How to convert byte[] to Byte[] and the other way around?

Question

How to convert byte[] to Byte[] and also Byte[] to byte[], in the case of not using any 3rd party library?

Is the

Answer 1

From byte[] to Byte[]:

    byte[] b = new byte[]{1,2};
    Byte[] B = new Byte[b.length];
    for (int i = 0; i < b.length; i++)
    {
        B[i] = Byte.valueOf(b[i]);
    }

From Byte[] to byte[] (using our previously-defined B):

    byte[] b2 = new byte[B.length];
    for (int i = 0; i < B.length; i++)
    {
        b2[i] = B[i];
    }