Maksud dari Counter(Ctr) dan index pada code itu apa ya?

ImageIcon hStandR[] = new ImageIcon[2]; ImageIcon hStandL[] = new ImageIcon[2]; ImageIcon cStandR[] = new ImageIcon[2]; ImageIcon cStandL[] = new ImageIcon[2];

int hStandCtr; int hStandIndex; int cStandCtr; int cStandIndex;