Thread: Creating methods with Arrays

I'm trying to make my program write to a file using two methods. It compiles with no errors, but when the file that it wrote to is opened, only coordinates with (0,0) are printed. Its supposed to print 10000 random coordinated from the array. Why does it only print out (0,0) coordinates? Also did I place my return statement in the correct place?

import java.io.*;
 
public class program
{
  public static void main (String [] args) throws IOException
  {
 
    int points = 10000, dimension = 2, lengthA = 100;//int variables are declared and initialized
 
    PrintWriter fileOut = new PrintWriter (new FileWriter ("arrayPoints.txt"));
 
    double length [] = new double [dimension];//array for length is declared
    double coordinate [][] = new double [points][dimension];//coordinate array is declared
 
    for (int i = 0; i < points; i++){
      fileOut.println(java.util.Arrays.toString(coordinate[i]));
                      }
      fileOut.close();//writes to file
 
  }//end main method
 
    public static double writeTofile (double length[], double coordinate[][], int points, int dimension, int lengthA)
    {
      int x = 0, y = 0;
      for(int z = 0; z < dimension; z++){//fills the length array with the the set value of lengthA
      length[z] = lengthA;
      }
 
    for(x = 0; x < points; x++){//runs 1000 times to print 1000 data points
      for (y = 0; y < dimension; y++){//runs 2 times to print an x and y coordinate
        coordinate [x][y]= (2 *Math.random() - 1) * length[y];// finds a random number in the range and assiigns it to the coordinate array
      }//end for
    }//end for
    return coordinate[x][y];
  }//main method
}//program

You never ever call the writeToFile method

I've change it and called it herre:

for (int i = 0; i < points; i++){
      fileOut.println(writeTofile(coordinate[i]));
                      }
      fileOut.close();//writes to file

however when I compile it it gives me the error

writeTofile(double[],double[][],int,int,int) in program cannot be applied to (double[])

The error means you can not call a method with the single parameter of type double[] because the method requires the 5 parameters listed in the error message. (The same 5 the the method is declared with)