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Thread: Java Static Method

  1. #1
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    Default Java Static Method

    Could someone give me a hints on how I can return the answer to "surfaceGravi" I get incompatibles type when I try to return it to surfaceGravi. Thanks

    public class GravityV1
    {
        // Calculate surface gravity
        public static double surfaceGrav( double []massKilo, double[] diameter)
        {   double gravConstant = 6.67E-11;
            double []surfaceGravi= new double[9];
            for(int count = 0; count < surfaceGravi.length;count++)
            {
            surfaceGravi[count] = ((gravConstant * massKilo[count]) / (Math.pow(diameter[count]/2,2)));
            }
            return surfaceGravi;
        }
     
        public static void main(String[]args)
        {
            String [] planetName = {"Mercury","Venus","Earth","Mars","Jupiter","Saturn","Uranus","Neptune","Pluto"};
            double [] massKilo = {3.30E23,4.869E24,5.972E24,6.4219E23,1.900E27,5.68E26,8.683E25,1.0247E26,1.27E22};
            double [] diameter = {4880,12103.6,12756.3,6794,142984,120536,51118,49532,2274};
     
        }
    }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Java Static Method

    get incompatibles type
    Please post the full text of the error message that shows the source statement where the error happens.
      for(int count = 0; count < 9;count++)
    You should the array's .length attribute to limit the looping, not a magic number:9
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Java Static Method

    I fixed it on the post, thanks. ~Incompatibles type at return surfaceGravi;

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    Default Re: Java Static Method

    What data type is the method defined to return?
    What data type is surfaceGravi?
    If they are not the same or compatible, then you need to change one or the other:
    Either Define the method to return surfaceGravi's type
    Or Return a value of the correct type
    If you don't understand my answer, don't ignore it, ask a question.

  5. The Following User Says Thank You to Norm For This Useful Post:

    maple1100 (January 3rd, 2013)

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    Default Re: Java Static Method

    Oh, I didn't realize one is double and the other one is double array. Thanks you so much!

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