#what is interface in java and its example

[roseliejack123]

From Novice to Java Pro: A Step-by-Step Learning Journey

Java programming, renowned for its platform independence and versatility, is a sought-after language in the world of software development. It's the language behind countless web applications, mobile apps, game development, and more. This blog serves as your comprehensive guide to embarking on a journey to learn and master Java programming. We'll walk you through the basics of programming, Java's syntax and structure, the essential tools and libraries, and the importance of practice. 

The Path to Java Proficiency:

1. Understand the Basics of Programming:

Prior Experience: If you're new to programming, it's crucial to start with the foundational concepts. Variables, data types, control structures (if-else, loops), and functions are universal principles that you need to understand before delving into any programming language, including Java.

What to Learn: Begin by grasping the basics of programming logic and problem-solving. Familiarize yourself with concepts like variables (to store data), data types (to specify the kind of data), and control structures (to make decisions and loop through actions). These concepts serve as the building blocks for Java programming.

2. Java Syntax and Structure:

Prior Experience: As you delve into Java, you'll find that it's an object-oriented language with its unique syntax and structure. While prior programming experience is beneficial, it's not a prerequisite. You can start with Java as your first language.

What to Learn: Java introduces you to classes and objects. Classes are blueprints for creating objects, which are instances of classes. Java is known for its object-oriented nature, where you'll encounter concepts like inheritance (creating new classes based on existing ones), polymorphism (objects of different classes can be treated as objects of the same class), encapsulation (data hiding), and abstraction (simplifying complex reality by modeling classes based on real-world objects).

3. Get Your Hands on a Compiler and IDE:

Prior Experience: No prior experience is required to set up your Java development environment.

What to Learn: To start writing and running Java code, you'll need to install a Java Development Kit (JDK), which includes the Java compiler (javac). This kit allows you to compile your source code into bytecode that the Java Virtual Machine (JVM) can execute. Additionally, install an Integrated Development Environment (IDE) like Eclipse, IntelliJ IDEA, or NetBeans. These IDEs provide a user-friendly interface for coding, debugging, and managing your Java projects.

4. Learn the Java Standard Library:

Prior Experience: No specific prior experience is necessary, but familiarity with basic programming concepts is beneficial.

What to Learn: Java's power lies in its extensive standard library. This library includes pre-built classes and packages that simplify common programming tasks. For example, you can utilize classes in the java.io package to handle file input and output. You'll explore the java.lang package, which provides fundamental classes like String and Integer. Understanding this library is crucial for performing operations like file handling, string manipulation, and working with data structures.

5. Practice, Practice, Practice:

Prior Experience: No prior experience is required. This stage is suitable for beginners and those with basic programming knowledge.

What to Learn: The key to mastering Java or any programming language is practice. Apply the knowledge you've gained by working on small coding projects. Start with simple programs and gradually move on to more complex tasks. Solving programming challenges, such as those on websites like LeetCode or HackerRank, is an excellent way to put your skills to the test. Build simple applications to get hands-on experience in real-world scenarios.

6. Join Java Communities:

Prior Experience: No prior experience is needed to join Java communities.

What to Learn: Engage with Java communities and forums, such as Stack Overflow or Reddit's r/java. These platforms provide a space to ask questions, seek advice, and learn from experienced Java developers. You can also contribute by answering questions and sharing your knowledge.

7. Enroll in Java Courses:

Prior Experience: Enrolling in Java courses is suitable for learners of all levels, from beginners to advanced users.

What to Learn: ACTE Technologies offers comprehensive Java training programs that cater to a diverse range of learners. These programs are designed to provide hands-on experience and real-world examples, ensuring that you gain practical skills in Java programming.

In your journey to master Java programming, structured training plays a pivotal role. ACTE Technologies is a trusted partner, offering Java training programs for learners at all levels. Whether you're a beginner taking your first steps in Java or an experienced programmer seeking to expand your skill set, they can provide the guidance and resources needed to excel in the world of Java development. Consider exploring their Java courses to kickstart or enhance your Java programming journey. Java programming is a versatile and essential language, and mastering it is a rewarding journey. With dedication, practice, and structured training, you can become a proficient Java developer. Institutions like ACTE Technologies offer valuable resources and courses to accelerate your learning process, making your journey to Java mastery even more efficient.

[nostalgebraist]

from BASIC to the fae realm, and back again

When I was a kid, I learned to program in a few different flavors of BASIC.  When I was a teenager, I tried to graduate from BASIC, which I knew was a sort of training-wheels language, to a “real” language, which at the time seemed to mean C, C++, or maybe Java.

This was a confusing and difficult process.  The first time, at age 13, I tried to learn C++ by reading one of those “Learn [language] in [X days]” books.  I read all the way through the book, but found most of it baffling, and never actually sat down to write any C++.  Then later, at 17, I said “I am going to learn C, dammit,” Googled my way to the About.com tutorial on C, and actually started programming in C.

I was able to use the language well enough to write some things like a simple raytracer, and I found the process entertaining, but mostly as a demonstration of will and dedication; I still found C itself pretty bizarre, and I felt proud of myself for managing to get things done using these strange alien invocations, rather than really grokking the language and the demands it made of me. My code was probably exquisitely terrible, although it did compile and run.

I gather this is a pretty typical experience from that time period. What’s funny, looking back, is that the “serious, adult programming” (i.e. programming for $) I currently do feels much closer to the Eden of BASIC than C did.

This isn’t just a high-level vs. low-level thing.  I think it’s more fundamentally about clarity of abstraction boundaries.

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A high-level language like Python tries hard to put you in an abstract world of entities that feel stable and part of the same world, without the lower-level implementation poking its head through the cracks.  But (as far as my limited understanding goes) this is also true of the lowest-level languages.  The user of assembly or byte code doesn’t engage directly with any specific physical machine; they use an abstract interface called the instruction set architecture which can be implemented in multiple ways, and they engage with abstract entities like “logical registers” that may get mapped to different physical registers on the fly.  The mapping is invisible, outside of your control -- securely “lower-level” than the programmer’s world.

C is not like this.  It doesn’t define any stable world that makes sense on its own terms.  Or rather, the only stable world that exists in C exists on a lower level than the entities the language seems to be talking about, and its constructs only make full sense as convenient and elaborate macros for common lower-level operations.  You can only really get C when you’ve learned to view a, say, “int” as a collection of shorthands for things people often do with little groups of bytes in memory, and not as an abstract data type.

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The clearest example for me is arrays.  Does C “have” arrays?  Well, it has an array type, and you can create an array in stack memory and it behaves the ways you expect.  (Indeed, C’s interface to stack memory looks deceptively like high-level programming, which was very confusing to me at first.)

All right, let’s pass our array to another function.  C passes by value, but you generally don’t want to pass arrays by value, and indeed, C does not do so.  Instead, if you try to pass an array, you get something that’s almost an array, but lacks a piece of data (the length).

What is this thing?  Well, it’s actually a reference -- but not a reference to the array (which would be passing the array by reference), it’s a reference to the first element.  But if you try using array indexing like a[i] on it, it works as if you had the array itself.  Why?  Because the “array indexing” notation in C works on any object that’s a reference: it’s actually shorthand for getting the value out of a reference that is “i units away” from the original reference.

Why does the concept of “i units away from this reference” make sense in C?  After all, you wouldn’t look at a URL and say “now give me the one to its left.” It makes sense in C . . . because C’s implementation of a reference is something called a “pointer” which stores a location in an actual address space (the floor is leaking!), and C’s implementation of an array allocates memory so the individual objects are actually next to each other in the address space, as opposed to say a linked list (the floor is disintegrating!).

...and then that all applies only for stack memory.  Creating the same array/“array” in heap memory looks totally different, and involves importing functions from the standard library, and those functions don’t know how much memory the different C objects need, so to get an array with 50 ints you need to look up how big an int is and convert that to bytes.  If you do that right, you get another one of the pseudo-array things (first element references), but again the function doesn’t know anything about C types so you’ll need to convert it to an int reference.

(If you think about it, these are steps that also need to happen when you’re making a stack array, but in that case, this rote and predictable bundle of operations was conveniently automated for you.  Not here -- now it’s your turn to do them.  It takes a village, it seems, to implement array functionality.)

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Sometimes in C the floor can look solid.  If you have an object of type double, then it takes up the right amount of memory (whatever it happens to be) to represent a double-precision floating-point number, and if you use arithmetic operators on it, floating-point arithmetic happens.  And you can just trust it to happen without thinking about how a specific computer is doing it.  C connects you with an implementation of floating-point numbers, as a high-level language would understand that phrase.  But the presence of such complete implementations makes it, if anything, harder to work simultaneously with the incomplete ones.  You’re constantly asking yourself, “wait, what level am I on right now?”

Some of my confusions when I first tried to learn C/C++ can be read as confusions about what I should expect to be “implemented” for me, exacerbated by a conflation between “fully implemented for you” and “possible without vast effort.”  One of the later chapter of the C++ book was an extended walkthrough of making a linked list class.  “Why am I supposed to be excited?”, I thought.  “At the end of the day this is basically an array, and I already have those.”  Rather than showing off nontrivial things you could do with C++, the example was about a trivial thing you couldn’t do with C++ without adding it to the language by hand.

In retrospect, these languages don’t look any less strange.  Now I’m used to hearing everything framed in terms of “APIs,” “information hiding,” “loose coupling” -- an aspiration to make the expectation of my young self, of a single stable floor extending everywhere, as close to a truth as possible.

[yahoodevelopers]

Bullet Updates - Windowing, Apache Pulsar PubSub, Configuration-based Data Ingestion, and More

By Akshay Sarma, Principal Engineer, Verizon Media & Brian Xiao, Software Engineer, Verizon Media

This is the first of an ongoing series of blog posts sharing releases and announcements for Bullet, an open-sourced lightweight, scalable, pluggable, multi-tenant query system.

Bullet allows you to query any data flowing through a streaming system without having to store it first through its UI or API. The queries are injected into the running system and have minimal overhead. Running hundreds of queries generally fit into the overhead of just reading the streaming data. Bullet requires running an instance of its backend on your data. This backend runs on common stream processing frameworks (Storm and Spark Streaming currently supported).

The data on which Bullet sits determines what it is used for. For example, our team runs an instance of Bullet on user engagement data (~1M events/sec) to let developers find their own events to validate their code that produces this data. We also use this instance to interactively explore data, throw up quick dashboards to monitor live releases, count unique users, debug issues, and more.

Since open sourcing Bullet in 2017, we’ve been hard at work adding many new features! We’ll highlight some of these here and continue sharing update posts for future releases.

Windowing

Bullet used to operate in a request-response fashion - you would submit a query and wait for the query to meet its termination conditions (usually duration) before receiving results. For short-lived queries, say, a few seconds, this was fine. But as we started fielding more interactive and iterative queries, waiting even a minute for results became too cumbersome.

Enter windowing! Bullet now supports time and record-based windowing. With time windowing, you can break up your query into chunks of time over its duration and retrieve results for each chunk.  For example, you can calculate the average of a field, and stream back results every second:

In the above example, the aggregation is operating on all the data since the beginning of the query, but you can also do aggregations on just the windows themselves. This is often called a Tumbling window:

With record windowing, you can get the intermediate aggregation for each record that matches your query (a Sliding window). Or you can do a Tumbling window on records rather than time. For example, you could get results back every three records:

Overlapping windows in other ways (Hopping windows) or windows that reset based on different criteria (Session windows, Cascading windows) are currently being worked on. Stay tuned!

Apache Pulsar support as a native PubSub

Bullet uses a PubSub (publish-subscribe) message queue to send queries and results between the Web Service and Backend. As with everything else in Bullet, the PubSub is pluggable. You can use your favorite pubsub by implementing a few interfaces if you don’t want to use the ones we provide. Until now, we’ve maintained and supported a REST-based PubSub and an Apache Kafka PubSub. Now we are excited to announce supporting Apache Pulsar as well! Bullet Pulsar will be useful to those users who want to use Pulsar as their underlying messaging service.

If you aren’t familiar with Pulsar, setting up a local standalone is very simple, and by default, any Pulsar topics written to will automatically be created. Setting up an instance of Bullet with Pulsar instead of REST or Kafka is just as easy. You can refer to our documentation for more details.

Plug your data into Bullet without code

While Bullet worked on any data source located in any persistence layer, you still had to implement an interface to connect your data source to the Backend and convert it into a record container format that Bullet understands. For instance, your data might be located in Kafka and be in the Avro format. If you were using Bullet on Storm, you would perhaps write a Storm Spout to read from Kafka, deserialize, and convert the Avro data into the Bullet record format. This was the only interface in Bullet that required our customers to write their own code. Not anymore! Bullet DSL is a text/configuration-based format for users to plug in their data to the Bullet Backend without having to write a single line of code.

Bullet DSL abstracts away the two major components for plugging data into the Bullet Backend. A Connector piece to read from arbitrary data-sources and a Converter piece to convert that read data into the Bullet record container. We currently support and maintain a few of these - Kafka and Pulsar for Connectors and Avro, Maps and arbitrary Java POJOs for Converters. The Converters understand typed data and can even do a bit of minor ETL (Extract, Transform and Load) if you need to change your data around before feeding it into Bullet. As always, the DSL components are pluggable and you can write your own (and contribute it back!) if you need one that we don’t support.

We appreciate your feedback and contributions! Explore Bullet on GitHub, use and help contribute to the project, and chat with us on Google Groups. To get started, try our Quickstarts on Spark or Storm to set up an instance of Bullet on some fake data and play around with it.

[webhawkstechnology-blog]

Why Ionic Hybrid network becoming more popular day by day

Introduction of Ionic Framework

Ionic is a complete open-source SDK for hybrid mobile app development created by Max Lynch, Ben Sperry and Adam Bradley of Drifty Co. in 2013. Ionic is world’s most popular cross platform mobile development technology. Basically it’s hybrid mobile app development framework. Using Apache Cordova, it can be easily run on mobiles. A big advantage of using Ionic is that the code base remains the same for all mobile platforms and the UI/UX looks like a native mobile platform. The good news is: if you can manage to create websites, you already know how to build mobile apps. Ionic Framework offers the best web and native app components for building highly interactive native and progressive web apps. It is the only mobile app stack which allows developers to design apps for all app stores and the mobile web, using an unique code base. Moreover, Ionic’s Platform Continuity guarantees your app will look superb on every single device. Ionic provides tools and services for developing hybrid mobile apps using Web technologies like CSS, HTML5, and Sass. Apps can be built with these Web technologies and then distributed through native app stores to be installed on devices by leveraging Cordova.

Benefits of Ionic Framework

Platform Independent Framework- Ionic can recognize the platform specific advanced CSS proportional to the native look and feel on different mobile operating systems. It reduces the requirement for code changing as it gives the codes of mobile-optimized HTML, JS, and CSS components. Apart from this, ionic integrates into Angular JS which becomes a robust structure making code excellent as well as more manageable. This empowers the Start-up entrepreneurs to come out with newer concepts at reduced budget.

Cross-Platform Mobile App Development with Ionic- Building an application without a moment's delay is essential, and it should be compatible with all mobile devices. However, it needs extremely limited use of time, assets and efforts, and helps in giving a unified look and feel. Besides, Ionic helps with building applications quickly and with expertise, and deploys standard tools with a solitary code base.

Default User Interface- Ionic has many default CSS and JS parts that cover the vast majority of the basic things you need to make a mobile application. . Apart from regular ones like buttons and navigation it also includes form inputs, lists, cards, sliding boxes and many more. These can be easily customized by adding CSS classes to the element. The default styles are basic, smooth, and you can without a doubt redo them by adding pre-defined CSS classes to the component.

Based on AngularJS- If you’ve worked upon Ionic, and then you would likely realize that it is developed on top of the Angular JS framework. The extensions to HTML's sentence structure offered by AngularJS are extremely useful for mobile app designers. The Ionic structure utilizes AngularJS to offer a bunch of center functionalities to the designer with the goal that they can incorporate alluring components into the application.  AngularJS is an ideal approach to make program based applications, while with the assistance of the Ionic structure, versatile designers can make hybrid applications and web applications.

Utilizes Cordova Plugins- Plugins play an essential part in Ionic application development. Modules are coded in JavaScript and come appended to the application. Ionic framework application development utilizes Cordova plugins to help designers in accessing different components of the versatile framework- for example, camera, GPS, and so on. According to your business and offered administrations, mobile app developers can utilize any of these modules to build their ideal mobile application.

There are a few good reasons to go with Ionic, depending on what you would be using it for:

1. Ionic use Angular’s MV* paradigm: If you are a web developer and want to be able to compete in the mobile space Ionic is great for you. Ionic uses HTML and CSS to lay out its views, so not only will you have all of the power of CSS transitions and canvas drawing, but you will also feel at home with the DOM. If you’ve ever used Angular in production, this will be doubly true for you, because the logic layers of Ionic use Angular’s MV* paradigm.

2.Desktop support: Ionic has added a flexible grid, and split-pane type features, allowing you to build mobile-first apps with responsive desktop layouts.

3.Open Web Standards: To paraphrase one of their founders, you’re betting on the open web, rather than getting stuck learning single-platform technologies that don’t carry over. (e.g. Learning CSS and DOM layouts versus Xcode’s autolayout)

4.Progressive Web Apps: This is a big trend on Google and Ionic’s radar, and it seems like Ionic is uniquely positioned to let you build app-class web experiences that can also be published in the App Store.

5.If you are bootstrapping a start-up and want to cut development time and cost by leveraging existing skill sets, Ionic is one of the best choices. Ionic creates apps for iOS, Android and Windows. It has default CSS that changes between versions for a Native experience. And all this can be done in JavaScript which is one of the most common programming languages known by developers now because of its ubiquity on the web. There are other frameworks around now that can achieve this in different languages, but most of them are not as popular or have as much support. So unless you have a specific reason you need to use python, Ruby, C++, Java etc. stick with Ionic or React Native in JavaScript or Xamarin in C#. Those are the most mature communities for cross-platform apps.

6. If you are new to web/mobile development the skills you will learn making things with Ionic will take you a lot further than what you will get with native. JavaScript is everywhere. It is more popular than Swift, and more importantly, it can be used for a lot more things. Java is really popular as well, but in my opinion, JavaScript seems to be slowly taking over Java’s position in the web development world. Companies that were built on java will stick around for a long time, but many new ones are being built on stuff like JavaScript, Ruby, Go and the like. And yes that list will be different in a few years, but Java will not be making it back on, and JavaScript will be the longest lasting one that is around for now.

7.Ionic Community: There’s a community of over 30,000 members on the Ionic forum, an active Slack Channel, and Ionic is the 45th or so most popular/starred repo on Github.

How to Install Ionic Framework

Make sure you have an up-to-date version of Node.js installed on your machine. If you don't have Node.js installed.

Open the command prompt and verify the Node.js version by using the command node -v.

To install Cordova and Ionic, use - npm install -g cordova ionic.

Make sure to install the latest version of JDK and Android Studio IDE for Android development.

To create a new project, use - ionic start projectname template.

Inside the project folder, you can add Android/iOS platform based on your development using the command - ionic cordova platform add android.

After these code changes are done, you can generate the required .apk file with the command - ionic cordova build android.

Once the .apk file is generated successfully, you deploy the file on a real device and do the testing, or you can test it as a web application using a browser.

To run it in a browser, use - ionic serve.

To run it on a device, use - ionic Cordova run android -device.

Finally, play with Ionic!

Comparison between Ionic Framework to Others Framework like PhoneGap

Ionic Framework-

Open source

 It’s Javascript, HTML and CSS

 Cordova is an engine which runs PhoneGap

UI Components is awesome

Application type: Hybrid

Supported Platforms- Android, IOS, Windows, BlackBerry

Enable features, such as push notifications, A/B testing, analytics, Code deploys and Automated builds.

PhoneGap-

Open source

It’s Javascript, HTML and CSS

Cordova is an engine which runs Ionic

Lack of pre-built UI widgets

Application type: Native

Supported Platforms- Apple IOS , Bada,  BlackBerry, Firefox OS, Google Android, LG webOS, Micresoft Windows Phone (7 and 8), Nokia Symbian OS, Tizen (SDK 2.x) and Ubuntu Touch.

Enable features, Such as internet connectivity validation, Animations, List view, Facebook SDK support, Push Notifications, Device Detection, and Geolocation. According to Google Trends Ionic has gained its popularity day by day till 2018 where as other Frameworks fall down compared. To get more details about this technologies you can contact us through our website www.webhawksindia.com

[yourfuriousbouquetpoetryblr-blog]

Advance Java Courses in Pune

Advance courses help in gaining some extra skill sets and discover new things in any particular domain. NIIT helps students in developing such skills and making them industrial ready. NIIT offers some of thebest Advance Java courses in Pune. Some of which are mentioned below.

Advanced Java Course in Pune

Java, a standout amongst the most prevalent programming being used, especially for customer server web applications, with an announced 9 million engineers. Propelled Java modules are the most utilized instruments to advertising today. They are generally utilized as a part of the industry and consequently, information of these modules enable the possibility to discover steady employment in the showcase. Propelled Java modules are exceptionally looked for after ability as these aptitudes are difficult to discover among general applicants.

Advanced Java Course Covers

HTML, CSS & Javascript Overview

HTML Basics Information

HTML Elements

CSS Introduction

CSS Syntax & Selectors

JavaScript Overview

Bootstrap Overview

Java MVC Architecture

Three-tier architecture

Introduction to MVC

 MVC Architecture

Advantages of MVC

 Building pages with MVC

Servlets

What is a web application?

What is a Servlet?

Advantages of Servlet

Servlet Class

Servlet Lifecycle

Servlet Context Interface

Advantages of Servlet Context

Session management

Session Tracking Techniques ◦Cookies

Hidden field

URL Rewriting

HTTPSession

Building the first Servlet

Deploying the Servlet

Servlet examples

       JSP

 Introduction of JSP

JSP Architecture

 JSP Processing

 JSP Tag library

 Core Tags

 JSP Standard Tags

 JSP Page Life Cycle

 Creating the first Dynamic web page using JSP

Hibernate

Introduction to Hibernate

Hibernate v/s JDBC

what is Object Relational Mapping

Hibernate Features

Application Architecture

Persistent Classes

Object States ◦Transient State

Persistent State

Detached State

Rules of Persistent Classes

Mapping Collections

Hibernate Mapping File Elements

Types of Mapping ◦One-to-one

One-to-many mapping

Many – one mapping

Many – to – many mapping

Hibernate Query Language

Basic HQL Operations

Advantages of HQL

Caching and Transactions

Types Of Cache

Hibernate Transaction Management

Transaction Interface In Hibernate

Hibernate with Web Applications

Advanced Selenium course in Pune

Selenium robotizes programs. Principally, it is for mechanizing web applications for testing purposes, yet is surely not constrained to only that. Online organization assignments can likewise be robotized. Selenium has the help of a portion of the biggest merchants who have found a way to make Selenium a local piece of their program. It is additionally the centre innovation in endless other program mechanization instruments, APIs and structures.

Selenium has turned out to be exceptionally prevalent as an Automation device in the IT business as it is a freeware and extremely convenient. Its prominence has developed monstrously in the most recent couple of years. This course additionally acquaints understudies with Cucumber – a conduct was driven improvement instrument that is quickly increasing colossal notoriety among the testing network. We prescribe this course to everybody in the product testing vertical.

Selenium Course Covers

Introduction

Overview of Selenium

Advantages of Selenium  

The Selenium Suite

Inroduction to Selenium IDE

Selenium Remote Control

Selenium Grid

 Architecture of Selenium Grid

the Hub & the Nodes

Basics of Web Driver

Setting up the environment

Configure Fire Bug & Fire Path

Advanced Selenium Web-driver

TestNG

Automation Framework

Advanced Automation Framework  

Core Java Overview

 Why Java for Selenium

First Java program

Datatypes in Java

Variables & Constants

 Control-flow statements

 Operators

 Arrays

 Loops

 Classes and Objects

 Class Constructors

 Class program in Java

 Inheritance & Polymorphic

 Introduction to Interface

 Collection hierarchy

Selenium IDE

 Introduction to Selenium IDE

Features of Selenium IDE

 Installing Selenium IDE

 IDE Options

 Building test cases

 Running Test Cases

 IDE Script Debugging

 Writing a Test Suite

 Using Locators in Selenium

 Verification points in IDE

 Working with regular expressions

 User extensions

 Execute scripts across browsers

Selenium Web Driver

Introduction

How Selenium Web Driver Works

Configuring Selenium Web Driver With Eclipse

Selenium RC vs Web Driver

Set Up Web Driver Client

Programming your tests in Web Driver

Debugging Web Driver test cases

Troubleshooting

Testing HTTPS and Security Pop-ups

Running Test on GeckoDriver

Executing and Debugging tests in browsers ◦IE

Chrome

Firefox

Desired Capabilities in Selenium WebDriver

 Session Handling

Handle Alerts and Multiple Windows using WebDriver

 Uploading & Downloading using WebDriver

Accessing Forms & GUI Objects

Text box interaction

Radio button interaction

Handling Check boxes with Web Driver API

Handling static drop downs

Handling dynamic drop downs

Drag & Drop

 Keyboard Interaction

 Mouse Interaction

 Multi select

Selenese Commands

Actions

Accessors

Assertions

Using Locators in Selenium ◦Locating by ID

Locating by Name & using filters

Locating by Link Text

Locating by CSS Selector

Locating by DOM

Synchronization in WebDriver

What is an implicit wait?

What is an explicit wait?

AJAX Calls in Selenium ◦ What is AJAX

Handling AJAX Calls

Challenges

Accessing Web Tables

what is a Web Table?

Static Tables

Dynamic Tables

Locating Web Table elements

Fetching number of rows and columns

Fetching cell value

TestNG Framework

Introduction

TestNG Features

Install and set up TestNG environment

First Test Case with TestNG

TestNG annotations

Junit vs TestNG

TestNG Test Suite

Annotations, Groups & DependOn

TestNG – Ignore Test

Group Test in TestNG ◦Metagroups

Exclusion Groups

Exception Test

Dependency Test

TestNG Parameters & Data Provider

TestNG Reporters & Asserts

Test Cases Prioritizing & Sequencing

TestNG DataProvider with Excel

Multi Browser & Parallel Testing

Test Design Techniques

Page Object Model ◦Why POM?

What is POM?

POM Benefits

Parameterizing using Excel

Log4j Logging

Exception Handling

Capture Screenshots

Cookie Handling in Selenium

Why handle cookies

Retrieving, adding and deleting cookies

Storing a cookie

Using stored cookie

Debugging

what are Breakpoints

Implementation of Breakpoints

what is a Start point

Implementation of Startpoints

Xpath Functions

Contains

Sibling

Ancestor

Selenium Frameworks

Data-Driven Test Framework

Keyword Driven Test Framework

Hybrid Test Framework

These advanced courses provide you with some extra knowledge of different things around which can guarantee you a great success. These advanced courses cover many important things and help in developing extra skills. NIIT provides the best Java training and advanced Java training courses in Punewith the help of trained staff and professionals.

Visit us at : NIIT Pune

[vervainvalkyrie-blog]

How to create Batch file to delete files

Perhaps making batch a standard part of Java EE 7 will give large financial services companies the confidence to migrate their COBOL batch processing to Java. Batch is essential for these companies - as highlighted by a recent case at the RBS bank. I do not think the inclusion of batch in Java EE 7 means that such companies are planning to migrate their batch processes to Java immediately, but that will probably make the discussion progress. The most interesting part of JSR-352 is undoubtedly Chunk Processing.

This is where a batch processing step processes data, eg. millions of records from a database cursor. Logic is applied to each record, and its transformed output is written in pieces (in a file, a database, etc.). Basically, Chunk treatment is where the real work arrives! Glassfish 4 will support JSR-352 when it is released, and Maven Central will host jars for the Java EE API. Before its official release, I use nighttime builds and snapshots. The table below shows where to find these objects. The specification is also referenced, which is clearly written and easy to follow: JSR 352 Final SpecGlassfish 4 night builds - I used the build 90: glassfish-4.0-b90 -05_18_2013.zip I created an instance of the Java EE 7 WAR Array using the following Maven Command I use Intellij to develop on the iMac, but any IDE or OS will be fine.

I also use a version 7 of the JDK. Next, you need to add the Java Batch dependency to pom.xml: A batch job is composed of steps. Some will be song steps and others will be Batchlet steps. The jobs are defined in XML and must be located inside: I created my Batchlet by implementing the javax.batch.api.Batchlet interface. I can inject JobContext and StepContext instances using CDI - these instances give me information about the entire job and the current step. To follow the code example above, you need to know what an executionId is. There are many identifiers in Java Batch that can be summarized as follows: When a new job is started, an instance ID is assigned to it when the new job is executed. it receives an execution ID. A job is executed when it is first started or when it is restarted. If a job fails and is restarted, it receives a new execution ID as part of a job run.

Each step is assigned to a new stepExecutionId - this is only assigned when the step begins to run. If a step is run more than once because of the reboots, a new stepExecutionId On Glassfish attribute is incremented by 0. I added a logic that raises an exception unchecked when the executionId parameter is even. This means that the execution should fail. If the job is restarted, it will be assigned another run-time ID that should be an odd number (because I'm the only operator using my Glassfish server) so it should succeed. To start jobs and restart jobs, you must interact programmatically with JobOperator, available through the BatchRuntime class.

I've added simple methods to start, restart, and get information about an execution to a session bean without a condition: Note that you can give properties to a work, if you want to provide dynamic parameters. Now, I create a simple servlet to start my work, restart failed jobs, and view job details. This code would (hopefully) not benefit from any price - but it shows the possibilities for dynamic batch job scheduling through the JobOperator instance: The Glassfish Administration Console has a section for displaying the batch work. However, it is a read-only view. It is likely that other Java EE application servers will provideDard interface to submit, restart and monitor jobs.

Many large companies use external planners to start the work - so there is a lot of flexibility for the operational side. Here is a screenshot of the Batch Monitoring section of the Glassfish console: Anyway, deploy the WAR file to Glassfish (Intellij can do that as an exploded WAR for you). Then interact with it using these URLs: Start: http: // localhost: 8080 / planetjones-java-batch-example-1.0-SNAPSHOT / run_batch_job? Action = STARTRestart: http: // localhost: 8080 / planetjones-java-batch-example-1.0-SNAPSHOT / run_batch_job? action = RESTART  u0026 executionId = XXView: http: // localhost: 8080 / planetjones-java-batch-example-1.0-SNAPSHOT / run_batch_job? action = VIEW  u0026 executionId = XX Let's go over a simple case where I start a job that is assigned to the same execution date executionId:

So a new job instance was created and she received an execution ID of 74.Now I click on the link See the details: Because my code returns the exception NullPointerException the execution has © Shua. Now, I can restart the job by clicking on the restart link: The Job is run again so that it gets a new run ID of 75. It's is an odd number, so I'm waiting for my Batchlet to succeed now. Let's look at the details again: The work instance has now been successfully FINDED. Note the instanceId of 58 - this remains the same on the restarts because it is the Job instanceId - which is only assigned when JobOperator.start is called. The exitStatus has the same value as the jobStatus because I did not specify an existing state by calling:

SummaryI hope that after reading this, you have a great idea of JSR-352. Over the next few months, I'll be experimenting a lot more - steps, checkpoints, transactions and partitions. The source code for this example is on github. I would love to hear your comments or suggestions. I hope that after reading this, you have a general idea of ??JSR-352. Over the next few months, I'll be experimenting a lot more - steps, checkpoints, transactions and partitions. The source code for this example is on github. I would love to hear your comments or suggestions. This article summarizes many of my favorite Ant tips or best practices. Many have been inspired by mistakes made on previous projects, or

[acdemic]

hey hello hi!!! it’s been ages (6 months?!) since my last masterpost, and i’ve been seeing so many great educational apps on the google play store. so here’s a list of some educational smartphone apps that you should check out! 

disclaimer: i have not used most of these applications (i generally don’t use study or even productivity apps), so i’m recommending them based on reviews!

general education

curiosity [ play store, free ] [ apple, free ] curiosity is a super cool app that’s all about learning new quirky facts! every 24 hours new content is released, including mind-blowing science, history and technology facts. it’s like having the best museum and the most fascinating library at your disposal.

coursera [ play store, free ] [ apple, free ] with coursera, you can access more than 1,000 courses and specializations developed by 140+ of the best colleges and universities in the world, and master subjects from python programming and data science to photography and music.

edx [ play store, free ] [ apple, free ] edx provides free online courses from the world’s best universities and institutions. there are so many topics to discover, including computer science, engineering, history, psychology, nutrition, big data, statistics and hundreds more. with edx, you have the flexibility to learn on your schedule. it is free education, when and where you want it.

khan academy [ play store, free ] [ apple, free ] khan academy allows you to learn (almost) anything for free. browse over 10,000 videos and explanations at your fingertips in math, science, economics, history, and much, much more. sharpen your skills with over 40,000 interactive practice questions with instant feedback and step-by-step hints. khan academy is a wealth of resources and it’s all free!  note: i really really recommend khan academy! it is super helpful and there’s also the free sat prep (and the upcoming free lsat prep for people interested in law school)!!

udemy [ play store, free ] [ apple, free ] udemy is your place to learn real world skills online. with over 32,000 online courses and tutorials, offered in more than 80 languages, you can choose from a wide range of topics to inspire creativity, hone your skills, be your own boss, and more. courses in everything from programming, it & software, business, marketing and entrepreneurship, health, design, languages, music, and much more.

goodwall [ play store, free ] [ apple, free ] goodwall is basically a social network for students - you can share your skills and achievements and win scholarships (and even be recognized by colleges and universities!) when you join, you are eligible for a $500 weekly new student award, in addition to the $1000 student of the month scholarship. people seem to think that it’s a great way to connect to other motivated students throughout the world (obviously the studyblr community is The Best ;) but here’s an awesome alternative!)

schoold [ play store, free ] [ apple, free ] schoold is a super cool app that allows you to find information on 3000+ colleges and 25k+ scholarships by major and admission chance. It also offers free college counseling (advice on applications, financial aid, majors, and careers) and future planning tools! 

science

phywiz [ play store, free ] need help with your physics homework? phywiz provides step by step solutions for questions in over 30 physics topics, including kinematics, forces, gravity, and quantum physics. ask phywiz a question like "if mass is 6 and velocity is 7, what is momentum?" and get your answer immediately. many of the positive reviews call it “one of the best apps i’ve ever used”.

little alchemy [ play store, free ] [ apple, free ] [ website ] this is such a cute game where you start with four elements and combine them to create interesting, fun and surprising items. it’s definitely addictive!

chemistry quiz [ play store, free ]  500+ quiz questions covering the elements, the periodic table, bonding and interactions, matter and mixtures, chemical reactions, acids and bases, organic chemistry, nuclear chemistry, history of chemistry, and labs.

skyview [ play store, free ] [ apple, free ] a beautiful and intuitive stargazing app that uses your camera to precisely spot and identify celestial objects in sky, day or night. it’s a great app for people who love space but don’t want to purchase fancy equipment to enjoy its beauty. you can see what each star and planet is and where it’s going. be sure to calibrate it first!

coding

encode [ play store, free ] encode is packed with bite-sized coding lessons that combine succinct explanations and clear real-code examples. it is a wonderful way for beginners to start programming.

sololearn has a ton of apps that are all about learning to code: java, c#, python, javascript, c++, etc.!

programming hub [ play store, free ] [ apple, free ] your one-stop solution to learn all of the top programming languages! you can learn c, c++, java, html, javascript, r, css, vb.net, c#, python 2.7, python 3, linux shell scripting, swift, sql, jquery, and assembly 8086. there are over 1800+ pre-compiled programs with output for practice and learning. a new feature seems to be the programming-related interview questions that can help you prepare for a job interview!

codenza [ play store, free ] codenza is a dictionary of 3000+ ready-made computer programs: the ultimate coding encyclopedia for university curriculum. codenza covers everything from computer graphs to artificial intelligence! note: codenza does not teach programming. it only provides programs and offers explanations for the more complex programs.

math

cymath [ play store, free ] [ apple, free ] [ website ] stuck on a math problem? cymath allows you to enter your problem, and helps you to solve it step-by-step. topics include pre-algebra, algebra (equation solving, factoring, logarithms, exponents, complex numbers, quadratic equations, trigonometry, partial fraction, polynomial division, etc.), and calculus (product rule, quotient rule, chain rule, u-substitution, integration by parts, integration by partial fraction, trigonometric substitution, rationalizing substitution, etc.)

photomath [ play store, free ] [ apple, free ] math is full of symbols that we are inconvenient to type, and photomath solves that problem: simply point your camera toward a math problem and photomath will show the result with detailed step-by-step instructions. there is a new feature of handwriting recognition as well!

mathway [ play store, free ] [ apple, free ] [ website ] yet another math problem solver! this one allows you to type your problem or scan a picture of your problem. mathway covers basic math, pre-algebra, algebra, trigonometry, precalculus, calculus, statistics, finite math, linear algebra, chemistry, and graphing. one flaw seems to be that you need to be online for it to work, but otherwise, it’s a fantastic tool!

history

history timeline [ play store, free ] okay, woah. this is a detailed timeline of world history with thousands of entries! it includes world history (events, nations, leaders, and wars) AND history of science, art, literature, music, and philosophy.

today in history [ play store, free ] [ similar apple, free ] for the history enthusiast who wants to learn something new every day: today in history tells you what historical events happened on that day! it works offline and you can choose from over 50 languages.

ancient history encyclopedia [ play store, free ] [ website ] thousands of informative and reliable articles on ancient history. articles are written with students in mind and are carefully reviewed to ensure accuracy, and are easy to read. 

languages

duolingo [ play store, free ] [ apple, free ] one of the leading language learning apps, duolingo gives you the ability to learn english, spanish, french, german, italian, portuguese, dutch, irish, danish, swedish, russian, ukrainian, esperanto, polish, and turkish for free. you can practice your speaking, reading, listening, and writing skills and improve your vocabulary and grammar.

productivity

forest [ play store, free ] [ apple, $1.99 ] forest is a cute productivity app that keeps you off of your phone! you set a certain amount of time, and during that time a tree ‘grows’, but if you use your phone before the times up, the tree dies. :( 

habitica [ play store, free ] [ apple, free ] have you heard of ‘gamification’? habitica is an app that allows you to gamify your tasks! check off tasks to level up your avatar and unlock features such as armor, pets, skills, and even quests! it’s a great way to have fun while being productive! note: habitica is another one of these apps that i’ve actually attempted to use - it is super cute and it’s definitely a great way to stay on track!

timetune [ play store, free ] timetune is a great app for people who have established a daily routine or would like to. you can set up a routine (or multiple routines) and add your daily tasks. it can be used as a daily task reminder, student calendar, timetable planner, routine schedule organizer, routine optimizer, habit creation tool, daily time manager, or daily planner.

ike [ play store, free ]  ike is a to-do list that uses eisenhower’s priority matrix. you can organize your tasks by importance and urgency, and add all sorts of details such as due dates and location reminders.

habithub [ play store, free ] habithub is based on seinfeld’s productivity secret, which involves building long streaks of days that will motivate you to keep moving forward. (snapchat for habits? i think yes!) it includes a full calendar view for every habit, reminders, compatibility with smartwatches, the option to write notes every day, more flexible goals, the ability to categorize your habits, and graphs that show you how you’re doing. the interface looks beautiful and people seem to love the abundance of settings.

pomotodo [ play store, free ] [ apple, free ] there is an abundance of pomodoro timers in the app store, and pomotodo is one of them! pomotodo easily syncs across platforms, has advanced to-do list options, the ability to customize pomo and break times, offers background noise to keep you focused, and sends you weekly email reports to help you track your productivity. i don’t want to list a ton pomodoro apps in this masterpost, but here are the many options on google play store!

alright, that’s all i’ve got for you today !! i hope that this was helpful, and feel free to send me an ask with any questions, suggestions for future masterposts, or your recommendations for other study apps/websites!! :) have a great day!

icon by madebyoliver

[enfp-thoughts]

ENFPs and Coding!

shoutout to @riipeplum​ for this!

Why should ENFPs learn to code?

universal application: you can code apps and websites for anything! finance, environment, art! coding is not restricted to science-y stuff and what matters is what you bring to the table

outlet for creativity: think of code as paint and the world as your canvas You are only restricted by your imagination!

impact, impact, impact: we live in the Era of the Computer and we are more connected than ever! everything you do has more global impact than you can imagine!

no two days are the same: we’re always on our toes, always learning because the world we live in is constantly changing! 

Being a programmer is the ideal career for ENFPs because it satisfies all our needs for creativity, spontaneity, helping others and doing important things that match with our values

BUT I cannot stress one thing enough: coding has universal application so whether  you’re a counsellor, an environmentalist, a musician, a law student, a waiter or a bartender please consider learning to code as well. what you bring to the table matters because your experience helps you recognize and solve problems that a stereotypical engineer might not even understand (examples: fire chief makes app that helps off-duty trained specialists know if someone just has a cardiac arrest near them)

So, where do you start?

Start with learning how to make ANDROID APPS!

The following is a list of courses that need be taken after one after another and GUESS WHO IS TEACHING THEM?

You’ll be learning how to make apps from the best! And keep in mind: NO fancy math experience and NO prior coding experience needed! Heck, even middle schoolers can start learning from this! and its FREE (ignore the offer to pay to get a Nanodegree, that’s not needed)

Step 1: Android Basics:

Android Basics: User Interface 

Android Basics: User Input 

Android Basics: Multiple App Screens 

Android Basics: Networking 

Android Basics: Data Storage 

Step 2: UX Design for Mobile Developers 

Step 3: Git and Github 

Step 4: Developing Android Apps 

Step 5:  Add services to Google Apps:

Location and Activity

Google Analytics and Tag Manager

Google Maps

Display Ads with adMob

Step 6:  Advanced Android  

Step 7: Android Performance 

Step 8: Gradle for Android and Java 

Step 9: Firebase in a Weekend 

Step 10: Material Design 

Step 11: Apps that run everywhere:

TV and Google Cast 

Android Wear 

Cars 

Message me know if any of the links don’t work! I’ll make a more general post that can be shared with the general public :D

Happy coding!