public class Juhumaatriks {

   public static void main (String[] aaaaa) {
      double [][] x = teeMaatriks (5, 3);
      for (int i=0; i<x.length; i++) {
         for (int j=0; j<x[i].length; j++) {
            System.out.print ("\t" + x[i][j]);
         }
         System.out.println();
      }
   } // main

   public static double[][] teeMaatriks (int m, int n) {
      double[][] tulemus = new double [m][n];
      for (int i=0; i<m; i++) {
         for (int j=0; j<n; j++) {
            tulemus [i][j] = Math.random();
         }
      }
      return tulemus;
   } // teeMaatriks

} // Juhumaatriks