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  Java Polymorphism and Overriding Methods

Most Java developers will be familiar with polymorphism – we’ve all seen the example of the Dog and Cat classes inheriting from some abstract Animal class and having their say() methods produce different results. But it’s still worthwhile to look at a few simple examples to reinforce the concepts.First, we define a simple class with one instance method and one static method.public class A { public String getName() { return "I am A"; } pu...

2,075 0          JAVA POLYMORPHISM DEMO OVERRIDING DYNAMI


  Setting server timezone

To set your web servers date timezone, for example for Eastern Standard Time (EST) use the following code:SetEnv TZ America/IndianapolisFor example, for Los Angeles time (Pacific time), use the following code:SetEnv TZ America/Los_AngelesOther location examples include:America/New_York - Eastern Time America/Detroit - Eastern Time - Michigan (most locations) America/Louisville - Eastern Time (Louisville, Kentucky) America/Indianapolis - Eastern Standard Time (Indiana, most locatio...

1,548 0          SERVER CHANGE .HTACCESS TIME ZONE


  Disable directory listings

Preventing directory listings can be very useful if for example, you have a directory containing important '.zip' archive files or to prevent viewing of your image directories. Alternatively it can also be useful to enable directory listings if they are not available on your server, for example if you wish to display directory listings of your important '.zip' files.To prevent directory listings, create a .htaccess file following the main instructions and guidance which includes the following te...

1,664 0          .HTACCESS DISABLE DIRECTORY LISTING INDE


  Using an Image Submit Button within an HTML Web Page Form

If you're using an HTML form on your web site and would like to use an image submit button instead of the boring standard submit button, this HTML code is for you.In order for your form's input box and your image submit button to line up properly, you will need to place it within an HTML table. In addition, unless your image has a transparent background, you will need to set the table background color to the same color as the image background so that it will seamlessly b...

1,835 0          HTML SUBMIT BUTTON IMAGE


  List of Web Safe Fonts

Here is the list of websafe fonts that I use in my own personal web development. Websafe (or "web safe", "safe for the web") fonts are supposedly fonts that are common among all versions of Windows, Mac, Linux, etc. Fonts that you expect everyone viewing your webpage to have. Please contact me if you know of any other web-safe fonts that should be added to this list. These font names are in typical font-family CSS format, in other words (first choice font), (second choice fon...

2,610 0          WEB CSS FONT SAFE FONT FONT LIST FONT FA


  Multiple Constructor in PHP

See code:class MultipleConstructor {private $info = ”;function __construct() {$argv = func_get_args();switch( func_num_args() ){default:case 1:self::__construct1($argv[0]);break;case 2:self::__construct2( $argv[0], $argv[1] );break;}}function __construct1($value) {$this->info = $value;}function __construct2($value, $value2) {$this->info = $value . ” ” . $value2;}function get() {return $this->info;}}$a = new MultipleConstructor(‘Value 1′);echo $a->get();$b = new MultipleCons...

7,674 0          PHP CONSTRUCTOR MULTIPLE CONSTRUCTOR


  PHP Security

1. IntroductionWriting PHP applications is pretty easy. Most people grasp the syntax rather quickly and will within short time be able to produce a script that works using tutorials, references, books, and help forum forums like the one we have here at PHP Freaks. The problem is that most people forget one of the most important aspects that one must consider when writing PHP applications. Many beginners forget the security aspect of PHP. Generally, your users are nice people, they will...

29,833 0          PHP SECURITY SQL INJECTION XSS CROSS SIT


  PHP Query String

Query string plays important role in building web applications, especially if you want to make nice urls without question mark and many key, value pairs, actually it is not so easy to design application with nice urls however it is always worth doing so, because it not only looks very proffessional, such URLs are search engine friendly, which means that they will get indexed faster but also it happens that search engines have problems with indexing pages with more then 3 key=value pairs in query...

3,397 0          PHP SECURITY QUERY STRING REQUEST