在线等答案

笨程序是为了生成登陆验证码：
代码：<%@ page contentType="image/jpeg" import ="java.awt.*,java.awt.image.*,java.util.*,javax.imageio.*" %>
<%!
Color getRandColor(int fc,int bc)
{
Random random=new Random();
if(fc>255)fc=255;
if(bc>255)bc=255;
int r=fc+random.nextInt(bc-fc);
int g=fc+random.nextInt(bc-fc);
int b=fc+random.nextInt(bc-fc);
return new Color(r,g,b);
}
%>
<%
response.setHeader("Pragma","No-cache");
response.setHeader("Cache-Control","no-cache");
response.setHeader("Expires","0");
int width=60,height=20;
BufferedImage image=new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
Graphics g=image.getGraphics();
Random random=new Random();
g.setColor(getRandColor(200,250);
g.fillRect(0,0,width,height);
g.setFont(new Font("Times New Roman",Font.PLAIN,18));
g.setColor(getRandColor(160,200));
for(int i=0;i<155;i++)
{
int x=random.nextInt(width);
int y=random.nextInt(height);
int x1=random.nextInt(12);
int y1=randon.nextInt(12);
g.drawLine(x,y,x+x1,y+y1);
}
String sRand="";
for(int i=0;i<4;i++)
{
String rand=String.valueOf(random.nextInt(10));
sRand+=rand;

g.setColor(new Color(20+random.nextInt(110),20+random.nextInt(110),20+random.nextInt(110)));
g.drawString(rand,13*i+6,16);
}
session.setAttribute("rand",sRand);
g.dispose();
ImageIo.write(image,"JPEG",response.getOutputStream());

%>报错：
org.apache.jasper.JasperException: 无法编译JSPAn error occurred at line: 14 in the jsp file: /image.jsp
Generated servlet error:
Syntax error, insert ")" to complete Expression
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)