Sharing Tech Knowledge

Java Starter Kit #1 Overview In Java POV, the collection framework gives us a wide range of data structures to choose from. Among them, one of the legacies yet widely used data structure is Linked List . The major Pros of Linked List come into play when the data structures need to store a huge amount of values or when the length is not definite. This is the time when this implementation of collection shines. The insertion and deletion of elements from LL are faster than other data structures.  Unlike array which again is a popular implementation of List interface in Java, LL doesn't store data in a continuous manner. Some other pros include: - Zero Memory Wastage: when an element is inserted or deleted, the allocation of memory is dynamic. When removed the previously-stored node reference is removed as hence GC clears it. And when inserted it allocates a new node when it is inserted and doesn't pre-occupy any space in the heap at the initialization of LL. Linked Lis

Introduction Shipping your product just after you have committed your changes in code. Automatic Build, Running Test Scripts, Release to your artifactory. Ya  Continous Integration  is the exact thing I am talking about. Jenkins is the most popular CI-CD tool available out in the market nowadays. As always to kick-start a new tool the official documentation is good but not the ideal solution as it can be a bit high level. Jenkins has its official tutorial:  Jenkins Tutorial Recommendation Tutorial Articles:   Jenkins Tutorials Point Tutorial Overview Installation Download Jenkins from its official website: Jenkins Download . Download the corresponding installer for your operating system. Install the installer via the wizard and do the required steps on wizard-like setting the default port, admin username, and password. My personal suggestion is to go with Stable-LTS (Long Term Support) version. Installation is an easy task, after installation, the Jenkins server will start at localhost

Well, I am a big fan of documentation and the reason for the same is not because I know a lot, the reason for the same is that I don't know a lot! Fact ! There are a lot of misconceptions that Agile Methodology is against Documentation. Working software over comprehensive documentation The above statement in Agile Manifesto states the importance of documentation in a project, but the real interception of the statement is often described incorrectly. It means you should create documentation that provides value and at the same time does not hinder the team’s progress. Agile document requirements are user stories, which are sufficient for a software developer to begin the task of building a new function. Major advanatages of documentations are: A single source of truth saves time and energy. Determine what others need to know about the product/services provided by us. The hiring and onboarding process can be easier. Enables Revision Control and provides a proper process for updates. S

 Oracle provides free training with Badges. Visit Oracle University Learning site for this awesome free Explorer Training. DevOps Explorer Badge So how to earn this Explorer Digitial Badge in your field of expert from Oracle University for FREE. Steps: Create an account at Oracle University  here . Goto the  Application Development Learning Subscription page. Filter Down: Explorer Training   Select the course you could like to explore Complete the learning path and you have an assessment at last. On clearing the assessment, you will complete the course and earn the badge. You can share the Digitial Badge on LinkedIn, Twitter directly from the Oracle site. Be an Explorer and Keep Learning.

Early this week Oracle announced the next version of Java Java  16 .(March 2021) While people (mainly developers) have not been a huge fan of java's version number recently and obviously the reason for the same is the rise of OpenJDK. Now the million dollar question! Should I use OpenJDK or Oracle JDK?? As everything else in this earth, this too has 2 sides while choosing which JDK will benefit you. And there is no correct or best answer for this choice !! Oracle has been releasing a newer version of JDK every 6 months ( previously it was every 2 years till JDK 10 ) and LTS (Long Term Support) version is not as frequently as this release cycle (3 years release cycle). As defined by Oracle the last "free" version is still JDK 8 , that too will no more be updated ( officially stopped by December 2020). While there is no doubt why OPENJDK is rising! It's FREE & OPEN . OpenJDK too have a release of 6 months.  One major reason for this rise is after the announcement of

This article is all about the tools that can help you to get more insight into your project when you are trying to explore the project on your own. These tools can help you to find the code flows even in times when the source code is not available, particularly focusing on Java Based applications. Wireshark Struggling to find the protocol used behind your application, then Wireshark will be the perfect tool to use, it's so useful that you can find the communication protocol on every single request your application sends even with the packet details. Ref: Wire Shark Offical Site . Java Decompiler Don't have the source but still want to explore the code behind the java application, Java Decompiler is there for your help. Say your code is deployed as war or jar, the compiled code can be viewed as readable code using this tool. Ref: JAD Offical Site . VisualVM Threads! A nightmare for Java Developers, VisualVM provides you a simpler view of your application and the details of each

Well, the title is not just clickbait! it's related to the article below. Can the rivals (Java and Python) work together! Why Combing two languages in the same program is not a strange manifestation, yet not common. Both Java and Python are object-oriented languages, where the former is a system programming language and the latter is a scripting language which makes them quite a good pair. My initial thoughts on the integration of two languages in the same program were when I considered rewriting those components where performance is critical for the application or when quick development was required. One of the key reasons for using Python together with Java is its ease to use and learn feature, which is an added value for experimental works. For instance, while dealing with text parsing and manipulation, Python would be a great choice once we have development time as a factor of consideration, or considering the upcoming of AI, both these languages are offering tons of libraries

Writing your own code or copying others' code? It's always the mix and match of these two methods Developers use! Well, it's not a crime to copy the code from StackOverflow or other forums and trying to implement an idea in your project. To get the best out of it, it's always best to understand the code that you see and try to implement it by understanding your requirements rather than blindly following it. Not always you will have the time and resources to start the code from scratch, and obviously, your first attempt to code logic will be the most effective. Accepting these facts, copying code is not such a bad idea, or at least getting inspiration from code. Cheatsheets are often helping hands for developers, and as the name says it's not "for cheating" but a one-stop for the commonly used commands and methodologies. One such cheatsheet repo that I found in GitHub is Cheatsheets  which is an awesome collection of tons for sheets.

"Debugger" Java Developer logger.info( " inside json parser " + json.toString()); System . out .println( "response " +gson.toJson(reponse)); . . . . Printing tons of sysout onto your console and checking the values of various attributes to resolve certain bugs ?! Sounds familiar!  Debugging is the perfect choice in those situations. Not always we can fix the issues and fixes by just checking the logs or by going through the conventional ways. That's where debugging can give you an extra hand. Choosing the right IDE which helps you to easily enable debugging and connect to your application is key. Different IDEs have different ways to enable debuggers.  For example: enabling debugging in Eclipse to debug an application that runs on Tomcat is quite different from an in-house application. Reference: here JPDA : Java Platform Debugger Architecture  Even when your target application is not hosted in your local or if the target application hosted system doe

Why Start Blogging about things we know or learned? Have you tried to learn a new topic, say a new language or a new framework, and then try writing about it? Yes, now you know the real pain of it. While teaching your colleagues or while blogging on a topic, one has to go in-depth to answer the WHYs. " Writing is an exploration. You start from nothing and learn as you go. " – E.L. Doctorow, American writer, novelist  Sharing helps you to find and fix the blind spots in your understanding, which in turn improves us. Hmm... so blogging is not just sharing your knowledge, it's also improving yours too. Maybe initially it's just as useful as documentation, but it will change. When we start blogging and share our knowledge, not always things get applaud, especially when they reach a greater audience or a community. And these will surely will be stepping stones. Blogging options are in many, now just Blogger by Google. Github can be a good or perhaps the best space for tech

Hello! I'm Leo Coding  💻   👾  | Developer  🎯   🦾  | Learner  🔭   📑  | Explorer  🛰   👨‍🚀 Hi All    😄 , I'm a developer with extensive experience in Java, J2EE-based systems development, which includes System Analysis, System Designing, Programming, Debugging, Defect fixing, Testing, Application Performance Analysis, and Deployment. Also experienced in data structures, Algorithms, and design patterns. This blog is all about sharing my knowledge on the topics I explored.  Visit my GitHub for exploring  🧭    my tech hobbies. To know more visit my website here . Leo K A Java Application Engineer Phone: +91 9995992755  Email: leo.ka1993@gmail.com