jsp中request.getParameterValues返回数组报错

初学jsp遇到以下问题
使用tomcat服务器，eclipse

vadio8.java


<%@ page language="java" contentType="text/html"
         pageEncoding="utf-8" import = "java.util.*"%>
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" content = "text/html; charset=utf-8">
    <title>Title</title>
</head>
<body>
    <%
    String[] special = request.getParameterValues("text");
    System.out.println(special[1]);
    %>


</body>
</html>

info.html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
    <form action="vadio8.jsp">
        <h3>专长</h3>
        <input type="checkbox" name="text" value="0">C语言
        <input type="checkbox" name="text" value="1">Java
        <input type="checkbox" name="text" value="2">JSP
    </form>
</body>
</html>

报以下错误
HTTP Status 500 – Internal Server Error

Type 异常报告

消息在 [13] 行处理 [vadio8.jsp] 时发生异常

描述服务器遇到一个意外的情况，阻止它完成请求。

Exception
org.apache.jasper.JasperException: 在 [13] 行处理 [vadio8.jsp] 时发生异常

10:

11: <%
12: String[] special = request.getParameterValues("text");
13: System.out.println(special[1]);
14: %>
15:

16:

Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:626)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:515)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

Root Cause
java.lang.NullPointerException
org.apache.jsp.vadio8_jsp._jspService(vadio8_jsp.java:130)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:477)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

):注意主要问题的全部 stack 信息可以在 server logs 里查看

String[] special = request.getParameterValues("text"); 这个根本没有获取到值