For design convenience I need to implement an attribute in a superclass as
double myArray2D = new double[M][N]
which is used in most subclasses with M>>1 and N>>1. However, a couple of subclasses only require
double myArray2D = new double[N]
double myArray1D = new double[N].
Is there a difference in memory allocation and in computational efficency between implementing myArray1D[N] and myArray2D[N]??
Thank you. AGA