public void drawStdDevLine(Graphics2D g2d,Long stdDevVal,long yMaxMark,Color color){
  float stdDevPerc=stdDevVal / (float)yMaxMark;
  g2d.setColor(color);
  int yPosOfLine=this.graphBottom - Math.round(this.graphHeight * stdDevPerc);
  g2d.drawLine(this.graphLeft,yPosOfLine,this.graphRight,yPosOfLine);
}

public void drawStdDevLine ( Graphics2D g2d , Long stdDevVal , long yMaxMark , Color color ) { float stdDevPerc = stdDevVal / ( float ) yMaxMark ; g2d . setColor ( color ) ; int yPosOfLine = this . graphBottom - Math . round ( this . graphHeight * stdDevPerc ) ; g2d . drawLine ( this . graphLeft , yPosOfLine , this . graphRight , yPosOfLine ) ; }
used to draw the low and high standard devition lines on the line graph
