public Hour(int hour,Day day){
  ParamChecks.nullNotPermitted(day,"day");
  this.hour=(byte)hour;
  this.day=day;
  peg(Calendar.getInstance());
}

public Hour ( int hour , Day day ) { ParamChecks . nullNotPermitted ( day , "day" ) ; this . hour = ( byte ) hour ; this . day = day ; peg ( Calendar . getInstance ( ) ) ; }
constructs a new hour .
