question: private void updateBounds ( ) { this . minimumRangeValue = Double . NaN ; this . minimumRangeValueRow = - 1 ; this . minimumRangeValueColumn = - 1 ; this . maximumRangeValue = Double . NaN ; this . maximumRangeValueRow = - 1 ; this . maximumRangeValueColumn = - 1 ; int rowCount = getRowCount ( ) ; int columnCount = getColumnCount ( ) ; for ( int r = 0 ; r < rowCount ; r ++ ) { for ( int c = 0 ; c < columnCount ; c ++ ) { BoxAndWhiskerItem item = getItem ( r , c ) ; if ( item != null ) { Number min = item . getMinOutlier ( ) ; if ( min != null ) { double minv = min . doubleValue ( ) ; if ( ! Double . isNaN ( minv ) ) { if ( minv < this . minimumRangeValue || Double . isNaN ( this . minimumRangeValue ) ) { this . minimumRangeValue = minv ; this . minimumRangeValueRow = r ; this . minimumRangeValueColumn = c ; } } } Number max = item . getMaxOutlier ( ) ; if ( max != null ) { double maxv = max . doubleValue ( ) ; if ( ! Double . isNaN ( maxv ) ) { if ( maxv > this . maximumRangeValue || Double . isNaN ( this . maximumRangeValue ) ) { this . maximumRangeValue = maxv ; this . maximumRangeValueRow = r ; this . maximumRangeValueColumn = c ; } } } } } } }
target:  Resets the cached bounds, by iterating over the entire dataset to find the current bounds.