Java Generics and numbers

Question

In an attempt to see if I can clean up some of my math code, mostly matrix stuff, I am trying to use some Java Generics. I have the following method:

private <         


        

Answer 1

If you really want to use generics, you could do something like this

private  T[][] zeroMatrix(int row, int col, Class clazz) throws InstantiationException, IllegalAccessException,
        IllegalArgumentException, InvocationTargetException
{
    T[][] retVal = (T[][]) Array.newInstance(clazz, new int[] { row, col });
    for (int i = 0; i < row; i++)
    {
        for (int j = 0; j < col; j++)
        {
            Constructor c = clazz.getDeclaredConstructors()[0];
            retVal[i][j] = c.newInstance("0");
        }
    }

    return retVal;
}

Example:

zeroMatrix(12, 12, Integer.class);