Our Learnings

String and StringBuffer Implementation - which is fast

2011-06-30T16:30:00.000+05:30

All, I came across some interesting fact on String and String Buffer. We know that String concatination internaly uses StringBuffer to do the concatination operation, and thinking about this we do concatination as mentioned below: String str=a+b; a and b is string objects. java compiler compiles above code in this fashion:

How to identify the YUI version

2011-06-30T16:24:00.000+05:30

Hi all, Steps for identifying YUI version: Open the YUIInclude.js (or respective YUI related JS you have used). Search for the string ‘YAHOO.register(’. This is a JS function where you pass the version number. Check its arguments for your YUI version. NOTE: If you are using YUI version less than 2.8, please upgrade it to 2.8. This will not require any code changes other

Java J2EE Interview Questions and Answers - Part 7

2011-04-07T10:45:00.001+05:30

What is connection pooling?- With servlets, opening a database connection is a major bottleneck because we are creating and tearing down a new connection for every page request and the time taken to create connection will be more. Creating a connection pool is an ideal approach for a complicated servlet. With a connection pool, we can duplicate only the resources we

Java J2EE Interview Questions and Answers - Part 6

2011-04-07T10:45:00.000+05:30

What are the types of statements in JDBC?- Statement: to be used createStatement() method for executing single SQL statement PreparedStatement — To be used preparedStatement() method for executing same SQL statement over and over. CallableStatement — To be used prepareCall() method for multiple SQL statements over and over. What is stored procedure?- Stored procedure is

Java J2EE Interview Questions and Answers - Part 5

2011-04-04T23:23:00.001+05:30

Which containers use a Border layout as their default layout?- Window, Frame and Dialog classes use a BorderLayout as their layout. Which containers use a Flow layout as their default layout?- Panel and Applet classes use the FlowLayout as their default layout. What are wrapper classes?- Wrapper classes are classes that allow primitive types to be accessed as

Java J2EE Interview Questions and Answers - Part 4

2011-04-04T23:21:00.001+05:30

What is an applet?- Applet is a dynamic and interactive program that runs inside a web page displayed by a java capable browser. What is the difference between applications and applets?- a)Application must be run on local machine whereas applet needs no explicit installation on local machine. b)Application must be run explicitly within a java-compatible virtual machine

Java J2EE Interview Questions and Answers - Part 3

2011-04-03T20:04:00.001+05:30

What is a cloneable interface and how many methods does it contain?- It is not having any method because it is a TAGGED or MARKER interface. What is the difference between abstract class and interface?- a) All the methods declared inside an interface are abstract whereas abstract class must have at least one abstract method and others may be concrete or

Java J2EE Interview Questions and Answers - Part 2

2011-04-03T19:45:00.001+05:30

What is Garbage Collection and how to call it explicitly?- When an object is no longer referred to by any variable, java automatically reclaims memory used by that object. This is known as garbage collection. System. gc() method may be used to call it explicitly. What is finalize() method?- finalize () method is used just before an object is destroyed and can be called

Java J2EE Interview Questions and Answers - Part 1

2011-04-03T19:24:00.000+05:30

What is the difference between procedural and object-oriented programs?- a) In procedural program, programming logic follows certain procedures and the instructions are executed one after another. In OOP program, unit of program is object, which is nothing but combination of data and code. b) In procedural program, data is exposed to the whole program whereas in OOPs

Auto alignment of Multiple Divs (Assigning Multiple Divs using CSS)

2010-09-19T16:17:00.001+05:30

A very frequently asked question is how to align Multiple DIV’s using CSS. Here’s how to align multiple DIV’s. For simplicity sake, I will be aligning 10 divs in JSP. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Aligning Multiple DIV's using

I will be the great Contributor

2010-09-06T20:57:00.002+05:30

Thanks for inviting me to this blog.for sharing my thoughts and getting the knowledge from others.. I am happy to join in this blog.

Freewares/ Free Softwares 13 May 2010

2010-05-17T16:20:00.001+05:30

STOPzilla! STOPzilla! is anti-spyware Solution. It can detect, block, and quarantine Spyware and Adware in real time.Its features include: On-demand & automatic Spyware scanning; Updates automatically for optimal protection; Pop-up protection - intercepts and destroys all forms of Pop-ups while letting user-requested to Popup; Kills Browser Hijackers, removes rootkits, prevents botnet

Freeware / Free Software 08 Apr 2010

2010-04-15T08:39:00.001+05:30

FlipAlbum FlipAlbum Standard with a with a natural and intuitive interface is a digital photo album utility to organize your digital images, better. Easy to use, yet highly customizable, FlipAlbum can automatically create realistic, book-like albums. The features include - Auto Flip function; Auto Slide Show - present the contents of your book as a slide show with auto-play. The slide

parseInt('08') and parseInt('09') does not work in javascript

2010-03-18T18:37:00.001+05:30

Few of you might know this logic before. We would like to just let everyone know the lessons learnt from our team. When we were looking into an issue reported by customers on a date being passed wrongly even though when we key in a correct date, we figured out that parseInt(‘08’) and parseInt(‘09’) will give you a wrong value in javascript. This is because when you say parseInt (string

How to check what are the HTTP and HTTPS port in WPS from logs and Admin console

2010-03-01T15:59:00.002+05:30

Hi,There would be some case, where we dont have access to the admin console, but have only access to the logs. In this case how can we find the HTTP and HTTPS port for default and admin.To find the ports using Admin Console:start the server, go to Servers->Application servers > server1 > Ports, scroll down to see the screenshot belowWC admin host: HTTP port for admin consoleWC admin host secure:

Invoking PeS through plain Java

2010-03-01T15:56:00.001+05:30

Hi All, Today I would like to explain the POC that I was trying last week. Generally for connecting to PeS we have three ways as below File Layout Web Services Application Messaging Component Interface File Layout: This is used to connect to PeS when we need file based polling integration. Generally the type of file used would be xml or csv’s. This method is still very popularly used

Use of Indexes in Foreign Key

2009-11-24T18:47:00.003+05:30

Normally we used to avoid creating indexes in the foreign keys, with unindexed foreign key columns; Oracle will lock the child table WHEN TO INDEX: In addition to the table lock issue that might hit you, an unindexed foreign keyis bad in the following cases as well: à When you have an on delete cascade and have not indexed the child table. For example EMP is child of DEPT.

SQL DBO SQL Server Database Object Owner dbo

2009-11-23T19:02:00.000+05:30

Who is "dbo”? There are two "dbo" in SQL Server, one is Database Owner and one is Database Object Owner, dbo is a user with permissions to perform all activities in a database. Each database has this special user called dbo, user dbo cannot be deleted and is always present in every database. Database owners and object owners have no separate logins the user dbo is part of sysadmin fixed role

Introduction about SLD, Integration Builder and SC

2009-09-22T18:30:00.010+05:30

Session 2: Intro about SLD, Integration Builder and SCAs we know we will have different type of environments in corporate like development, QA and production. So we will have SAP in bunch of servers for each environment which is known as SLD (system landscape directory). The different client codes in each environment represent sub systems in it. For ex: one Dev system may be there which has 100

Easy start steps for developing a Blackberry application.

2009-09-18T19:36:00.001+05:30

1. Download the development tool and install it You can download the JDE which is provided by RIM to develop Blackberry applications. The other option is the eclipse plug in which can also be used to develop Blackberry applications. 2. Open the JDE and create a new workspace. 3. Create a new project in this workspace. 4. Now you can add classes to this project and build the application by

Blackberry device, Blackberry Enterprise Server and the Network Operation Center of RIM

2009-09-18T19:22:00.000+05:30

Blackberry Enterprise Server and the Network Operation Center of RIM Here I have given little information about the Blackberry device, Blackberry Enterprise server and the Network Operation Center of Research In Motion. We know that a blackberry device when configured with the intranet network of an organization can receive emails being pushed from the intranet mail server. The push option

Brief introduction on R/3 System and NetWeaver

2009-09-17T19:24:00.001+05:30

Session 1: Brief introduction on R/3 System and NetWeaver SAP (Systems, Applications and Products in Data Processing) is basically an ERP system. SAP R/3 is three-tier Architecture with Presentation, Business and Data logic. They are written in ABAP programming language and it uses Open SQL for connecting to data logic. We have some other ERP systems like JDEdwards, Oracle Fusion,

How to replace selected textarea value using javascript

2009-09-03T11:51:00.000+05:30

1. // code for IE2. var textarea = document.getElementById("textarea");3. 4. if (document.selection)5. {6. textarea.focus();7. var sel = document.selection.createRange();8. // alert the selected text in textarea9. alert(sel.text);10. 11. // Finally replace the value of the selected text with this new replacement one12. sel.text = '<b>' + sel.text + '</b>';13. }14. 15. 16. 17. // code for

Regarding OutOfMemoryError: PermGen space

2009-08-20T15:08:00.001+05:30

Every time we make a new build and redeploy it in JBOSS and after a few such redeployments it throws the below error java.lang.OutOfMemoryError: PermGen And we need to restart JBOSS. Excerpt from links: In Sun JVM, garbage-collection of Java Heap is managed in generations (memory segments holding objects of different ages- Young Generation, Tenured Generation and Permanent

Managing Windows XP Services locally/remotely using Service Controller Command SC

2009-07-23T16:01:00.001+05:30

General Starting and Stopping the service can be accomplished using the net stop <service name> net start <service name> A full list of the exact services is found in the registry (run regedit.exe) under the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services key. Alternatively, you can perform the stop and start using the name that is showed in the Services Control Panel applet by