Help with negative numbers

[cela0811]

I'm writing a calculator in Java and I am having trouble with negative numbers. The numbers are stored in and array of strings, called input, and Output is a text field where I display my results. Temp is a double. When I run the program and enter a negative number, it acts as if it is positive. I convert a string to a double, multiply by -1, and convert back to a string to display. What is wrong? Here is the relevant code:
{
temp = Double.parseDouble(input[2]);
temp = -1 * temp;
Output.setText(temp.toString());
}

P.S. Is there a special way to format code? If so, what is it?

[KevinWorkman]

I'm not sure what your actual problem is. This seems to work fine for me:

public class Test{
	public static void main(String[] args){
		String stringD = "-1";
		double doubleD = Double.parseDouble(stringD);
		System.out.println(doubleD);
	}
}

PS- Quote my message to see code tags in action.

[cela0811]

I fixed it. It turns out that while I updated the display, I didn't store the new value in my input array. I have another class which takes the input and finds the result, but it never got the new value. That was stupid of me.

public class Main
   public static void main(String args[])  {
    System.out.println("Thanks for telling me about the code tags.");
    }