The method print(boolean) in the type JspWriter is not applicable for the arguments(void)

[loleta yahyan]

good day

could anyone solve this error ??? it occurs in the below code

for (int i = supportedLocales.length-1; i >= 0; i--)
{
%>
<a class ="langChangeOn"
onclick="javascript:document.repost.locale.value='<%=supportedLocales[i].toString()%>';<%= session.setAttribute("userId",supportedLocales[i].toString())%> ; document.repost.submit();">
<%= supportedLocales[i].getDisplayLanguage(supportedLocales[i])%>
</a>  
<%
}
%>

the error:
org.apache.jasper.JasperException: Unable to compile class for JSP:

An error occurred at line: 101 in the jsp file: /home1.jsp
The method print(boolean) in the type JspWriter is not applicable for the arguments (void)
98: %>
99: <a class ="langChangeOn"
100: onclick="javascript:document.repost.locale.value='<%=supportedLocales[i].toString()%>';
101: <%= session.setAttribute("userId", supportedLocales[i].toString() )%> ; document.repost.submit();">
102: <%= supportedLocales[i].getDisplayLanguage(supportedLocales[i])%>
103: </a>  
104: <%

[Seetharaman Venkatasamy]

I am not quite clear about your java script! but I can give you a hint regarding error that you have got !

hint : HttpSession#setAttribute method dont return anything !

Note: If possible Please avoid scriptlet in your jsp. because now it is difficult to debug right? and use code tag while posting your code.

And Welcome to JavaRanch :)

[loleta yahyan]

thanks Mr.Seetharaman
i will explain the code so you can support me more
the application support two languages (english and arabic)
Locale[] supportedLocales = I18nUtil.getSupportedLocales();
there are two elements in the supported locales: 'en' and 'ar'
the output of the for loop are two links one for arabic language and the other for english language
when the user choose english language by cliking the english link i need the session varaible userId to have the value 'en'
when the user choose arabic language by cliking the arabic link i need the session varaible userId to have the value 'ar'

i will use the session variable userId later to identify which CSS will be used based on the selected language .
please support me to correct the error in the code and if you want more explanation i will be glad lo explain more :)
hint:the code is running correctly until i put this sentence<%= session.setAttribute("userId",supportedLocales[i].toString())%> then the error is occured

[Seetharaman Venkatasamy]

I answer your question already! set the selected language on server side! more over, scriptlet executed long before your client code. why cant you use simple href and append the value? or onclick submit form.

regarding your error: you cant display nothing/void. for example try below code

public class Test
{
	static void print()
	{
		//nothing returned
	}
	
	public static void main(String[] args) 
	{
		System.out.println(print());
	}

}

<edit>enabled smilies</edit>

[Seetharaman Venkatasamy]

and you can think <%= %> as System.out.println()

[Bear Bibeault]

Seetharaman Venkatasamy wrote:and you can think <%= %> as System.out.println()

Not correct. A scriptlet expression will emit its output to the response; System.out will emit to the console. They're not at all alike.

But when it comes down to it, this is 2011! Why are scriptlets and scriptlet expressions still being used? They've been discredited since the introduction of JSP 2 almost 10 years ago!

[Seetharaman Venkatasamy]

Bear Bibeault wrote:Why are scriptlets and scriptlet expressions still being used? They've been discredited since the introduction of JSP 2 almost 10 years ago!

Indeed

[loleta yahyan]

Thanks for reply :) .actually this is an open source software called dspace for digital library I try to do simple customization for it to meet my needs
this website is do the same what I need http://repository.ksu.edu.sa/jspui/ when you access the website there are two links for the languages and when you choose one of them the body direction changes from left to right or from right to left accordinary
I try to do the same customization in my website and I notice that they use different style sheet for each language
below is the original code before any customization ,you will notice that I couldn't use href because there is no destination and also there is no action in the submited form :(
and I am very beginner in java coding
does anyone knows how to do that ?

<%--
  - home.jsp
  -
  - Version: $Revision: 3705 $
  -
  - Date: $Date: 2009-04-11 17:02:24 +0000 (Sat, 11 Apr 2009) $
  -
  - Copyright (c) 2002, Hewlett-Packard Company and Massachusetts
  - Institute of Technology.  All rights reserved.
  -
  -       --%>

<%--
  - Home page JSP
  -
  - Attributes:
  -    communities - Community[] all communities in DSpace
  --%>

<%@ page contentType="text/html;charset=UTF-8" %>

<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>

<%@ taglib uri="http://www.dspace.org/dspace-tags.tld" prefix="dspace" %>

<%@ page import="java.io.File" %>
<%@ page import="java.util.Enumeration"%>
<%@ page import="java.util.Locale"%>
<%@ page import="javax.servlet.jsp.jstl.core.*" %>
<%@ page import="javax.servlet.jsp.jstl.fmt.LocaleSupport" %>
<%@ page import="org.dspace.core.I18nUtil" %>
<%@ page import="org.dspace.app.webui.util.UIUtil" %>
<%@ page import="org.dspace.content.Community" %>
<%@ page import="org.dspace.core.ConfigurationManager" %>
<%@ page import="org.dspace.browse.ItemCounter" %>

<%
    Community[] communities = (Community[]) request.getAttribute("communities");

    Locale[] supportedLocales = I18nUtil.getSupportedLocales();
    Locale sessionLocale = UIUtil.getSessionLocale(request);
    Config.set(request.getSession(), Config.FMT_LOCALE, sessionLocale);
    String topNews = ConfigurationManager.readNewsFile(LocaleSupport.getLocalizedMessage(pageContext, "news-top.xml"));
    String sideNews = ConfigurationManager.readNewsFile(LocaleSupport.getLocalizedMessage(pageContext, "news-side.html"));

    boolean feedEnabled = ConfigurationManager.getBooleanProperty("webui.feed.enable");
    String feedData = "NONE";
    if (feedEnabled)
    {
        feedData = "ALL:" + ConfigurationManager.getProperty("webui.feed.formats");
    }
    
    ItemCounter ic = new ItemCounter(UIUtil.obtainContext(request));
%>

<dspace:layout locbar="nolink" titlekey="jsp.home.title" feedData="<%= feedData %>">

    <table  width="95%" align="center">
      <tr align="right">
        <td align="right">						
<% if (supportedLocales != null && supportedLocales.length > 1)
{
%>
        <form method="get" name="repost" action="">
          <input type ="hidden" name ="locale"/>
        </form>
<%
for (int i = supportedLocales.length-1; i >= 0; i--)
{
%>
        <a class ="langChangeOn"
                  onclick="javascript:document.repost.locale.value='<%=supportedLocales[i].toString()%>';
                  document.repost.submit();">
                 <%= supportedLocales[i].getDisplayLanguage(supportedLocales[i])%>
        </a>  
<%
}
}
%>
        </td>
      </tr>
      <tr>
            <td class="oddRowEvenCol"><%= topNews %></td>
        </tr>
    </table>
    <br/>
    <form action="<%= request.getContextPath() %>/simple-search" method="get">
        <table class="miscTable" width="95%" align="center">
            <tr>
                <td class="oddRowEvenCol">
                  <h3><fmt:message key="jsp.home.search1"/></h3>
                      <p><label for="tquery"><fmt:message key="jsp.home.search2"/></label></p>
                      <p><input type="text" name="query" size="20" id="tquery" /> 
                         <input type="submit" name="submit" value="<fmt:message key="jsp.general.search.button"/>" /></p>
                </td>
            </tr>
        </table>
    </form>
    <table class="miscTable" width="95%" align="center">
        <tr>
            <td class="oddRowEvenCol">
               <h3><fmt:message key="jsp.home.com1"/></h3>
                <p><fmt:message key="jsp.home.com2"/></p>


<%
 if (communities.length != 0)
 {
%>
    <table border="0" cellpadding="2">
<% 	                 

    for (int i = 0; i < communities.length; i++)
    {
%>                  <tr>
                        <td class="standard">
                            <a href="<%= request.getContextPath() %>/handle/<%= communities[i].getHandle() %>"><%= communities[i].getMetadata("name") %></a>
<%
        if (ConfigurationManager.getBooleanProperty("webui.strengths.show"))
        {
%>
            [<%= ic.getCount(communities[i]) %>]
<%
        }

%>
                        </td>
                    </tr>
<%
    }
%>
    </table>
<%                
 }
%>  

            </td>
        </tr>
    </table>
    <dspace:sidebar>
    <%= sideNews %>
    <%
    if(feedEnabled)
    {
	%>
	    <center>
	    <h4><fmt:message key="jsp.home.feeds"/></h4>
	<%
	    	String[] fmts = feedData.substring(feedData.indexOf(':')+1).split(",");
	    	String icon = null;
	    	int width = 0;
	    	for (int j = 0; j < fmts.length; j++)
	    	{
	    		if ("rss_1.0".equals(fmts[j]))
	    		{
	    		   icon = "rss1.gif";
	    		   width = 80;
	    		}
	    		else if ("rss_2.0".equals(fmts[j]))
	    		{
	    		   icon = "rss2.gif";
	    		   width = 80;
	    		}
	    		else
	    	    {
	    	       icon = "rss.gif";
	    	       width = 36;
	    	    }
	%>
	    <a href="<%= request.getContextPath() %>/feed/<%= fmts[j] %>/site"><img src="<%= request.getContextPath() %>/image/<%= icon %>" alt="RSS Feed" width="<%= width %>" height="15" vspace="3" border="0" /></a>
	<%
	    	}
	%>
	    </center>
	<%
	    }
	%>
    </dspace:sidebar>
</dspace:layout>

and this is the code of the header.jsp

<%--
  - header-home.jsp
  -
  - Version: $Revision: 4646 $
  -
  - Date: $Date: 2009-12-23 06:42:08 +0000 (Wed, 23 Dec 2009) $
  -
  - Copyright (c) 2002, Hewlett-Packard Company and Massachusetts
  - Institute of Technology.  All rights reserved.
  -
      --%>

<%--
  - HTML header for main home page
  --%>

<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
<%@ taglib uri="http://www.dspace.org/dspace-tags.tld" prefix="dspace" %>

<%@ page contentType="text/html;charset=UTF-8" %>

<%@ page import="java.util.List"%>
<%@ page import="java.util.Enumeration"%>
<%@ page import="org.dspace.app.webui.util.JSPManager" %>
<%@ page import="org.dspace.core.ConfigurationManager" %>
<%@ page import="org.dspace.app.util.Util" %>
<%@ page import="javax.servlet.jsp.jstl.core.*" %>
<%@ page import="javax.servlet.jsp.jstl.fmt.*" %>

<%
    String title = (String) request.getAttribute("dspace.layout.title");
    String navbar = (String) request.getAttribute("dspace.layout.navbar");
    boolean locbar = ((Boolean) request.getAttribute("dspace.layout.locbar")).booleanValue();

    String siteName = ConfigurationManager.getProperty("dspace.name");
    String feedRef = (String)request.getAttribute("dspace.layout.feedref");
    boolean osLink = ConfigurationManager.getBooleanProperty("websvc.opensearch.autolink");
    String osCtx = ConfigurationManager.getProperty("websvc.opensearch.svccontext");
    String osName = ConfigurationManager.getProperty("websvc.opensearch.shortname");
    List parts = (List)request.getAttribute("dspace.layout.linkparts");
    String extraHeadData = (String)request.getAttribute("dspace.layout.head");
    String dsVersion = Util.getSourceVersion();
    String generator = dsVersion == null ? "DSpace" : "DSpace "+dsVersion;
	String userid=(String)session.getAttribute("userId") ;
	if (session.getAttribute("userId")==null)
	userid="ar"; 
%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
    <head>
        <title><%= siteName %>: <%= title %></title>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
        <meta name="Generator" content="<%= generator %>" />	
 <link rel="stylesheet" href="<%= request.getContextPath() %>/styles.css.jsp" type="text/css" />
<%
    if (!"NONE".equals(feedRef))
    {
        for (int i = 0; i < parts.size(); i+= 3)
        {
%>
        <link rel="alternate" type="application/<%= (String)parts.get(i) %>" title="<%= (String)parts.get(i+1) %>" href="<%= request.getContextPath() %>/feed/<%= (String)parts.get(i+2) %>/<%= feedRef %>"/>
<%
        }
    }
    
    if (osLink)
    {
%>
        <link rel="search" type="application/opensearchdescription+xml" href="<%= request.getContextPath() %>/<%= osCtx %>description.xml" title="<%= osName %>"/>
<%
    }

    if (extraHeadData != null)
        { %>
<%= extraHeadData %>
<%
        }
%>
        
    <script type="text/javascript" src="<%= request.getContextPath() %>/utils.js"></script>
    <script type="text/javascript" src="<%= request.getContextPath() %>/static/js/scriptaculous/prototype.js"> </script>
    <script type="text/javascript" src="<%= request.getContextPath() %>/static/js/scriptaculous/effects.js"> </script>
    <script type="text/javascript" src="<%= request.getContextPath() %>/static/js/scriptaculous/builder.js"> </script>
    <script type="text/javascript" src="<%= request.getContextPath() %>/static/js/scriptaculous/controls.js"> </script>
    <script type="text/javascript" src="<%= request.getContextPath() %>/static/js/choice-support.js"> </script>
    </head>

    <%-- HACK: leftmargin, topmargin: for non-CSS compliant Microsoft IE browser --%>
    <%-- HACK: marginwidth, marginheight: for non-CSS compliant Netscape browser --%>
    <body>

        <%-- DSpace top-of-page banner  nowrap="nowrap" valign="middle" --%>
        <%-- HACK: width, border, cellspacing, cellpadding: for non-CSS compliant Netscape, Mozilla browsers --%>
        <table class="pageBanner" width="100%" border="0" cellpadding="0" cellspacing="0">

            <%-- DSpace logo --%>
            <tr>
                 <td>
                    <a href="<%= request.getContextPath() %>/"><img src="<%= request.getContextPath() %>/image/banner-largef.jpg" alt="<fmt:message key="jsp.layout.header-default.alt"/>" width="600" height="150" border="0"/></a></td>
                   
                <td background="<%= request.getContextPath() %>/image/left3.jpg"  width="100%" height="150" >
               <a href="<%= request.getContextPath() %>/"></a>
                </td>
            </tr>
            <tr class="stripe"> <%-- Blue stripe --%>
                <td colspan="3"> </td>
            </tr>
        </table>

        <%-- Localization --%>
<%--  <c:if test="${param.locale != null}">--%>
<%--   <fmt:setLocale value="${param.locale}" scope="session" /> --%>
<%-- </c:if> --%>
<%--        <fmt:setBundle basename="Messages" scope="session"/> --%>

        <%-- Page contents --%>

        <%-- HACK: width, border, cellspacing, cellpadding: for non-CSS compliant Netscape, Mozilla browsers --%>
        <table class="centralPane" width="99%" border="0" cellpadding="3" cellspacing="1">

            <%-- HACK: valign: for non-CSS compliant Netscape browser --%>
            <tr valign="top">

            <%-- Navigation bar --%>
<%
    if (!navbar.equals("off"))
    {
%>
            <td class="navigationBar">
                <dspace:include page="<%= navbar %>" />
            </td>
<%
    }
%>
            <%-- Page Content --%>

            <%-- HACK: width specified here for non-CSS compliant Netscape 4.x --%>
            <%-- HACK: Width shouldn't really be 100%, but omitting this means --%>
            <%--       navigation bar gets far too wide on certain pages --%>
            <td class="pageContents" width="100%">

                <%-- Location bar --%>
<%
    if (locbar)
    {
%>
                <dspace:include page="/layout/location-bar.jsp" />
<%
    }
%>