|Exam Name||:||Sun Certified Programmer for the Java 2 Platform, Standard Edition 5.0|
|Questions and Answers||:||581 Q & A|
|Updated On||:||February 21, 2019|
|PDF Download Mirror||:||Pass4sure 310-055 Dump|
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310-055 exam Dumps Source : Sun Certified Programmer for the Java 2 Platform, Standard Edition 5.0
Test Code : 310-055
Test Name : Sun Certified Programmer for the Java 2 Platform, Standard Edition 5.0
Vendor Name : SUN
Q&A : 581 Real Questions
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ATLANTA, Oct. 1, 2018 /PRNewswire/ -- Landis+Gyr (SWISS: LAND.SW) announced its support for the Wi-solar FAN Certification software launched by way of the Wi-solar Alliance previous nowadays. As a Promoter Member of the Wi-sun Alliance that holds a Board of directors place, Landis+Gyr joins other member businesses in promoting the implementation of open, requirements-based container enviornment community (FAN) and the internet of things (IoT).
Utilities have utilized field area networks to provide coverage for speaking property reminiscent of smart meters, sensors and automation contraptions across their carrier territory. With the growth in sensible city functions, normal specifications for FAN connectivity will increase the selections purchasable for purposes and contraptions in a position to be part of the community.
Wi-sun's FAN Certification program will supply compliance testing of community accessories and devices to a communications profile developed from relevant open standards and certify the product's ability to interoperate.
"Landis+Gyr strongly supports this certification effort for the long run value it'll add for utility grid modernization and IoT courses," noted Marius Chilom, Senior vice president and Chief technology Officer of solutions for Landis+Gyr. "The improved the interoperability, the greater advantageous these networks may be for the next wave of sensible grid and smart metropolis functions."
"Certification ensures interoperability, which is essential to the increase of IoT innovation," talked about Phil Beecher, President and CEO, Wi-solar Alliance. "we are pleased to officially launch the FAN Certification application and are excited for the first wave of FAN-licensed products to be deployed into the market starting Q1 2019."
The certification application will make certain utilities, cities and repair providers have access to adaptable, multi-service networks that will help make sure interoperability into the longer term. different key merits for community operators consist of:
All Wi-solar licensed products are fastidiously confirmed via a Wi-sun appointed third-birthday party verify lab to ensure the instruments work together readily and securely for rapid time to market. licensed instruments include a digital certificate to authenticate entry to a Wi-sun FAN, vastly reducing vulnerability to cyber safety threats. under a separate agreement, Wi-sun Alliance has appointed GlobalSign as the third-birthday celebration service provider of digital certificates for the Wi-solar FAN certification program.
About Landis+GyrLandis+Gyr is the leading international provider of integrated power administration solutions for the utility sector. offering one of the vital broadest portfolios of products and functions to handle complex trade challenges, the company supplies comprehensive options for the basis of a better grid, including smart metering, distribution network sensing and automation tools, load control, analytics and power storage. Landis+Gyr operates in over 30 countries throughout five continents. With revenue of approximately USD 1.7 billion, the business employs c. 6,000 americans with the only real mission of assisting the world manage power more advantageous. more assistance is purchasable at www.landisgyr.com.
in regards to the Wi-solar AllianceThe Wi-solar Alliance is a global non-profit member-based mostly affiliation made up of business main groups. Its mission is to power the international proliferation of interoperable instant options for use in smart cities, sensible grids and other web of issues (IoT) applications the use of open international requisites from groups, such as IEEE802, IETF, TIA, TTC and ETSI. With greater than a hundred and eighty individuals worldwide, membership of the Wi-sun Alliance is open to all industry stakeholders and comprises silicon vendors, product providers, capabilities providers, utilities, universities, companies and municipalities and native government businesses.For more tips, please discuss with: www.wi-solar.org.
Wi-sun Alliance and the Wi-solar Alliance brand are trademarks of the Wi-solar Alliance.
View long-established content material:https://www.prnewswire.com/information-releases/landisgyr-helps-lead-wi-solar-alliances-fan-certification-application-for-big-scale-iot-communique-networks-300721548.html
Paves a way to accelerate IoT conclusion gadget Interoperability
SAN RAMON, Calif., Oct. 1, 2018 /PRNewswire/ -- The Wi-sun Alliance, a world ecosystem of member agencies searching for to speed up the implementation of open specifications-based mostly container enviornment Networks (FAN) and the cyber web of issues (IoT), these days announced its FAN Certification software. FAN is a communications infrastructure for extremely gigantic-scale networks. In the same method you employ the internet on a smartphone or computing device, a box area community lets contraptions interconnect onto one regular network.
the provision of the FAN Certification program is the result of the vision, collaboration and dedication of a couple of Wi-sun Member companies. through the certification software, the Wi-solar Alliance certifies items in accordance with their compliance to a communications profile derived from applicable open requirements and their ability to interoperate with other Wi-sun licensed products.
The FAN Certification application will certify instruments for use by using utilities, metropolis developers and other provider suppliers to simplify and help tremendous-scale, outside networks for smart cities, smart utilities and different IoT rollouts – and to aid reduce charges and delays. Wi-solar contributors plan to announce certified products in this autumn 2018.
Proprietary methods are not any longer sufficiently flexible, or as competitively priced as solutions in response to open requisites, and should turn into much less valuable within a couple of years. Adhering to the Wi-solar FAN profile in response to open IEEE and IETF requirements makes it possible for carrier suppliers, wise cities and utilities to install adaptable multi-provider networks and should assist be certain interoperability, no longer simplest nowadays, but also for a long time to come.
"Wi-sun continues to be on the forefront of IoT innovation, and as cities, utilities and the business grows their IoT networks, they're increasingly recognizing that business-broad open necessities are fundamental for interoperability and scalability," says Phil Beecher, President and CEO of the Wi-sun Alliance. "FAN Certification is an endorsement for governments and the industry that our individuals' products are compliant to those open necessities, and safeguards best, interoperability, safety, scalability – and ultimately gives customers a aggressive competencies."
Key advantages of FAN Certification consist of:
All Wi-solar certified products are carefully confirmed by an authorized Wi-solar appointed third-birthday party examine lab to be sure the devices work collectively without difficulty and securely for quick time to market. certified instruments encompass a digital certificate to authenticate entry to a Wi-sun FAN network, vastly decreasing vulnerability to cyber security threats. under a separate contract, Wi-solar has selected GlobalSign to give certificate Authority (CA) functions to Wi-sun Alliance member corporations.
Third party comments:
Alex Davies, Senior Analyst, Rethink expertise research and Editor of rebel: "Open specifications are some of the most advantageous how you can make certain mass adoption of a expertise. As with WiFi and the 3GPP mobile protocols, Wi-sun's FAN is providing varied decisions for equipment and know-how suppliers to facilitate customer hobby. energy suppliers and grid operators are concerned about supplier lock-in, specially due to the lengthy life cycles of their deployments. To this end, Wi-sun should still supply a solution to their mission-vital issues that different LPWAN alternatives can not. It opens the door for them to extend into other IoT markets, with smart cities a tremendous opportunity."
Iker Urrutia, supervisor, smart Grids, Avangrid: "IoT networking options according to open specifications and licensed to the Wi-solar FAN profile may be crucial in obtaining actual interoperability for utility functions, corresponding to AMI, accelerating the digitization of the grid in a value useful means."
Colton Ching, Senior vice chairman of Planning & technology at Hawaiian electric powered: "We proceed to peer Wi-sun expertise as a major enabler for giant-scale IoT purposes right through Hawaii with the supply of its FAN Certification application. The Wi-sun Alliance and its individuals have taken a major step forward in bringing multi-vendor, interoperable options to fruition."
FAN Certification Availability: The FAN Certification software has been developed through the collaboration of Wi-sun member corporations, together with product providers and collaborators taking part in interoperability pursuits to show the requirements and certification test software. here are among one of the most businesses who were actively leading a way to certification: Analog contraptions, Cisco, EPRI, Itron, Kyoto institution/Nissin systems, Landis+Gyr, ProCubed, Renesas and ROHM Europe.
To gain knowledge of extra about the way to publish your products to be licensed, please visit http://www.wi-sun.org
making certain a product is compliant will also be complicated so the Wi-solar Alliance is eager to aid and handle any issues. Please be part of Wi-solar for an upcoming webinar on Oct sixteen, 2018 at 8AM PT. during this webinar we will give an overview of the importance of certification and the way to navigate the manner to achieve FAN Certification. For extra counsel and to register please click on here https://attendee.gotowebinar.com/register/9187903284805872385.
about the Wi-sun AllianceThe Wi-sun Alliance is a world non-profit member-based mostly association made of trade leading groups. Its mission is to pressure the international proliferation of interoperable instant options for use in sensible cities, wise grids and other internet of things (IoT) purposes the usage of open global requisites from agencies, equivalent to IEEE802, IETF, TIA, TTC and ETSI. With more than one hundred eighty contributors international, membership of the Wi-solar Alliance is open to all industry stakeholders and contains silicon companies, product providers, features providers, utilities, universities, organisations and municipalities and native government agencies.
For extra assistance, please seek advice from: www.wi-solar.org.
Wi-solar Alliance and the Wi-solar Alliance emblem are emblems of the Wi-sun Alliance.linked hyperlinks
source Wi-sun Alliance
These quizzes were written in accordance with the sun Java certification assessments. that you can discover extra Java questions in the Oracle quizzes part - the Java certifications prior to now provided with the aid of solar Microsystems, akin to sun certified Java Programmer (SCJP), are now part of the Oracle certification program.
The sun certified Programmer for the Java 2 Platform examination changed into at the start the first step toward many advanced Java certifications and accepted as proof of fundamental Java potential by solar, apoplectic Hewlett-Packard, site IBM, Oracle, and Sybase. for the reason that then Oracle received sun certifications, but these questions may still prove useful for making ready for Java certification assessments.
Thirty questions in response to the goals for the solar certified Programmer for the J2SE 1.4 Platform examination.
This collection of questions become created to assist candidates prepare for the sun Microsystems licensed enterprise Architect for Java know-how examination. solar certifications have due to the fact that been rolled into the Oracle certification program, ed but these questions can also nevertheless show helpful.
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This chapter explains what Android is, how and why it was developed, and where the platform fits in to the established mobile marketplace.This chapter is from the book
The mobile development community is at a tipping point. Mobile users demand more choice, more opportunities to customize their phones, and more functionality. Mobile operators want to provide value-added content to their subscribers in a manageable and lucrative way. Mobile developers want the freedom to develop the powerful mobile applications users demand with minimal roadblocks to success. Finally, handset manufacturers want a stable, secure, and affordable platform to power their devices. Upuntil now single mobile platform has adequately addressed the needs of all the parties.
Enter Android, which is a potential game-changer for the mobile development community. An innovative and open platform, Android is well positioned to address the growing needs of the mobile marketplace.
This chapter explains what Android is, how and why it was developed, and where the platform fits in to the established mobile marketplace.
To understand what makes Android so compelling, we must examine how mobile development has evolved and how Android differs from competing platforms.Way Back When
Remember way back when a phone was just a phone? When we relied on fixed landlines? When we ran for the phone instead of pulling it out of our pocket? When we lost our friends at a crowded ballgame and waited around for hours hoping to reunite? When we forgot the grocery list (Figure 1.1) and had to find a payphone or drive back home again?
Figure 1.1 Mobile phones have become a crucial shopping accessory.
Those days are long gone. Today, commonplace problems like these are easily solved with a one-button speed dial or a simple text message like “WRU?” or “20?” or “Milk and?”
Our mobile phones keep us safe and connected. Nowadays, we roam around freely, relying on our phones not only to keep in touch with friends, family, and coworkers, but also to tell us where to go, what to do, and how to do it. Even the most domestic of events seem to revolve around my mobile phone.
Consider the following true, but slightly enhanced for effect, story:
My point here? Mobile phones can solve just about anything—and we rely on them for everything these days.
You notice that I used half a dozen different mobile applications over the course of this story. Each application was developed by a different company and had a different user interface. Some were well designed; others not so much. I paid for some of the applications, and others came on my phone.
As a user, I found the experience functional, but not terribly inspiring. As a mobile developer, I wished for an opportunity to create a more seamless and powerful application that could handle all I’d done and more. I wanted to build a better bat trap, if you will.
Before Android, mobile developers faced many roadblocks when it came to writing applications. Building the better application, the unique application, the competing application, the hybrid application, and incorporating many common tasks such as messaging and calling in a familiar way were often unrealistic goals.
To understand why, let’s take a brief look at the history of mobile software development.“The Brick”
The Motorola DynaTAC 8000X was the first commercially available cell phone. First marketed in 1983, it was 13 x 1.75 x 3.5 inches in dimension, weighed about 2.5 pounds, and allowed you to talk for a little more than half an hour. It retailed for $3,995, plus hefty monthly service fees and per-minute charges.
We called it “The Brick,” and the nickname stuck for many of those early mobile phones we alternatively loved and hated. About the size of a brick, with a battery power just long enough for half a conversation, these early mobile handsets were mostly seen in the hands of traveling business execs, security personnel, and the wealthy. First-generation mobile phones were just too expensive. The service charges alone would bankrupt the average person, especially when roaming.
Early mobile phones were not particularly full featured. (Although, even the Motorola DynaTAC, shown in Figure 1.2, had many of the buttons we’ve come to know well, such as the SEND, END, and CLR buttons.) These early phones did little more than make and receive calls and, if you were lucky, there was a simple contacts application that wasn’t impossible to use.
Figure 1.2 The first commercially available mobile phone: the Motorala DynaTAC.
These first-generation mobile phones were designed and developed by the handset manufacturers. Competition was fierce and trade secrets were closely guarded. Manufacturers didn’t want to expose the internal workings of their handsets, so they usually developed the phone software in-house. As a developer, if you weren’t part of this inner circle, you had no opportunity to write applications for the phones.
It was during this period that we saw the first “time-waster” games begin to appear. Nokia was famous for putting the 1970s video game Snake on some of its earliest monochrome phones. Other manufacturers followed, adding games like Pong, Tetris, and Tic-Tac-Toe.
These early phones were flawed, but they did something important—they changed the way people thought about communication. As mobile phone prices dropped, batteries improved, and reception areas grew, more and more people began carrying these handy devices. Soon mobile phones were more than just a novelty.
Customers began pushing for more features and more games. But, there was a problem. The handset manufacturers didn’t have the motivation or the resources to build every application users wanted. They needed some way to provide a portal for entertainment and information services without allowing direct access to the handset.
And what better way to provide these services than the Internet?Wireless Application Protocol (WAP)
It turned out allowing direct phone access to the Internet didn’t scale well for mobile.
When the first clamshell phone, the Motorola StarTAC, was released in 1996, it merely had a LCD 10-digit segmented display. (Later models would add a dot-matrix type display.) Meanwhile, Nokia released one of the first slider phones, the 8110—fondly referred to as “The Matrix Phone,” as the phone was heavily used in films. The 8110 could display four lines of text with 13 characters per line. Figure 1.3 shows some of the common phone form factors.
Figure 1.3 Various mobile phone form factors: the candy bar, the slider, and the clamshell.
With their postage stamp-sized low-resolution screens and limited storage and processing power, these phones couldn’t handle the data-intensive operations required by traditional Web browsers. The bandwidth requirements for data transmission were also costly to the user.
The Wireless Application Protocol (WAP) standard emerged to address these concerns. Simply put, WAP was a stripped-down version of HTTP, which is the backbone protocol of the Internet. Unlike traditional Web browsers, WAP browsers were designed to run within the memory and bandwidth constraints of the phone. Third-party WAP sites served up pages written in a markup language called Wireless Markup Language (WML). These pages were then displayed on the phone’s WAP browser. Users navigated as they would on the Web, but the pages were much simpler in design.
The WAP solution was great for handset manufacturers. The pressure was off—they could write one WAP browser to ship with the handset and rely on developers to come up with the content users wanted.
The WAP solution was great for mobile operators. They could provide a custom WAP portal, directing their subscribers to the content they wanted to provide, and rake in the data charges associated with browsing, which were often high.
Developers and content providers didn’t deliver. For the first time, developers had a chance to develop content for phone users, and some did so, with limited success.
Most of the early WAP sites were extensions of popular branded Web sites, such as CNN.com and ESPN.com, looking for new ways to extend their readership. Suddenly phone users accessed the news, stock market quotes, and sports scores on their phones.
Commercializing WAP applications was difficult, and there was no built-in billing mechanism. Some of the most popular commercial WAP applications that emerged during this time were simple wallpaper and ringtone catalogues, allowing users to personalize their phones for the first time. For example, the users browsed a WAP site and requested a specific item. They filled out a simple order form with their phone number and their handset model. It was up to the content provider to deliver an image or audio file compatible with the given phone. Payment and verification were handled through various premium-priced delivery mechanisms such as Short Message Service (SMS), Enhanced Messaging Service (EMS), Multimedia Messaging Service (MMS), and WAP Push.
WAP browsers, especially in the early days, were slow and frustrating. Typing long URLs with the numeric keypad was onerous. WAP pages were often difficult to navigate. Most WAP sites were written once for all phones and did not account for individual phone specifications. It didn’t matter if the end-user’s phone had a big color screen or a postage stamp-sized monochrome one; the developer couldn’t tailor the user’s experience. The result was a mediocre and not very compelling experience for everyone involved.
Content providers often didn’t bother with a WAP site and instead just advertised SMS short codes on TV and in magazines. In this case, the user sent a premium SMS message with a request for a specific wallpaper or ringtone, and the content provider sent it back. Mobile operators generally liked these delivery mechanisms because they received a large portion of each messaging fee.
WAP fell short of commercial expectations. In some markets, such as Japan, it flourished, whereas in others, like the United States, it failed to take off. Handset screens were too small for surfing. Reading a sentence fragment at a time, and then waiting seconds for the next segment to download, ruined the user experience, especially because every second of downloading was often charged to the user. Critics began to call WAP “Wait and Pay.”
Finally, the mobile operators who provided the WAP portal (the default home page loaded when you started your WAP browser) often restricted which WAP sites were accessible. The portal allowed the operator to restrict the number of sites users could browse and to funnel subscribers to the operator’s preferred content providers and exclude competing sites. This kind of walled garden approach further discouraged third-party developers, who already faced difficulties in monetizing applications, from writing applications.Proprietary Mobile Platforms
It came as no surprise when users wanted more—they will always want more.
Writing robust applications such as graphic-intensive video games with WAP was nearly impossible. The 18-year-old to 25-year-old sweet-spot demographic—the kids with the disposable income most likely to personalize their phones with wallpapers and ringtones—looked at their portable gaming systems and asked for a device that was both a phone and a gaming device or a phone and a music player. They argued that if devices such as Nintendo’s Game Boy could provide hours of entertainment with only five buttons, why not just add phone capabilities? Others looked to their digital cameras, Palms, Blackberries, iPods, and even their laptops and asked the same question. The market seemed to be teetering on the edge of device convergence.
Memory was getting cheaper; batteries were getting better; and PDAs and other embedded devices were beginning to run compact versions of common operating systems such as Linux and Windows. The traditional desktop application developer was suddenly a player in the embedded device market, especially with Smartphone technologies such as Windows Mobile, which they found familiar.
Handset manufacturers realized that if they wanted to continue to sell traditional handsets, they needed to change their protectionist policies pertaining to handset design and expose their internal frameworks, at least, to some extent.
A variety of different proprietary platforms emerged—and developers are still actively creating applications for them. Some Smartphone devices ran Palm OS (now Garnet OS) and RIM Blackberry OS. Sun Microsystems took its popular Java platform and J2ME emerged (now known as Java Micro Edition [Java ME]). Chipset maker Qualcomm developed and licensed its Binary Runtime Environment for Wireless (BREW). Other platforms, such as Symbian OS, were developed by handset manufacturers such as Nokia, Sony Ericsson, Motorola, and Samsung. The Apple iPhone OS (OS X iPhone) joined the ranks in 2008. Figure 1.4 shows several different phones, all of which have different development platforms.
Figure 1.4 Phones from various mobile device platforms.
Many of these platforms have associated developer programs. These programs keep the developer communities small, vetted, and under contractual agreements on what they can and cannot do. These programs are often required and developers must pay for them.
Each platform has benefits and drawbacks. Of course, developers love to debate over which platform is “the best.” (Hint: It’s usually the platform we’re currently developing for.)
The truth is no one platform has emerged victorious. Some platforms are best suited for commercializing games and making millions—if your company has brand backing. Other platforms are more open and suitable for the hobbyist or vertical market applications. No mobile platform is best suited for all possible applications. As a result, the mobile phone has become increasingly fragmented, with all platforms sharing part of the pie.
For manufacturers and mobile operators, handset product lines became complicated fast. Platform market penetration varies greatly by region and user demographic. Instead of choosing just one platform, manufacturers and operators have been forced to sell phones for all the different platforms to compete. We’ve even seen some handsets supporting multiple platforms. (For instance, Symbian phones often also support J2ME.)
The mobile developer community has become as fragmented as the market. It’s nearly impossible to keep track of all the changes in the market. Developer specialty niches have formed. The platform development requirements vary greatly. Mobile software developers work with distinctly different programming environments, different tools, and different programming languages. Porting among the platforms is often costly and not straightforward. Keeping track of handset configurations and testing requirements, signing and certification programs, carrier relationships, and application marketplaces have become complex spin-off businesses of their own.
It’s a nightmare for the ACME Company wanting a mobile application. Should they develop a J2ME application? BREW? iPhone? Windows Mobile? Everyone has a different kind of phone. ACME is forced to choose one or, worse, all of the above. Some platforms allow for free applications, whereas others do not. Vertical market application opportunities are limited and expensive.
As a result, many wonderful applications have not reached their desired users, and many other great ideas have not been developed at all.
Introduction to Java Programming Language
Java is a general-purpose, object-oriented programming language designed for the development of software for consumer electronic devices, such as TVs, VCRs, toasters, etc.
Java is a platform neutral language, which means that it is not tied to any particular hardware or operating system. It guarantees users to ‘write once, run anywhere.' The Java language is supported by almost every operating system, such as Sun Solaris, RedHat, Windows, etc.
The Java programming language was developed by Sun Microsystems of the USA in 1991, it was originally called Oak by James Gosling, who was one of the inventors of the language. The main goal for the developers was to make the language highly reliable, portable and simple.
The team for the development of Java language included Patrick Naughton, who discovered that the existing languages such as C and C++ had some major drawbacks in terms of reliability and portability. They modeled the new language Java on C and C++, while removing some features that they considered constraints. This made Java a really simple, portable, and powerful language. To learn Java basics, let’s revise the Java syntax.The History of Java
There is a chronicle of events that occurred during the course of development of the Java language.
The main goal was to design a language that could offer solutions to problems encountered in modern programming. The goal was for the language to be reliable, portable, and distributed, and at the same time, it needed to be simple, compact, and interactive.Compiled and Interpreted
Java language combines both of these approaches, thus making Java a two-stage system. This approach was never offered before, as any language before was either compiled or interpreted.
Firstly, the Java compiler translates source code into bytecode instructions; bytecodes are not machine instructions.
Secondly, the Java interpreter generates machine code that can be directly executed by the machine that is running the Java program.Independent and Portable
Java programs can be easily moved from one system to another, anywhere and anytime. With changes or an upgrade in the operating system, processors and system resources will not force any changes in Java programs.
Java programming ensures portability in two ways. Firstly, Java compiler generates bytecode instructions that can be implemented on any machine, and secondly, the size of the primitive data types are machine independent.Object-Oriented
Almost everything in Java language is an object, which makes it a true object-oriented language. All program code and data reside within objects and classes. Java comes with an extensive set of classes that are arranged in packages, which can be used in program inheritance.Robust and Secure
Java provides many safeguards to ensure reliable code. It has strict run-time, checking for data types. It is designed like a garbage collected language, i.e., it captures series errors and eliminates any risk of crashing the system.
Java systems verify all the memory access and, thus, ensure that no virus is communicated with an applet.Distributed
Java programming facilitates both the sharing of data and programs. Java applications can open and access remote objects on the Internet as easily as on any local system.Simple, Small, and Familiar
Java is a simplified version of C++, which is why it is familiar and yet different as it eliminates all the redundant and unreliable code. For example, Java does not use pointers, preprocessor header files, and many others. It also eliminates operator overloading and multiple inheritances in Java.Multithreaded and Interactive
Multithreaded means handling different tasks simultaneously. Java language supports multithreaded programs, which means that we need not have to wait for one task to finish for another to start. This feature of Java greatly improves the interactive performance of graphical applications.High Performance
Java programming performance is very impressive, considering the fact that is an interpreted language, mainly because of the bytecodes. Java architecture is designed to reduce overheads.Dynamic and Extensible
Java is a dynamic language; it is capable of dynamically linking in new class libraries, methods, and objects. It can also determine the type of class through a query.Ease of Development
Java 2 standard edition (J2SE) 5.0 supports features such as Generics, Enhanced for loop, Autoboxing or unboxing, Typesafe enums, varargs, Static import, and Annotation. These Java features make it easy for Java programmers by shifting the responsibility of creating the reusable code to the compiler, and also, the resulting code is free from bugs.Scalability and Performance
J2SE 5.0 improves the startup time and reduces the amount of memory used in the Java 2 runtime environment. Learn more features of Java here.Comparison: C Vs. Java Vs. C++
C Vs. Java
The major difference between C and Java is that Java is an object-oriented language and has a mechanism to define classes and objects in Java. The features of C that are not included in Java are:
The main difference between C++ and Java is that Java is a true object-oriented language while C++ just adds an object-oriented extension to C. The increment operator in C++ indicates the same thing.
The features listed below are intentionally omitted from Java to make it better.
Let’s discuss Java Regular Expression and Java Array here.Java Language and the Internet
Java is often called the "Internet language" because the first application program written in Java was HotJava, a web browser used to run applets on the Internet. Internet users can use Java to create applets and run them locally using HotJava. A Java-enabled browser to download an applet located anywhere on the Internet can also be used.
Java applets have made the Internet a true extension of the storage system on local computers. Internet users can also set up their websites containing Java applets that could be used by remote users.Java Programming and World Wide Web
World Wide Web (www) is an information retrieval system where any information or file is identified as Uniform source Locators (URLs) and are interlinked via hypertext links. WWW can be accessed with the help of internet.
Internet and Java programming both had the same philosophy, and thus, they were incorporated with each other easily. Java made it possible for the World Wide Web to support animation, graphics, games, and a wide range of special effects.
To communicate with any web page, Java uses APPLETs. The steps involved are:
The operations of Java and Java-enabled browsers on the Internet require a variety of support systems, namely:
The Java environment includes a large number of Java development tools and Java classes and methods.
The Java development tools are part of the system known as the Java Development Kit (JDK), and the classes and the methods in Java are a part of the Java Standard Library (JSL), also known as the Application Programming Interface (API).Java Development Kit (JDK)
The Java Development Kit includes:
The Java Standard Library includes classes and packages, some most commonly used packages are the Language Support Packages. This is a collection of Java classes and methods required for implementing basic features of Java.
The java Runtime Environment facilitates the execution of Java programs, comprising the Java Virtual Machine (JVM). The JVM interprets the intermediate Java bytecode and generates the desired output.
1) Java plugin — This enables the execution of a Java applet.
2) Java Web start — This enables an application to directly launch from the web browser without installing. Learn more about Java Datatypes and Java Modifiers here.Java Constructs
Constructs are basically reserved keywords in any language, which cannot be used in rest of the programs, i.e., a name of variables in Java, class, or method. Java has around 50 such words, they include:abstract for new enum super assert goto package extends switch boolean if private final synchronized break implements protected finally this byte import public float throw case instance of continue while throws catch int default return transient char interface do short try class long double static void const native else strictfp volatile Conclusion
Finally, In this Java guide, we learned about the history of Java programming language, important Java features, how Java is different from C and C++, how it is incorporated in World Wide Web with help of Web browsers, and the environment required for running Java applications. Hope this helps. Let us know what you think in the coments below!
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