static int makeKey(int center, int subcenter, int version) {
    if (center < 0) center = 255;
    if (subcenter < 0) subcenter = 255;
    if (version < 0) version = 255;
    return center * 1000 * 1000 + subcenter * 1000 + version;
  }
static int makeKey(int center, int subcenter, int version) {
    if (center < 0) center = 255;
    if (subcenter < 0) subcenter = 255;
    if (version < 0) version = 255;
    return center * 1000 * 1000 + subcenter * 1000 + version;
  }
static int makeKey ( int center , int subcenter , int version ) { if ( center < 0 ) center = 255 ; if ( subcenter < 0 ) subcenter = 255 ; if ( version < 0 ) version = 255 ; return center * 1000 * 1000 + subcenter * 1000 + version ; }
Make a key from (center, subcenter, version) that provides correct sort order.
Make a key from ( center subcenter version ) that provides correct sort order .