Showing posts with label Java. Show all posts

Education enhances one's knowledge and as the saying goes; Knowledge is Power. However, power that a person posses will be dependent on how an individual uses it. A person could ultimately choose to use knowledge and power for the benefit of themselves, for others or to be simply used in the destruction of mankind. Education is the knowledge of putting one's potentials to maximum use. Education makes man a right thinker. It tells man how to think and how to make decision.

This is where the education should be given importance. As education is geared towards individual development, such development should eventually transform into social development. For individuals and nations, it is key to creating, applying, and spreading knowledge-and thus to the development of dynamic, globally competitive economies.

It is one important policy that a state must promote, as education is the only means to understand its history, culture and to some extent their religion. Education is the only means to unite a country, a people as nation. This is to say that education is a must if a nation aspires to achieve growth and development and more importantly sustain it. The importance of education cannot be neglected by any nation. And in today's world, the role of education has become even more vital. It is an absolute necessity for economic and social development of any nation.

Did you know- How google used to rank your blog !!!… Well as for as i know you all might me aware of this feature of Google. Yes you are right- I am gonna share you about a little bit of my reserch on a tool of Google that’s being very popular now a days. That is “Google Blog Search” with this tool we can search the blogs listed in google. If you are getting a high traffic on your blogs, no doubt this will be very profitable for you. But what are the basic factors does Google take into account to elaborate the search results, as for as i know Google used to work on some techniques about the positive and negative factors affecting blog ranking, check it out:—

Positive Factors:

* Popularity of the blog (RSS subscriptions)
* Implied popularity (how many clicks search results get)
* Inclusion in blogrolls
* Inclusion in “high quality” blogrolls
* Tagging of posts (also from users)
* References to the blog by Resource.
* Page rank of Blog.

Negative Factors:

* Predictable frequency of posts (short bursts of posts might indicate spam)
* Content of the blog does not match content of the feed
* Content includes spam keywords
* Duplicated content
* Posts have all the same size
* Link distribution of the blog.
* Posts primarily link to one page or site.

It is no magic that you can get the information you want on the web. It will be free, if you want it to:

1. Search for your subjects. You will be landed on some websites.

2. Read the web page, if the information that you need is given enough or you want more information. Normally the free information websites only provide you with some general information.

3. If not, click on the underlined keyword on the page. Normally, you be sent to the sales page of the products matching the subject you searched in details. If you really like it then buy it. If you only want to get that information free then go to 4.

4. Go back to the previous website. Check all the ads appearing on the web page, select the one that shows exact or similar information that you searched for. If you find the information that you want, you have 2 choices. Buy it or look for the keywords of the web page, the words that appear many times in the web page or the headline.

5. Search the keywords on search engines until you are totally satisfied for information gathered or repeat step 1 again. Sooner or later you will find what you wanted.

The general reasoning behind people or companies still wanting or attempting to use meta tags is: "Meta tags will make all the difference for our web site" or "We have heard or read of companies that their web sites were placed way on top because of meta tags". Our response to such statements is, four or five years ago, it could have been true somewhat, even if some people don't exactly agree on that statement.

At the beginning of the Internet, meta tags were originally incorporated in a site as an attempt to better assist webmasters. They were also included to help search engines discover what their site was all about. Well, as one might expect, it didn't take very long that some people found a way to short-circuit the system as it were.

Some actually tried and successfully got around in abusing this technique by writing useless keywords into their meta tags in hopes to trick the search engines to rank them higher. Today, and because of all this abuse, most major search engines, especially Google, are placing less and less importance in the presence or absence of meta tags and their content.

1. Make sure you update all of the pages on your site frequently. Unchanged sites can be dropped by some sites and nobody wants to go onto a site and see something last updated in 2005 do they? It could be a good idea also to put a last updated counter so it shows to people you update it a lot so they will check back.

2. Allow customers and visitors to your site to be able to sign up for discounts and special offers. Put a form on your site to allow them to be able to sign up for a weekly, fortnightly or even monthly newsletter which they may be interested in.

3. Add a link to allow people to add your site to their favorites or send this to a friend, it will remind people about your site when they take a look in their bookmarks and think “Oh look, I wonder if this site has any updates”

4. Make sure that your site is easy to find if people forget the address. I have wanted to visit a website but could never find it. The best thing to do is put links so users can add your site to social bookmarking sites, so even if their computer dies they will be able to find their way back.

5. Never spam anybody who has signed up for a newsletter. If people no longer wish to receive these then make sure you do take them off the mailing list. This makes you look respectful and that you are not a cowboy who will just spam peoples’ in boxes to try and sell their product or get the odd page view.

6. Make a “Whats New?” section. People will instantly go to this to take a look at what has recently been updating and following on from earlier they will like a site that is always updated and will probably come back to take a look at what is new and what has been updated.

Q:How can I write a program that takes command line input?

A:Java programs that take input from the command line declare a special static method called main, which takes a String array as an argument and returns void। The example program below loops through any arguments passed to the program on the command line and lists their values. More details available to subscribers:How can I write a program that takes command line input?

Q: What does public static void main(String[]) mean?

A: This is a special static method signature that is used to run Java programs from a command line interface (CLI)। There is nothing special about the method itself, it is a standard Java method, but the Java interpreter is designed to call this method when a class reference is given on the command line, as below. More details available to subscribers:What does public static void main(String[]) mean?

Q: Why are command line arguments passed as a String?

A: Command line arguments are passed to the application's main method by the Java runtime system before the application class or any supporting objects are instantiated। It would be much more complex to define and construct arbitrary object types to pass to the main method and primitive values alone are not versatile enough to provide the range of input data that strings can. String arguments can be parsed for primitive values and can also be used for arbitrary text input, file and URL references.

Q: Why doesn't the main method throw an error with no arguments?

A: When you invoke the Java Virtual Machine on a class without any arguments, the class' main method receives a String array of zero length। Thus, the method signature is fulfilled. Provided the main method does not make any reference to elements in the array, or checks the array length before doing so, no exception will occur.

Q: Why do we only use the main method to start a program?

A: The entry point method main is used to the provide a standard convention for starting Java programs। The choice of the method name is somewhat arbitrary, but is partly designed to avoid clashes with the Thread start() and Runnable run() methods, for example.

Q: Can the main method be overloaded?

A: Yes, any Java method can be overloaded, provided there is no final method with the same signature already। The Java interpreter will only invoke the standard entry point signature for the main method, with a string array argument, but your application can call its own main method as required. Main method modifiers Q: Can the main method be declared final? A: Yes, the static void main(String[]) method can be declared final.

Q: I get an exception if I remove the static modifier from main!

A: The static void main(String[]) method is a basic convention of the Java programming language that provides an entry point into the runtime system। The main method must be declared static because no objects exist when you first invoke the Java Virtual Machine (JVM), so there are no references to instance methods. The JVM creates the initial runtime environment in which this static method can be called, if you remove the static modifier, it will throw a NoSuchMethodException. Application start up

Q: What is threaded programming and when is it used?

A: Threaded programming is normally used when a program is required to do more than one task at the same time। Threading is often used in applications with graphical user interfaces; a new thread may be created to do some processor-intensive work while the main thread keeps the interface responsive to human interaction. The Java programming language has threaded programming facilities built in, so it is relatively easy to create threaded programs. However, multi-threaded programs introduce a degree of complexity that is not justified for most simple command line applications.

Q: Why are wait(), notify() and notifyall() methods defined in the Object class?

A: These methods are detailed on the Java Software Development Kit JavaDoc page for the Object class, they are to implement threaded programming for all subclasses of Object.

Q: Why are there separate wait and sleep methods?

A: The static Thread।sleep(long) method maintains control of thread execution but delays the next action until the sleep time expires। The wait method gives up control over thread execution indefinitely so that other threads can run. More details available to subscribers:Why are there separate wait and sleep methods? Threads and runnable types

Q: What's the difference between Thread and Runnable types?

A: A Java Thread controls the main path of execution in an application। When you invoke the Java Virtual Machine with the java command, it creates an implicit thread in which to execute the main method. The Thread class provides a mechanism for the first thread to start-up other threads to run in parallel with it. The Runnable interface defines a type of class that can be run by a thread. The only method it requires is run, which makes the interface very easy to to fulfil by extending existing classes. A runnable class may have custom constructors and any number of other methods for configuration and manipulation.