Raghu Shree

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since Mar 18, 2005

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Recent posts by Raghu Shree

Need more detail of PortableRemoteObject.narrow

Using lookup method we can get the remote home object, we need to cast the return object to our desired remote home object. But we can�t explicity casting thsese object because of CORBA standards. (casting is not native). Java RMI-IIOP standards provides the PortbaleRemoteObject.narrow() method to casting the object to appropriate type.

Note: If we using Local interface we can do explicit casting as normal java way.

17 years ago

EJB Certification (OCEEJBD)

doubt

Hi,
This error is not only comes from Boolean object. Whenever we try to add two object, compiler shows error message. Below code snippets are show compiler error.

Integer I1 = new Integer(10);
Integer I2 = new Integer(100);
System.out.println ("" + I1+I2); //Compile fines
System.out.println (I1+I2); // show error

If we concatenate the string to any object the toString() method is executed. In wrapper classes the toString() method returns String value.
So the above code shows 10100 in first print Statement.

18 years ago

Programmer Certification (OCPJP)

Factory Pattern - help needed !!!!

Hi,
The factory pattern is a creational pattern. Think the follwing scenario to used factory pattern

1. When the class doesn't know which class of object to be create.
2. A class specifies its subclasses to specify which class object to be create.
3. Based the value the subclass decide to create the specified object.

18 years ago

Web Component Certification (OCEJWCD)

public class access

Hi,
Normally CLASSPATH is used to locate the specified jar/class file. not for the specified folder. for example [b] set CLASSPATH = c:\jdk\lib\tools.jar;
You give the path in PATH variable. ex [b] set PATH=c:\jdk\bin;%PATH$;.
Do the following steps. add ;.; in your classpath. It specifies the current working directory. So comiler first check the given class file is available in current folder. If it is not present then after search other jar files.

18 years ago

Programmer Certification (OCPJP)

Problem in starting Tomcat.

Hi,
To sortout the problem using debug method in Tomcat. follow the below steps

1. Goto comamnd prompt
2. enter catalina debug
3. After receiving the prompt > enter run
4. Now tomcat is start without any problems. if it is have some problem to start it display the error message in dos prompt window.

18 years ago

Tomcat

javascript problem

Hi,
I think it is possible. Refer the following snippets.

<html>
<head>
<title>JS in Body</title>
</head>
<body>
<form name="test">
<script language="javascript">
alert("welcome to Java Ranch");
</script>
</form>
</body>
</html>

18 years ago

HTML Pages with CSS and JavaScript

How to register for SCJP

Hi,
see this page. www.2test.com

18 years ago

Programmer Certification (OCPJP)

not getting the EL

Hi Bhavna ,
I can reproduce your problem in my machine. I think the problem is in web.xml. Change your <web-app> tag like below

<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4">

This tag will enable the EL expression in your jsp file. And also add the directive <%@ page isELIgnored="false" %> (optional) in your jsp file.

I have reproduced the same problem to change the web.xml <web-app> tag like below

<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">

This tag is used for to disable the el expression in our web application.
Hope this will helps you.

Reply with the result

18 years ago

Web Component Certification (OCEJWCD)

not getting the EL

Hi
Add this directive to your jsp file.
<%@ page isELIgnored="false" %>
[ October 20, 2005: Message edited by: Raghu Shree ]

18 years ago

Web Component Certification (OCEJWCD)

Help needed...Package does not exist

Hi,
Do u have BeerExpert java file in com.example.model.

18 years ago

Web Component Certification (OCEJWCD)

SCJP help

Hi,
In SCJP exam, they provides how many correct answer from the listed answers. for example, choose any two or choose one like this.

18 years ago

Programmer Certification (OCPJP)

Implicit promotion for constructor arguments

Hi,

int value 3 is converted into float. So Math(3) is executed. For more information about casting refer this link.

http://www.javaranch.com/maha/Resources/CarlsNotes.txt

18 years ago

Programmer Certification (OCPJP)

jstl ..c:set

Hi,
To sort out the propbelm remove all jstl tags except the follwing.
<%
String name="neeraj";
pageContext.setAttribute("name1",name);
%>
name1:<c

ut value="${name1}" />
<br>

If the error agin occurs give me your whole jsp file.

18 years ago

JSP

jstl ..c:set

Hi,
Try like this
<%
String strCity="XYZ";
pageContext.setAttribute( "city", strCity);
%>

then

<c:set var="home" value="<%= strCity %>" scope="session"/>

(or)

<c:set var="home" value="${strCity}" scope="session"/>

Hope this will helps you.

18 years ago

JSP

jstl ..c:set

Hi,

Using <c:set> we can store values and object and also in different scope.
some examples,
<c:set var="place" value="Chennai"/>
<c:set var="name1" value="value1" scope="page" />
<c:set var="com_mycompany_name2" value="value2" scope="request" />
<c:set var="com_mycompany_name3" value="value3" scope="session" />
<c:set var="com_mycompany_name4" value="value4" scope="application" />
[ October 19, 2005: Message edited by: Raghu Shree ]

18 years ago

JSP