args)
    {
       double temp = 5.0;
       double velocity = 10.0;
     
       ColdWeatherDay day = new ColdWeatherDay(temp, velocity);
       
       
       System.out.println("Wind Speed: " + day.getVelocity());
       System.out.println("Temp is: " + day.findWindChill());    
       
       
       //Add Code that prompts the user to enter a new wind speed
       // and then changes the wind speed of the day to the value entered.
       
       input = JOptionPane.showInputDialog("Enter in a new wind speed");
       temp = Double.parseDouble(input);
       
       
       System.out.println("Wind Speed: " + day.getVelocity());
       System.out.println("Temp is: " + day.getfindWindChill);
       
               
    }

}