void incr1( int b, double y, double yy ) {
    Utils.AtomicDoubleArray.add(_sums,b,y);
    Utils.AtomicDoubleArray.add(_ssqs,b,yy);
  }
void incr1 ( int b , double y , double yy ) { Utils . AtomicDoubleArray . add ( _sums , b , y ) ; Utils . AtomicDoubleArray . add ( _ssqs , b , yy ) ; }
Same, except square done by caller