java绘制一个成交量的统计图

Point ioc=evt.getPoint();
          X=ioc.x;
          Y=ioc.y;
          Graphics gten;
          gten=getGraphics();
          gten.setXORMode(Color.white);
          gten.setColor(Color.blue);
          int Axsis;


          if(ioc.x >leftMargine & ioc.x< w+leftMargine & ioc.y>topMargine & ioc.y<h+topMargine){
            try{
               Axsis=(X-leftMargine)/hx;        //设定横座标范围
                //在以下区域内，把鼠标当前横座标处的各种股票参数显示在相应的标签上
                 label[0].setText(xCode[Axsis]);
                 label.setText(Float.toString(yData[Axsis]));
                 float pcent=(xPce[Axsis]/100);
                 label.setText(Float.toString(pcent));
            }
            catch(Exception err){
            }
            try{
              if(y0 >topMargine & y0< h+topMargine)
                gten.drawLine(leftMargine,y0,w+leftMargine,y0);
              if(Y >topMargine & Y< h+topMargine)
                gten.drawLine(leftMargine,Y,w+leftMargine,Y);
              if(x0 >leftMargine & x0< w+leftMargine)
                gten.drawLine(x0,topMargine,x0,h+topMargine);
              if(X >leftMargine & X< w+leftMargine)
      &nbs