JSP can't resolve variable name

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This topic has 2 replies, 2 voices, and was last updated 19 years, 8 months ago by kitm.

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January 30, 2005 at 3:32 pm #224020 Reply

imm102

Member

hi,

Im trying to complete my first useful jsp (i had previously only done the hello world example) and i am getting quite a few errors which are confusing me. The code is below

<%@ page language="java" import="java.util.*, javax.naming.*, 
info.amadeusserver.interfaces.*, info.amadeusserver.ejb.*" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

    InitialContext ic = null;
    ic = new InitialContext();
    DevicesHome home = (DevicesHome)ic.lookup("java:comp/env/Test");
    Devices devs = home.create();
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>The UDK Main Page 'devices.jsp' starting page</title>
    
    <meta http-equiv="description" content="UDK Server Main Page">
    
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->
  </head>
  
  <body>
    <H1><%= devs.getServerName() %></H1> <br>
    <H2><%= devs.getHomeAddress() %></H2> <br><br>
    <TABLE BORDER=1 BORDERCOLOR =SILVER BGCOLOR=IVORY CELLPADDING=5>
    <% List devtable = devs.getAllDevices(); %>  
    <%! String[] headerRow = (String[])devtable(0); %>
    <% for (int i = 0; i<headerRow.length; i++) { %>
        <TR><TH ALIGN=LEFT> <%= headerRow[i] %> </TH></TR>
    <% } %>
    <% for (int i = 1; i<devtable.size(); i++) { %>
        <% String[] row = (String[])devtable.get(i); %>
        <% for (int r = 0; r<row.length; r++) { %> 
            <TR><TD> <%= row[r] %> </TD></TR>
        <% } %>
    <% } %>
  </body>
</html>

All the method calls and the first occurance of the devs variable get underlined in red despite being correct. Ive imported all the relavent classes at the start. I also get an error at the

<%! String[] headerRow = (String[])devtable(0); %>

which says

cannot resolve symbol: symbol :method devtable(int)

Does anyone have any idea why? im stumped been puzzling over it all day. Its probs somethings obvious that im not spotting.

Cheers
Ian

January 30, 2005 at 3:36 pm #224021 Reply

imm102

Member

Sorry i forgot to mention my system stats

Windows XP
Eclipse 3.0.1
MyEclipse 3.8.3 fresh install
No more plugins

January 31, 2005 at 8:53 pm #224124 Reply

kitm

Member

Ian,

Not sure about the method call and devs underlines, but I believe your code:

<%! String[] headerRow = (String[])devtable(0); %>

needs to be:


 <%! String[] headerRow = (String[])devtable.get(0); %>

HTH,
-Kit

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JSP can’t resolve variable name