[SOLVED] Calculating Std. Deviation using Java

I'm sure this has been posted before, but I'm just having a little tough time with it. The sum and mean calculates correctly but for some reason the standard deviation doesn't calculate correctly, here's my code. Any help is great appreciated =D

Code:

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        private static double stddev(double[] doubleArray) {
                int i ;
                double avg = 0 ;
                double sum = 0 ;
                double tempSum = 0 ;
               
                // sum of the array
            for(i = 0; i < doubleArray.length; i++) {
                sum = sum + doubleArray[i] ;
                System.out.println(sum) ;
            }
           
            // average of the array
            avg = sum / (doubleArray.length) ;
            System.out.println("Mean = " + avg) ;
           
            // the length of the array minus 1
            tempSum = (doubleArray.length) - 1 ;

            // (x - average of x's)^2
            for(i = 0; i < doubleArray.length; i++) {
            sum = sum + (Math.abs(doubleArray[i] - avg) * Math.abs(doubleArray[i] - avg)) ;
            }
           
            // (x - average of x's)^2 divided by length of the array minus 1
            sum = sum / tempSum ;


        if (i == 0) {
                return 0.0 ;                               
        }
       
        // sqrt of the above
    return Math.sqrt(sum) ;
}



public static void main(String[] args) {
        //***********************************************************
        // Testing standard deviation
        System.out.println("Testing variance\n");

        double[] testDoubleArray = { 2.0, -3, 5, 6.0, 0.0 };

        // You should try these test cases too
        //double[] testDoubleArray = { 2.0, 2.0 };
        //double[] testDoubleArray = {}

        System.out.println("Test array for standard deviation is: ");
        for (i=0; i < testDoubleArray.length; i++) {
                System.out.print(testDoubleArray[i] + " ");
        }
        System.out.println("\nStandard deviation is: " + stddev(testDoubleArray));

        System.out.println("\n***************************");

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Just to let you know but I need to have it in this format, but what I'm stuck on is the calculations part. Thank you =D

Never mind I solved it