The Java Programming Language

Java - an island of Indonesia, a type of coffee, and a programming language. Three very different meanings, each in varying degrees of importance. Most programmers, though, are interested in the Java programming language. In just a few short years (since late 1995), Java has taken the software community by storm. Its phenomenal success has made Java the fastest growing programming language ever. There's plenty of hype about Java, and what it can do. Many programmers, and end-users, are confused about exactly what it is, and what Java offers.

Java is a revolutionary language

The properties that make Java so attractive are present in other programming languages. Many languages are ideally suited for certain types of applications, even more so than Java. But Java brings all these properties together, in one language. This is a revolutionary jump forward for the software industry.
Let's look at some of the properties in more detail: -

·         object-oriented

·         portable

·         multi-threaded

·         automatic garbage collection

·         secure

·         network and "Internet" aware

·         simplicity and ease-of-use

Object-oriented

Many older languages, like C and Pascal, were procedural languages. Procedures (also called functions) were blocks of code that were part of a module or application. Procedures passed parameters (primitive data types like integers, characters, strings, and floating point numbers). Code was treated separately to data. You had to pass around data structures, and procedures could easily modify their contents. This was a source of problems, as parts of a program could have unforeseen effects in other parts. Tracking down which procedure was at fault wasted a great deal of time and effort, particularly with large programs.
In some procedural language, you could even obtain the memory location of a data structure. Armed with this location, you could read and write to the data at a later time, or accidentally overwrite the contents.
Java is an object-oriented language. An object-oriented language deals with objects. Objects contain both data (member variables) and code (methods). Each object belongs to a particular class, which is a blueprint describing the member variables and methods an object offers. In Java, almost every variable is an object of some type or another - even strings. Object-oriented programming requires a different way of thinking, but is a better way to design software than procedural programming.

Portable

Most programming languages are designed for a specific operating system and processor architecture. When source code (the instructions that make up a program) are compiled, it is converted to machine code which can be executed only on one type of machine. This process produces native code, which is extremely fast.
Another type of language is one that is interpreted. Interpreted code is read by a software application (the interpreter), which performs the specified actions. Interpreted code often doesn't need to be compiled - it is translated as it is run. For this reason, interpreted code is quite slow, but often portable across different operating systems and processor architectures.

Multi-threaded

If you've ever written complex applications in C, or PERL, you'll probably have come across the concept of multiple processes before. An application can split itself into separate copies, which run concurrently. Each copy replicates code and data, resulting in increased memory consumption. Getting the copies to talk together can be complex, and frustrating. Creating each process involves a call to the operating system, which consumes extra CPU time as well.

Automatic garbage collection

No, we're not talking about taking out the trash (though a computer that could literally do that would be kind of neat). The term garbage collection refers to the reclamation of unused memory space. When applications create objects, the JVM allocates memory space for their storage. When the object is no longer needed (no reference to the object exists), the memory space can be reclaimed for later use.

Secure

Security is a big issue with Java. Since Java applets are downloaded remotely, and executed in a browser, security is of great concern. We wouldn't want applets reading our personal documents, deleting files, or causing mischief. At the API level, there are strong security restrictions on file and network access for applets, as well as support for digital signatures to verify the integrity of downloaded code.

Network and "Internet" aware

Java was designed to be "Internet" aware, and to support network programming. The Java API provides extensive network support, from sockets and IP addresses, to URLs and HTTP. It's extremely easy to write network applications in Java, and the code is completely portable between platforms. In languages like C/C++, the networking code must be re-written for different operating systems, and is usually more complex. The networking support of Java saves a lot of time, and effort.
Java also includes support for more exotic network programming, such as remote-method invocation (RMI), CORBA and Jini. These distributed systems technologies make Java an attractive choice for large distributed systems.

Simplicity and ease-of-use

Java draws its roots from the C++ language. C++ is widely used, and very popular. Yet it is regarded as a complex language, with features like multiple-inheritance, templates and pointers that are counter-productive. Java, on the other hand, is closer to a "pure" object-oriented language.

Summary

Java provides developers with many advantages. While most of these are present in other languages, Java combines all of these together into one language. The rapid growth of Java has been nothing short of phenomenal, and shows no signs (yet!) of slowing down. In next month's column, I'll talk more about the heart of Java - the Java Virtual Machine.

12 Pragmatic Things A Business Venture Can Do With Their Site

Commonly we talk in conceptual terms of what a site can improve the situation a business, for example, help incomes, increment deals and so forth. Be that as it may, that does not address the inquiry concerning.

1. Sell Items Online through an online index and shopping basket

This is the most immediate and gainful utilization of a site. Offer items on the web gather cash through Visa and different means and dispatch the merchandise to the purchaser. Obviously, not all organizations will have items or web designing courses in Bangalore administrations that can be sold on the web however regardless of whether you can't offer it online you can feature them on the site.

2. Customer Help Part

A site is an amazing touch point for client bolster cooperation. With instruments, for example, a web-based ticketing framework or online constant visit bolster, an organization Web Design Courses can give awesome help to its clients. Utilizing a static instrument, for example, an FAQ online will likewise help answer standard questions that can be raised by clients.

3. Workers Entrance where staff can communicate and be refreshed on organization news

A piece of your site committed to representatives with data, apparatuses, and refreshes for them is an incredible thought. You would password be able to ensure this framework requiring a login to keep away from security issues. Yet, this is an incredible device to stay with workers associated with the particularly in extensive or dispersed organizations where the correspondence isn't simple.

4. Give item/benefit data to download PDF/PPS designs

Post it online once - download it a million times. It's the most ideal approach to appropriate any data everywhere throughout the world. No compelling reason to send substantial documents everywhere through email. Simply send the connection (URL) of the record and anybody can download it. 5. Take Enrollment and Charges online for occasions or administrations through structures

5. Online structures can make life simple for any supervisor requiring enrollments for an occasion or an administration. The shape can be handled from numerous points of view where yield can be sent by email, can be put away in a database for classification or can trigger another arrangement of occasions. 6. Take memberships for bulletins to customers

6. I routinely buy into pamphlets of locales I find fascinating and my email customer has an envelope where all bulletins are arranged and put away to read at relaxation. An organization that needs to make mindfulness must take the inconvenience of setting up a decent bulletin framework and after that populating it with intriguing substance.

7. Give worker instruction substance, for example, preparing material and recordings

With the expanding steady loss and occupation bouncing, organizations are confronting an issue of preparing new hopefuls consistently. This implies printing huge amounts of preparing material, gathering them in classrooms and hours of addressing. Or on the other hand you can essentially put it on the web and guarantee the worker learns on his chance. Logging hours spent on the material can be effortlessly recorded and online tests can without much of a stretch test the learning. Progressively this is being utilized increasingly by organizations who need to pare down preparing costs.

8. Give client instruction data, for example, direction material and recordings

Many organizations jump at the chance to accomplice their customers nearly. This implies working next to each other with the customer, controlling them, preparing them and helping them. An online framework on your site stuffed with customer benevolent preparing materials and aides can be a precious device for any organization. Customers have every minute of everyday access to critical thinking issues and material. Combined with a period based client support and talk framework this can turn into a kick-ass arrangement that leaves your customers excited.

9. Guide guests to organization areas by utilizing maps and itemized bearings

Don't you simply abhor it when you need to visit an organization yet the bearings gave are insufficient. These days it's unpardonable. Each organization ought to give nitty gritty directions along a guide portraying the best course to contact them. Guests will dependably welcome an arrangement of directions with a guide which can be downloaded on a telephone or imprinted on paper which can be utilized to control them effectively.

10. Post opportunities and welcome continues on the site

It is as yet not an extremely surely understand certainty that your site can be an extraordinary hotspot for forthcoming workers. We get a considerable measure of resumes from great forthcoming representatives through our site. Keeping a rundown of occupation necessities (if there are any) guarantees that guests know which employments are up for snatches. This will likewise spare you a considerable measure of cash as far as memberships to work gateways or business specialists.

11. Issue Public statements

Now and again every organization should issue explanations to people in general about some issue or the other. Typically it's done through their PR organization. However, it is a smart thought to keep aside a segment of public statements which can be utilized by columnists to use in their stories. It additionally demonstrates straightforwardness in the organization's dealings.

12. Transfer Yearly Reports and declare money related outcomes.

This is obviously for recorded organizations who need to declare results to the general population. I am aware of many organizations who experience a great deal of inconvenience to refresh and post comes about alongside examination and messages from the organization pioneers. This demonstrates the organization is sharp and watches over its picture and its financial specialists.

Choosing a Programming Language to build Selenium Test Automation Suite

Selenium is a broadly utilized open source, convenient programming testing structure for web applications. In spite of the fact that Selenium accompanies a test area particular dialect, other programming languages (Java, C#, Ruby, Python) can be utilized to content tests also. Selenium is in this manner customer language impartial.

What language do we choose to assemble Selenium based test robotization suites?

How about we begin off by taking a gander at programming language all in all. In spite of the fact that a wide range of dialects exist and new ones are as yet being made, one must note that, about 90% of the ideas one learns in a particular dialect are likewise material to completely unique dialects. When one knows about the center rudiments (program configuration, control structures, information structures, and fundamental operation of a programming dialect), creating comparable aptitudes with another dialect just comes down to understanding the linguistic subtleties.

Anyway, which dialect would it be advisable for one to pick? As an individual, the appropriate response is direct: run with what you're most alright with.

Dima Kovalenko, in his book titled Selenium Design Patterns and Best Practices, represents the adaptability of Selenium, by indicating how some basic Selenium order sendkeys interpret crosswise over major scripting dialects.

Consistency offered by the Web Driver API crosswise over dialects, rearranges the way toward porting test information of one dialect to another. Test engineers wind up plainly more noteworthy advantages for their associations as they can be moved to any web venture, written in any programming dialect, and still have the capacity to make tests for it in a flash.

Consistency between various Selenium ties is material to most summons in the Selenium API. Yet, one must note that the cited case is a little distorted. Activity summons are encircled in a similar configuration in each dialect. Be that as it may, when utilizing diverse dialects to content code, after some time, contrasts will wind up noticeably obvious between the dialects. In this way, activities that capacity well in a specific dialect may be excess and outlandish in an alternate one.

As clarified over, no unmistakable most loved develops while picking a scripting language for Selenium. In any case, which one should an association select?

The response to this inquiry is less clear. A few elements must be considered:

            Introducing another dialect isn't simple. Utilizing a dialect that QA analyzers are as of now OK with, Best Selenium Training institute In Bangalore is the most advantageous decision. It is likewise substantially harder to work Selenium utilizing another dialect.

•          Local bolster for the programming dialect ought to likewise be considered. On the off chance that neighborhood engineers are knowledgeable about a specific dialect, at that point that dialect is a superior decision for QA groups. On the off chance that analyzers require help with the dialect, deformities, or improvement instruments, it winds up noticeably simpler to make utilization of the officially accessible in-house skill.

•          For people who haven't modified some time recently, utilizing content neighborly dialects like Python, Ruby and so on could be the most ideal approach. They have a simple expectation to learn and adapt, and furthermore permit Selenium tests to be composed rapidly and with less code.

•          Java is the most normally utilized language; however its contents can be mind boggling in view of the generally muddled punctuation.

At the point when all is said and done, each dialect has something novel to offer, thus there is no outright champ. Choosing the most suitable dialect comes down to the group's specific circumstance, and what they're endeavoring to achieve. It is imperative in such manner to look for some direction and certifiable assistance from players who have some involvement in the field, and whose bits of knowledge can help you when settling on that urgent pre-improvement choice.

All associations moving to Selenium for their web application testing face one normal inquiry.

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Introduction to JSP Standard Template Library (JSTL)

The JSP Standard Template Library (JSTL) is a very new component released by Sun for JSP programming. JSTL allows you to program your JSP pages using tags, rather than the scriptlet code that most JSP programmers are already accustomed to. JSTL can do nearly everything that regular JSP scriptlet code can do. You may be wondering why we need yet another HTML generation programming language.
JSTL was introduced was to allow JSP programmers to program using tags rather than Java code. To show why this is preferable, a quick example is in order. We will examine a very simple JSP page that counts to ten. We will examine this page both as regular scriptlet-based JSP, and then as JSTL.

Installing JSTL

To use JSTL, you must have a JSP 1.2 (or higher) container installed. One of the most commonly used JSP containers is the Apache Tomcat Web server. You can obtain a copy of Tomcat from http://jakarta.apache.org/tomcat/. Using Tomcat alone will allow you to use regular JSP scriptlet code. To use JSTL, you must install JSTL into Tomcat. JSTL can be obtained from the same source as Tomcat. The main URL for JSTL is http://java.sun.com/products/jsp/jstl/. To use JSTL, you must unzip the distribution files and install them into the correct locations within Tomcat.
To properly install JSTL for use with Tomcat, follow these three steps:

 

1. Copy the JSTL JAR files to Tomcat's lib directory.
   
   If you are using Windows, the likely location of your lib directory is C:\Program Files\Apache Tomcat 4.0\webapps\ROOT\WEB-INF\lib. There are a number of JAR files included with the JSTL release. You should copy each of these JAR files to the Tomcat JAR directory.

 

2. Copy the JSTL TLD files to Tomcat's web-inf directory.
   
   The web-inf directory is likely at this location: C:\Program Files\Apache Tomcat 4.0\webapps\ROOT\WEB-INF. If you examine the JSTL distribution files, you should notice eight files that end with the TLD extension. All eight files should be copied to your web-inf directory.

 

3. Modify the web.xml file to include the TLD files.
   
   Finally, you must modify your web.xml, and add an entry for all eight of the tag libraries that you added.

The JSTL Tag Libraries

JSTL is often spoken of as a single-tag library. JSTL is actually four tag libraries. These tag libraries are summarized as follows.

• Core Tag Library—Contains tags that are essential to nearly any Web application. Examples of core tag libraries include looping, expression evaluation, and basic input and output.

• Formatting/Internationalization Tag Library—Contains tags that are used to and parse data. Some of these tags will parse data, such as dates, differently based on the current locale.

• Database Tag Library—Contains tags that can be used to access SQL databases. These tags are normally used only to create prototype programs. This is because most programs will not handle database access directly from JSP pages. Database access should be embedded in EJBs that are accessed by the JSP pages.

• XML Tag Library—Contains tags that can be used to access XML elements. Because XML is used in many Web applications, XML processing is an important feature of JSTL.

In this article, we will only take a brief look at a few of the core tags. We will examine a simple example that shows how to process data that a user enters into a form. Before we examine this program, we must first see how JSTL handles expressions. Expression handling in JSTL is accomplished by using the EL expression language, just as it is done in JSP 2.0. In the next section, we will examine the EL expression language.

Conclusions

This article showed you some of the differences between the JSTL and standard JSP scriptlet programming. As you can see, JSTL allows a more consistent programming environment by allowing both HTML and procedural code to be expressed as tags. JSTL and tag libraries represent a new method of programming Web pages.
JSTL does not provide everything that a programmer would need to create a full-featured Web application. Further, some procedures that could be programmed in JSTL is often best not programmed in JSTL. One perfect example of this is the database JSTL tags. Except for very small Web applications, it is generally considered bad programming practice to embed actual database commands into a JSP page. The proper location for such program code is in Java beans and EJBs that will be used by your Web application. For such routines, you may consider creating your own tag libraries. This way, your JSP pages can use JSTL to perform basic programming procedures that are not unique to your business. You should implement your own tag libraries to implement components, which are unique to your business, which will be used by your Web application.
JSTL allows you to create a very consistent programming JSP-based application. This is done not just through JSTL, but through a combination of JSTL, your own custom tag libraries, and an underlying database. Understanding each of these components allows you to deploy an effective Web application.

12 Focuses To Enhance Your Website In 2018

2018 is coming, and right now is the best time to set aside some opportunity to take a gander at your site and see what could be enhanced keeping in mind the end goal to make progress in this coming year.

Better substance

Whatever your site is about, the way to getting movement and deals is to offer web designing courses in Bangalore guest’s valuable substance. Without it, it doesn't make a difference how quick, beautiful and upgraded your site is – it won't pull in any intrigue.

So if there's one thing we should all flourish at in 2018, it is unquestionably making the substance of our locales as well as can be expected. How would you characterize "great" substance? The great substance is the data that will influence individuals to need to peruse it, share it, and return to your site for more articles.

Make your Website design enhancement on point

A site very much advanced as far as Search engine optimization will motivate Web Designing Courses Bangalore Google to drive a considerable measure of movement to you, so this is, in fact, a remark on. Ensure that your blog utilizes pretty URLs, exact Meta portrayals and appropriate interior connecting.

Likewise, getting quality backlinks from significant locales will help.

Introduce an SSL testament on your site

Google has now begun to support secured sites (those beginning with HTTPS) over the great old HTTP ones. SSL offers encryption and wellbeing for your guests, and these days it will likewise support your Search engine optimization rankings. In this way, if your site doesn't have its own SSL testament yet, now it's an ideal opportunity to get one.

Revive your blog look and feel with another subject

Is your blog or webpage in contact with the present website composition patterns? How advanced is the code? Getting another WordPress topic won't just influence your site to look revived; it will likewise include a code in contact with the present norms, accepting the topic you pick is a quality one.

Among the plenty of premium Word Press topic sellers, I certainly prescribe Elegant Themes which highlights exquisite plan and clean, upgraded code.

Streamline your pictures for a speedier site

Pictures are justified regardless of a thousand words, however, they are additionally overwhelming on assets and can back off your site like there's no tomorrow. Streamlining your pictures isn't a hard procedure and will influence your site to stack way speedier.

Store, reserve, reserve!

Storing is a key procedure on any quality site. However, as insane as it sounds, regardless I see a considerable measure of destinations with no appropriate storing actualized, which backs off the stacking time.

On WordPress, some free, quality reserving modules are accessible. I utilize W3 Add up to Store for the majority of my locales and unquestionably prescribe it to any webpage proprietors hoping to support their site's execution and stacking time.

Ensure your site is portable cordial

In 2018, the greater part of your site movement will originate from handheld gadgets, for example, cell phones or tablets. In this way, it is an unquestionable requirement that your site shows legitimately on little screens. On the off chance that you are a genuine site proprietor, I'm certain you as of now have a responsive site. In any case, if not, don't hold up any more drawn out on the grounds that a non-advanced site is costing you movement.

Lift your online networking nearness

Online networking has been around for quite a while now, yet numerous bloggers and site proprietors neglect to utilize it to direct people to their destinations and develop a greater gathering of people.

A Facebook page and a Twitter account are required partners of an effective site. Depending on your specialty, different destinations like Reddit, YouTube, Pinterest or LinkedIn can be great wellsprings of movement also.

Change to a quality we have

You can't have a quality site without having a quality host. Shoddy shared facilitating will just get you an exceptionally fundamental administration which won't bargain well with activity and will experience the ill effects of numerous downtimes, i.e. times when your site basically can't become to by any stretch of the imagination.

Play out a stacking time speed test

I've talked about a significant number circumstances why stacking speed is essential. Keeping in mind the end goal to ensure that your site stacks sufficiently quick, you need to utilize the correct devices.

My top picks are Google PageSpeed Experiences and Pingdom. The first is Google's, so it's an extraordinary apparatus to know whether your site fits the quality benchmarks of the most effective internet searcher. The second device demonstrates huge amounts of information about your site's stacking time, enabling you to effortlessly locate what's wrong and fix it.

Refresh, divert or expel obsolete substance

On the off chance that you have been blogging for a long time, there's most likely some obsolete substance on your site. Obsolete substance, regardless of whether it used to be an important asset, is never something to be thankful for since it will give data that isn't exceptional to your gathering of people.

So what to do? Either refresh the substance, divert those old articles to more current substance, or if the asset doesn't have any backlinks to it, you can likewise consider evacuating it.

Chase broken connections

Broken connections are harming your Search engine optimization and give a negative ordeal to your peruses. In any case, if your site is tremendous or has been around for a long time, you can make certain that it contains broken connections.

To discover broken connections on your site, you can either utilize this convenient apparatus or far and away superior, the Broken Connection Checker module which finds broken connections and enables you to evacuate them by a solitary snap.