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Thread: Java static method writing to a file

  1. #1
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    Default Java static method writing to a file

    Could someone lead me to the right direction of how I can write my result to a text file? I know how to write to a text file when they're all under one method but can't seem to figure out how when it static method. Thank you

    import java.io.IOException;
    import java.io.PrintWriter;
    import java.io.File;
    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;
        }
     
        //Print the results
        public static void printResults(String [] planetName, double [] diameterKm, double [] massKilo, double[]gravity)
        {   
            System.out.printf("%32s\n","Planetary Data");
            System.out.printf("%-12s %-17s %7s %11s\n","Planet","Diameter(Km)","Mass(Kg)","g(m/s^2)");
            System.out.println("--------------------------------------------------");        
            for(int counter = 0; counter < 9; counter++)
            {
                System.out.printf("%-14s %-14.0f %5.2e %11.2f\n",planetName[counter],diameterKm[counter],massKilo[counter],gravity[counter]);
            }
        }
     
        //Output the results
        public static  void outputData(double[] gravity)throws IOException
        {
           PrintWriter outFile = new PrintWriter(new File("surfaceGravity.txt"));
            double []outputGrav = gravity; 
            for(int index = 0; index < outputGrav.length;index++)
            {
                outFile.println(outputGrav[index]);
            }
        }
     
        public static void main(String[]args) throws IOException
        {
            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 = {4880000,12103600,12756300,6794000,142984000,120536000,51118000,49532000,2274000};
            double [] diameterKm = {4880,12103.6,12756.3,6794,142984,120536,51118,49532,2274 };
            double [] gravity = surfaceGrav(massKilo, diameter);
            printResults(planetName, diameterKm, massKilo, gravity);
            outputData(gravity);
     
     
        }
    }
     
     
        }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Java static method writing to a file

    Please post the full text of any error messages you get.

    can't seem to figure out how when it static method.
    If there are no errors, please describe the problem you are having.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: Java static method writing to a file

    Nevermind, you can delete the thread if needed Norm. I figured it out. Thank you.

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: Java static method writing to a file

    Please mark as solved.
    If you don't understand my answer, don't ignore it, ask a question.

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