28    private function __construct(){
 
   32    public const UINT8_MAX = 0xff;
 
   33    public const INT8_MIN = -0x7f - 1;
 
   34    public const INT8_MAX = 0x7f;
 
   36    public const UINT16_MAX = 0xffff;
 
   37    public const INT16_MIN = -0x7fff - 1;
 
   38    public const INT16_MAX = 0x7fff;
 
   40    public const UINT32_MAX = 0xffffffff;
 
   41    public const INT32_MIN = -0x7fffffff - 1;
 
   42    public const INT32_MAX = 0x7fffffff;
 
   44    public const UINT64_MAX = 0xffffffffffffffff;
 
   45    public const INT64_MIN = -0x7fffffffffffffff - 1;
 
   46    public const INT64_MAX = 0x7fffffffffffffff;