public void putR8(double r8){
  long bits=Double.doubleToLongBits(r8);
  putINT64(bits);
}

public void putR8 ( double r8 ) { long bits = Double . doubleToLongBits ( r8 ) ; putINT64 ( bits ) ; }
writes a float64 to this bytebuffer , starting at the current position . advances the current position by 8 .
