public class Define2DimArray
{
    public static void main(String[] args)
    {
        double[][] numbers; 

                                    //  (4 columns)
        numbers = new double[3][4]; //  x  x  x  x  
                                    //  x  x  x  x  (3 rows)
                                    //  x  x  x  x

    }
}