By default there is no permission to login as ROOT in Ubuntu, because of the security reasons. But you can be able to reset those setting by editing the configuration files. So try the following tip to enable the ROOT User login. 
Here the gdm stands for Gnome Display Manager. Continue reading
05
Mar
10
05
Mar
10
In any Object oriented programming language , one object reference can be type cast into another object reference.
There are compile-time rules and runtime rules for casting in java
There can be 2 casting java scenarios ·
Upcasting
Downcasting
When we cast a reference along the class hierarchy in a direction from the root class towards the children or subclasses, it is a downcast. When we cast a reference along the class hierarchy in a direction from the sub classes towards the root, it is an upcast. Continue reading
02
Mar
10
Recently I had some study about the PHP. It is my favorite language from C. 
I really want to know what exactly happening inside the PHP. Ok, here are the information. As you know the PHP is written in C. The PHP’s core contains two parts, the first and lowest level is the Zend Engine and the second is the PHP Core.
The Zend Engine:
It handles parsing a human-readable script into machine-readable tokens, and then executing those tokens within a process space. ZE also handles memory management, variable scope, and dispatching function calls. Continue reading
02
Mar
10
This tutorial will guide you create a simple popup based on CSS and Javascript
1. Create a simple div
HTML
<div id="overlayContent" style="display:none;z-index:110;width:100%;position:absolute;left:0;top:25;height:200px;"> </div>
here , make sure you put z-index to a value , display to none and position as absoulte. Continue reading
20
Feb
10
Qt have the language binding option so we can bind PHP also, in PHP 5 the OOP’s concept make it
easy you to write such an application like Calculator, System Tay. You can downloadPHP-Qt from here.
