J2ME problem parsing string to double

[sackstein]

I don't know if this is talked about here since it is mobile development. But I am taking a class in jave me and am having problems parsing a string to a double in the following code:

 public void convertTemperature()
    {

        double result;
        TextField num = new TextField("Enter the number of units you would like to convert", "", 50, TextField.ANY);
        ui_form.append(num);
        str = num.getString();

        try
        {
            numUnits = Double.parseDouble(str);
        }
        catch (NumberFormatException nfe)
        {
        }

        //double fromNum = Double.parseDouble(str);

        TemperatureConverter c  = new TemperatureConverter("Celsius", "Fahrenheit", "This is a temp converter",
                        "Temperature converter", "Temp");
        result = c.convertCF(numUnits);
        res = "" + result;

    }//End convertTemp()

for some reason it is always parsing it as a 0. Can you see anything wrong with this code?

[cs_student]

I don't see anything wrong with it off the top of my head.

What outputs as 0?

There is the possiblity that you are getting a NumberFormatException and numUnits is already assigned to 0, and never gets changed.

What is the contents of str before you try to parse it into a double?