Free Tutorial

Designing a gaming system

2009-11-13T00:02:00.000-08:00

1. Designing a gaming system
* What objects are required in a gaming system?
* How will they interact?
2. Implementing a simple gaming system object model
* Creating a location object
* Creating an exit object
* Putting it all together
3. NEW Object Persistence - Saving a game's state
* Designing a gaming world
* Creating a gaming world
* Persistence Demonstration

Tutorial Visual J++ Users

2009-11-12T23:57:00.000-08:00

If you wish to use any source code from the tutorials in your projects, you'll need to import the files into your project first. Also remember that Visual J++ 1.1 isn't JDK1.1 compatible - you'll need to upgrade your Microsoft Java Virtual Machine first. See http://www.microsoft.com/java/ for more information.

First PHP Function

2009-10-15T23:51:00.000-07:00

When you create a function, you first need to give it a name, like myCompanyMotto. It's with this function name that you will be able to call upon your function, so make it easy to type and understand.

The actual syntax for creating a function is pretty self-explanatory, but you can be the judge of that. First, you must tell PHP that you want to create a function. You do this by typing the keyword function followed by your function name and some other stuff (which we'll talk about later).

Here is how you would make a function called myCompanyMotto. Note: We still have to fill in the code for myCompanyMotto.

Build a Slide Show from template Power Point Tutorial

2009-07-31T01:07:00.000-07:00

Open PowerPoint either from the Start Menu or from a shortcut if it is available. The PowerPoint window will open and smaller window will also appear with the following options:

1. Create a new presentation using a Wizard - this is the easiest way to make a presentation but I am not going to cover it.
2. Create a new presentation using a Template - which is the choice we will start with.
3. Create a blank presentation - which we will look at later.
4. Open an existing presentation.

Choose the template option. A new window will open offering a sample of prepared slides with some decorations and font choices ready to use. Use your arrow keys to scroll through the templates and choose one you like.

Choosing a Layout

Next, a window opens asking what kind of layout you want. As you can see there are many layouts to choose from including ones with pictures, charts, tables and more. We will choose the very first layout called "Title Page". Don't feel inhibited by the lack of a layout that suits your sense of design. You can pick one that is close and modify it, add to it, or subtract from it. Or, you can start from scratch.

Create a cool fading 3d trail on your text On Firework

2009-07-30T23:35:00.000-07:00

Step 1 : Type the required text on the canvas. You can use same or different colour for each character in the text. But one ting you should remember that if you use different colour the final effect is eye-catching
Step 2: Convert the text to a Bitmap image by clicking on Modify>Convert to Bitmap.
Step 3: Motion trail tab is directly available in fireworks. For doing this select the text and click on Filters >Eye Candy >Motion Trail. The Motion Trail window will appears
Step 4: You can change the direrction clicking on the point in the circular image. By this way you can adjusts the position of the trail. By looking at the final effect in the preview screen at the right side of the window select a suitable position for the trail.
Step 5: TTo adjust the length of the Trail, click on the small triangle below the bar. It is better you select a small trail that suits you text and also it depends on the type of design for which you are creating this effect. Then adjust the tapering width and the transparency of the trail. Transparency can be adjusted by changing the opacity66he transparency of the trail. Transparency can be adjusted by changing the opacity
Step 6: Then smear the colors from Edges by pulling the trail from the edge of the text.

Partitioning Hard Disk Computer

2009-06-29T22:15:00.000-07:00

Now you should place an installation or boot disk into the floppy drive and restart the computer. When you are prompted with the A:\> type fdisk and press enter. In FDISK you are setting the partition information which is one of the most confusing part of the setup process. In FDISK you will want to select [4] Display partition information, if you see a partition present and with the right size then you will exit and proceed to the format process. If no partition is present then you will want to create one by going to the main window and choosing [1] create primary partition, this will ask you a few questions about the size but you should just keep on saying yes to all of them. I will explain the other options in further discussion but for now you should exit and restart with the disk still in the drive when the process is completed.

Tutorial For BIOS SETUP

2009-06-29T22:04:00.000-07:00

Restart you computer and when you see the numbers in the top left of your screen incrementing you will want to look in the lower left side which will display "Press ??? To Enter Setup". Where the ??? will be the key that you will press to enter setup, Phoenix BIOS requires you to press F2 while Award requires the Del key. There is a saying in this field "the only consistent things with computers is inconsistency".
Once you have entered setup you will have to locate the hard disk setup screen, sometimes it is under "Auto detect Hard Disk" and sometimes it is on the screen when you first enter setup. If the computer does not support Auto Detect then you will have to enter the settings manually by doing the following.
[1] Set the IDE Adapter mode to Auto
[2] Enter the heads, cylinders, and tracks
[3] If the option available you must set the mode to LBA
[4] Save the changes and exit

Format Hardisk and Install Windows Tutorial

2009-06-29T18:39:00.000-07:00

All computers
should have a C:. When computers were first being made the operating system was refered to as MS_Dos. Now with windows systems you have to go into the start menu to find it. It is now labeled as command prompt in the accesories part of the menu. Or if you do not have an operating system it should come up automatically. Now depending on the operating system you are wanting to install you may or may not have to do this. At the C:> prompt you would type the following: format c:*.*

that will erase the entire hard drive of the computer then you can install your windows operating disk into the cd-rom drive and it will guide you through installation.

PHP pages Tutorial

2009-05-31T22:23:00.000-07:00

The appearance of an PHP page depends on who or what is viewing it. To the Web browser that receives it, an Active Server Page looks just like a normal HTML page. If a visitor to your Web site views the source code of an PHP page, that's what they see: a normal HTML page. However, the file located in the server looks very different. In addition to text and HTML tags, you also see server-side scripts. This is what the PHP page looks like to the Web server before it is processed and sent in response to a request.
What Do PHP pages Look Like?
Server-side scripts look a lot like HTML tags. However, instead of starting and ending with lesser-than ( < ) and greater-than ( > ) brackets, they typically start with . The is called a closing tag. In between these tags are the server-side scripts. You can insert server-side scripts anywhere in your Web page--even inside HTML tags.

The rules on java constructors

2009-05-16T09:57:00.000-07:00

These are some of the rules on constructors:

* private constructors()- keyword used "private", no one can instantiate the class as object. But can still expose public static methods, and these methods can construct object and return it, but no one else can do this.
* package constructors() - None of them outside your package can construct an instance of your class. This is useful when you want to have classes in your package which can do new yourClass() and don't want to let anyone else to do this.
* protected constructors() - keyword used "protected" only the subclasses of your class can make use of this package.
* public constructors() - keyword used "public" the generic constructor will use these.

Superglobal variables

2009-04-21T06:20:00.000-07:00

Again, superglobal variables are predefined arrays, including $_POST and $_GET and are accessible from anywhere on the page. The complete list of superglobals is shown below.

* $_GET - variables passed into a page on the query string.
* $_POST - variables passed into a page through a form using the post method.
* $_SERVER - server environment variables (e.g, $_SERVER['HTTP_REFERER'] returns the URL of the referring page).
* $_COOKIE - cookie variables.
* $_FILES - variables containing information about uploaded files.
* $_ENV - PHP environment variables (e.g, $_ENV['HTTP_HOST'] returns the name of the host server. (see footnote)
* $_REQUEST - variables passed into a page through forms, the query string and cookies.
* $_SESSION - session variables.

PHP MySQL Functions

2009-04-21T04:20:00.000-07:00

Function	Description	PHP
mysql_affected_rows()	Returns the number of affected rows in the previous MySQL operation	3
mysql_change_user()	Deprecated. Changes the user of the current MySQL connection	3
mysql_client_encoding()	Returns the name of the character set for the current connection	4
mysql_close()	Closes a non-persistent MySQL connection	3
mysql_connect()	Opens a non-persistent MySQL connection	3
mysql_create_db()	Deprecated. Creates a new MySQL database. Use mysql_query() instead	3
mysql_data_seek()	Moves the record pointer	3
mysql_db_name()	Returns a database name from a call to mysql_list_dbs()	3
mysql_db_query()	Deprecated. Sends a MySQL query. Use mysql_select_db() and mysql_query() instead	3
mysql_drop_db()	Deprecated. Deletes a MySQL database. Use mysql_query() instead	3
mysql_errno()	Returns the error number of the last MySQL operation	3
mysql_error()	Returns the error description of the last MySQL operation	3
mysql_escape_string()	Deprecated. Escapes a string for use in a mysql_query. Use mysql_real_escape_string() instead	4
mysql_fetch_array()	Returns a row from a recordset as an associative array and/or a numeric array	3
mysql_fetch_assoc()	Returns a row from a recordset as an associative array	4
mysql_fetch_field()	Returns column info from a recordset as an object	3
mysql_fetch_lengths()	Returns the length of the contents of each field in a result row	3
mysql_fetch_object()	Returns a row from a recordset as an object	3
mysql_fetch_row()	Returns a row from a recordset as a numeric array	3
mysql_field_flags()	Returns the flags associated with a field in a recordset	3
mysql_field_len()	Returns the maximum length of a field in a recordset	3
mysql_field_name()	Returns the name of a field in a recordset	3
mysql_field_seek()	Moves the result pointer to a specified field	3
mysql_field_table()	Returns the name of the table the specified field is in	3
mysql_field_type()	Returns the type of a field in a recordset	3
mysql_free_result()	Free result memory	3
mysql_get_client_info()	Returns MySQL client info	4
mysql_get_host_info()	Returns MySQL host info	4
mysql_get_proto_info()	Returns MySQL protocol info	4
mysql_get_server_info()	Returns MySQL server info	4
mysql_info()	Returns information about the last query	4
mysql_insert_id()	Returns the AUTO_INCREMENT ID generated from the previous INSERT operation	3
mysql_list_dbs()	Lists available databases on a MySQL server	3
mysql_list_fields()	Deprecated. Lists MySQL table fields. Use mysql_query() instead	3
mysql_list_processes()	Lists MySQL processes	4
mysql_list_tables()	Deprecated. Lists tables in a MySQL database. Use mysql_query() instead	3
mysql_num_fields()	Returns the number of fields in a recordset	3
mysql_num_rows()	Returns the number of rows in a recordset	3
mysql_pconnect()	Opens a persistent MySQL connection	3
mysql_ping()	Pings a server connection or reconnects if there is no connection	4
mysql_query()	Executes a query on a MySQL database	3
mysql_real_escape_string()	Escapes a string for use in SQL statements	4
mysql_result()	Returns the value of a field in a recordset	3
mysql_select_db()	Sets the active MySQL database	3
mysql_stat()	Returns the current system status of the MySQL server	4
mysql_tablename()	Deprecated. Returns the table name of field. Use mysql_query() instead	3
mysql_thread_id()	Returns the current thread ID	4
mysql_unbuffered_query()	Executes a query on a MySQL database (without fetching / buffering the result)	4

Wireless LANs, or WLANs, use radio frequency (RF)

2009-03-15T02:55:00.000-07:00

This minimizes the need for wired connections. WLANs give users mobility as they allow connection to a local area network without having to be physically connected by a cable. This freedom means users can access shared resources without looking for a place to plug in cables, provided that their terminals are mobile and within the designated network coverage area. With mobility, WLANs give flexibility and increased productivity, appealing to both entrepreneurs and to home users. WLANs may also enable network administrators to connect devices that may be physically difficult to reach with a cable.

The Institute for Electrical and Electronic Engineers (IEEE) developed the 802.11 specification for wireless LAN technology. 802.11 specifies over-the-air interface between a wireless client and a base station, or between two wireless clients. WLAN 802.11 standards also have security protocols that were developed to provide the same level of security as that of a wired LAN.
The first of these protocols is Wired Equivalent Privacy (WEP). WEP provides security by encrypting data sent over radio waves from end point to end point.

The second WLAN security protocol is Wi-Fi Protected Access (WPA). WPA was developed as an upgrade to the security features of WEP. It works with existing products that are WEP-enabled but provides two key improvements: improved data encryption through the temporal key integrity protocol (TKIP) which scrambles the keys using a hashing algorithm. It has means for integrity-checking to ensure that keys have not been tampered with. WPA also provides user authentication with the extensible authentication protocol (EAP).

DNS stands for domain name system

2009-03-15T02:54:00.000-07:00

DNS translates (converts) the host name into the IP address and IP address into the host name. One thing is clear that the communication in a LAN private WAN or internet is based on the IP addresses. On internet every IP address is associated with the domain name let’s say assume that the IP address 120.1.1.1. is assigned to www.yahoo.com, 12.1.2.3 is assigned to www.google.com and 35.22.32.5 is assigned to www.msn.com and so on. Just imagine that how many IP addresses you can remember 1, 2, 5, 10, 50, 100 or 1000. IP addresses are actually difficult to remember and domain names are easy so every IP address on the internet is associated with a domain name.

TCP/IP stands for transmission

2009-03-15T02:50:00.000-07:00

Protocols are the set of rules, agree upon ways and communication standards that computer and devices use to communication with each other. TCP/IP stands for transmission control protocol/Internet protocol. TCP/IP is the standard protocol for network communication in LAN or WAN. All the devices and applications have to follow to same protocols to make network communication system.

Free Tutorial Security Network Configurations

2009-02-22T05:15:00.000-08:00

There are a few things to keep in mind when configuring your network boundaries (e.g., packet filtering routers and firewalls).

Sites should ensure that they carefully design their network topology so that effective traffic boundaries exist between systems that offer distinct levels of service. For instance, a site typically has an anonymous FTP service, web service, and an incoming electronic mail hub. The site uses good security practice by separating the machines that provide these external services from those that perform internal services. It is important to have strong network boundaries (preferably using firewalls) between these two sets of machines. In this way, even if an FTP server is vulnerable internal machines can be protected at the intervening network boundary.

For example, sites that have an FTP server that allows the PORT command to establish connections to third-party machines should block traffic between the FTP server and machines that offer services relying on hostname or IP address for authentication. Examples of such services are rlogin, rsh and NFS. While a firewall or filtering router should always prevent direct external access to such services, it should also filter traffic from an internal FTP server that behaves in this way. This prevents the FTP server being used as a relay machine to attack protocols with weak authentication mechanisms based on hostname or IP address.

Free Tutorial Microsoft Expression Web: Building Websites

2009-02-22T05:00:00.000-08:00

This class covers the basics for creating a website with Microsoft's Expression Web with features such as toolbars, formatting, page layouts and link creation. With this easy website creation software, you'll apply cascading style sheets, then learn how to create complex queries, how to configure the software for different browsers and how to create interactive web pages with ASP.NET 2.0 capabilities.

Lesson 1: The basics for creating a website
A website presence on the internet for your company is a necessity. This lesson introduces you to the Expression Web software, explains what is needed in a small business website design and helps you start the planning process for your site.

Lesson 2: Cascading style sheets examples
Creating elegant websites is no longer a chore now that cascading style sheets (CSS) are available. In this lesson, you'll learn how to work with Microsoft Expression Web software's CSS capabilities to create styles.

Lesson 3: How to build a web page with presence and accessibility
Accessibility, compatibility, query capabilities and data presentation are important aspects of a competitive, functioning website. Learn how to configure and manage Microsoft Expressions Web software to create, present and maintain meaningful content.

Lesson 4: Leveraging ASP.NET 2.0 to make your own website dynamic
In this final lesson, you'll learn how to work with ASP.NET to make your website an interactive, dynamic web application. We'll address controls, no-code date binding and master pages.

Website Design using Visual Studio 2005

2009-02-09T05:49:00.000-08:00

Whenever you've an living web site, you can cut this part. Differently, you can make a fresh internet site and page by followers this steps. To create a filing system Web site:

* Open up Visual Studio 2005.
* With the File computer menu, open New and click on internet site.
The fresh internet site panel appears.
* Below Visual Studio installed guides, click ASP.NET Web Site.
* In the locating box, enter the name of the folder where you would like to keep the pageboys of your internet site.
E.g., type the folder name C:\internet site*\mySite.
* In the words list, click Visual Basic (or the words you prefer to work with).
* Click OK.
Visual Web Developer makes the folder and afresh page called default on.aspx.

PHP Tutorial>Writing the Feedback Form

2009-01-20T02:13:00.000-08:00

The first thing we need to do is to write the feedback form itself. Put the following code in the body section of an HTML file named, say, feedback.html.



  Email: 

  Message:

  <br />

Basically the form asks the visitor for his email address (the field named "email" found in input name="email" above) and message (the field named "message" found in textarea name="message"), and presents him with a button which he can click to submit the contents of the form. When the form is submitted, it is "posted" (see the "method" attribute of the form tag) to a script named "sendmail.php" (also specified in the form tag).

PHP tutorial>The first PHP script

2009-01-20T02:12:00.000-08:00

The first PHP script you will be writing is very basic. All it will do is print out all the information about PHP on your server. Type the following code into your text editor:


phpinfo();
?>

As you can see this actually just one line of code. It is a standard PHP function called phpinfo which will tell the server to print out a standard table of information giving you information on the setup of the server.

One other thing you should notice in this example is th
at the line ends in a semicolon. This is very important. As with many other scripting and programming languages nearly all lines are ended with a semicolon and if you miss it out you will get an error.

PHP Tutorial>Why you should choose PHP

2009-01-20T01:24:00.000-08:00

You may be wondering why you should choose PHP over other languages such as Perl or even why you should learn a scripting language at all. I will deal with learning scripting languages first. Learning a scripting language, or even understanding one, can open up huge new possibilities for your website. Although you can download pre-made scripts from sites like Hotscripts, these will often contain advertising for the author or will not do exactly what you want. With an understanding of a scripting language you can easily edit these scripts to do what you want, or even create your own scripts.

Using scripts on your website allows you to add many new 'interactive' features like feedback forms, guestbooks, message boards, counters and even more advanced features like portal systems, content management, advertising managers etc. With these sort of things on your website you will find that it gives a more professional image. As well as this, anyone wanting to work in the site development industry will find that it is much easier to get a job if they know a scripting language.

Free Tutorial>Java's Evolution

2009-01-13T02:09:00.000-08:00

Java Origins: Embedded Systems (1991-1994)
Java (originally called Oak) was developed because Sun was having difficulty using C++ as part of a larger project. Java was designed to have a small footprint when it ran standalone in small machines and devices. The Java language was derived from C++ but without many of the cumbersome, difficult-to-use features of C++. Java's cross-platform capability originally addressed the problem that applications for embedded devices must run on a wide variety of hardware (without the benefit of a standardized operating system).
Java failed to capture the market in spite of a concerted push into Interactive TV. For a period, Java looked like another good technical idea that would fail comercially.

ava: A Client-side Wonder (1995-1997)

The Internet came on strong in 1995 but webpages did not have dynamic capability. Java soon looked like an ideal tool: it could run on the many operating systems of Internet-connected clients. Netscape licenced Java in mid-1995 for its browser. In a short period, many applets (which run inside a browser) were built and Java quickly gained popularity and acceptance.

Before long, Sun and others in the anti-Microsoft camp, saw a potential for Java beyond the browser (see Figure 1). The so-called network computer would be a simple device which could run Java applications on the client-side. The camp predicted that soon network computers would make the Windows operating system obsolete.

Java programming tutorials>Stroke Attributes

2009-01-13T00:45:00.000-08:00

Arguments to setStroke must implement the Stroke interface, and the BasicStroke class is the sole builtin class that implements Stroke. Here are the BasicStroke constructors:

* BasicStroke()
Creates a BasicStroke with a pen width of 1.0, the default cap style of CAP_SQUARE, and the default join style of JOIN_MITER. See the following examples of pen widths and cap/join styles.
* BasicStroke(float penWidth)
Uses the specified pen width and the default cap/join styles (CAP_SQUARE and JOIN_MITER).
* BasicStroke(float penWidth, int capStyle, int joinStyle)
Uses the specified pen width, cap style, and join style. The cap style can be one of CAP_SQUARE (make a square cap that extends past the end point by half the pen width -- this is the default), CAP_BUTT (cut off segment exactly at end point -- use this one for dashed lines), or CAP_ROUND (make a circular cap centered on the end point, with a diameter of the pen width). The join style can be one of JOIN_MITER (extend outside edges of lines until they meet -- this is the default), JOIN_BEVEL (connect outside corners of outlines with straight line), or JOIN_ROUND (round off corner with circle with diameter equal to the pen width).

# BasicStroke(float penWidth, int capStyle, int joinStyle, float miterLimit)
Same as above but you can limit how far up the miter join can go (default is 10.0). Stay away from this.
# BasicStroke(float penWidth, int capStyle, int joinStyle, float miterLimit, float[] dashPattern, float dashOffset)
Lets you make dashed lines by specifying an array of opaque (entries at even array indices) and transparent (odd indices) segments. The offset, which is often 0.0, specifies where to start in the dashing pattern.

Free Tutorial>Java Architecture

2008-12-24T06:51:00.000-08:00

The Java environment is composed of a number of system components. You use these components at compile time to create the Java program and at run time to execute the program. Java achieves its independence by creating programs designed to run on the Java Virtual Machine rather than any specific computer system.
· After you write a Java program, you use a compiler that reads the statements in the program and translates them into a machine independent format called bytecode.
· Bytecode files, which are very compact, are easily transported through a distributed system like the Internet.
· The compiled Java code (resulting byte code) will be executed at run time.
Java programs can be written and executed in two ways:

* Stand-alone application (A Java Swing Application)
* Applet which runs on a web browser (Example: Internet Explorer)

Free Tutorial>Java Arithmetic Operators

2008-12-24T06:40:00.000-08:00

The Java programming language has includes five simple arithmetic operators like are + (addition), - (subtraction), * (multiplication), / (division), and % (modulo). The following table summarizes the binary arithmetic operators in the Java programming language.
The relation operators in Java are: ==, !=, <, >, <=, and >=. The meanings of these operators are:
Use Returns true if
op1 + op2 op1 added to op2
op1 - op2 op2 subtracted from op1
op1 * op2 op1 multiplied with op2
op1 / op2 op1 divided by op2
op1 % op2 Computes the remainder of dividing op1 by op2

The following java program, ArithmeticProg , defines two integers and two double-precision floating-point numbers and uses the five arithmetic operators to perform different arithmetic operations. This program also uses + to concatenate strings. The arithmetic operations are shown in boldface.

public class ArithmeticProg {
 public static void main(String[] args) {

 //a few numbers
 int i = 10;
 int j = 20;
 double x = 10.5;
 double y = 20.5;

 //adding numbers
 System.out.println("Adding");
 System.out.println(" i + j = " + (i + j));
 System.out.println(" x + y = " + (x + y));

 //subtracting numbers
 System.out.println("Subtracting");
 System.out.println(" i - j = " + (i - j));
 System.out.println(" x - y = " + (x - y));

 //multiplying numbers
 System.out.println("Multiplying");
 System.out.println(" i * j = " + (i * j));
 System.out.println(" x * y = " + (x * y));

 //dividing numbers
 System.out.println("Dividing");
 System.out.println(" i / j = " + (i / j));
 System.out.println(" x / y = " + (x / y));

 //computing the remainder resulting
 //from dividing numbers
 System.out.println("Modulus");
 System.out.println(" i % j = " + (i % j));
 System.out.println(" x % y = " + (x % y));

   }
}