instantiate an object within javascript

Question

**<%@ page import="com.ampliflex.commons.Ampliflex" %>**
<html>
<head>
<title>Search Result  </title>

<style>
img{ height: 150px; float: left; border: 3;}
div{font-size:10pt; margin-right:150px;
margin-left:150px; }
</style>
 <script type="text/javascript" src="jquery-1.6.1.js"></script>
 <script type="text/javascript">
$(document).ready(function(){
  **Ampliflex ms = Ampliflex.getInstance();
  String mailHost = ms.getMailServer();**
// This function get the search results from Solr server 
    $("#submit").click(function(){
        var query=getquerystring() ; //get the query string entered by user

Here in this, I imported a java class and instantiate its object. but object is not visible and script is generating an error "missing ; before statement Ampliflex ms = Ampliflex.getInstance(); "...i am not getting why so.

EDIT:

The problem is i need to access this mailHost with in javascript. if i instantiate object with in <%.. %> then mailHost is local variable and am not able to access in javascript tag. is there any solution for it.

you're trying to instantiate a server side Object from the client side, JS. think about it again. — asgs
– asgs, Commented Jun 17, 2011 at 5:21
Where (and when) does the Java run? Where (and when) does the JavaScript run? Therein lies the answer. The server-side Java scriptlet tags can emit JavaScript code. However, the scriptlets run before the HTML is sent to the client. — user166390
– user166390, Commented Jun 17, 2011 at 5:27

Ratna Dinakar · Accepted Answer · 2011-06-17 05:39:11Z

2

You are trying to instantiate java object but, without a scriptlet

it should be some thing like

<%

  Ampliflex ms = Ampliflex.getInstance();
  String mailHost = ms.getMailServer();
%>

$(document).ready(function(){ //Mail host var mailHost='<%= mailHost %>';

// This function get the search results from Solr server $("#submit").click(function(){ var query=getquerystring() ;

And, if you want to invoke method after page is loaded, try using ajax.

edited Jun 17, 2011 at 5:39

answered Jun 17, 2011 at 5:22

Ratna Dinakar

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3 Comments

Romi Over a year ago

is it not possible to instantiate object with in java script tag??

Ratna Dinakar Over a year ago

You cannot invoke directly ! You need to use applet or send a request to server !

Romi Over a year ago

The problem is i need to access this mailHost with in javascript. if i instantiate object with in <%.. %> then mailHost is local variable and am not able to access in javascript tag. is there any solution for it.

Sid · Accepted Answer · 2011-06-17 05:23:45Z

1

Problem here is this line:

Ampliflex ms = Ampliflex.getInstance();

  String mailHost = ms.getMailServer();

This is actually Java code. This cannot execute on client side. Use scriptlet tags.

answered Jun 17, 2011 at 5:23

Sid

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