9 Maven Concepts and Tools Every Java Developers Should Know

The Apache Maven is an essential tool for Java developers. It makes their life easy by allowing them to create a Java project faster by using a standard directory structure. It also helps them to download project dependency automatically. Not only that, but Maven also downloads transitive dependencies that relieve Java developers from the big headache of keep check of different versions of dependent libraries. For example, if your application is dependent on the Spring framework, but Spring is dependent on Log4j then you also need to download the correct version of Log4j JAR files for the Spring MVC framework, Maven does this automatically for you.

Where and How to download Spring Framework JAR file (Spring 5.0 or Spring 4.0) without Maven, Gradle

One of the easiest and oldest ways to run a Java program which depends on an external library or framework is to download dependency JAR files, put them on the classpath and then run the program by creating a Main class with the main() method. This is simple but not as easy as you think, there are many challenges down the road e.g. you need to find the right version of JAR files and their dependencies e.g. Spring might have a dependency on other third-party libraries like Log4j. So, when the build tool like Maven and Gradle comes, everybody stopped downloading the JAR file manually.

Tibco Tutorial : Http Interface for Tibco RV Issues Troubleshooting and TIBCO RV Alternatives

This is another post of my tibco tutorial series , if you want to read more about tibco rv or tibco ems please read there. in this post I am sharing you great tool to solve tibco rv related problems and a great interface to analyze your Tibco RVD activities. until i know this I mostly used netstat command to figure out which topics are subscribed by my tibco RVD but after since I know about this I had helped me a lot.

FIX protocol Tutorial: Futures and Options

Hello guys, its been a long time since I shared any FIX protocol tutorial, I think almost 12 years but today is the day. If you are using FIX Protocol to create derivative trading systems in Java and want to learn about Futures, Options and how they are supported in FIX Protocol then you have come to the right place. In the past, I have shared FIX Protocol tutorials as well as many FIX Protocol questions and in this article, I will talk about Futures, Options and how FXI Protocol support their trading. The FIX Protocol, widely used in financial markets, plays a crucial role in electronic trading, including futures and options. Futures and options are derivatives that enable traders and investors to speculate on the price movement of various financial instruments. This tutorial will provide a comprehensive overview of futures and options trading and how the FIX Protocol supports these activities.

What is Atomic Operation and Variable in Java? AtomicInteger Counter Example

Hello guys, if you're wondering what is atomic operator in Java and how Atomic variable works then you have come to the right place. Earlier, I have shared difference between atomic, volatile and synchronized in Java and in this article, I will explain What is Atomic operator in Java, What are atomic variables and how to use them. In Java, the reading and writing of 32-bit or smaller quantities are guaranteed to be atomic. By atomic we mean each action takes place in one step and cannot be interrupted. Thus, when we have multithreaded applications, the read and write operations are thread-safe and need not be made synchronized.

Top 12 Locking, Synchronization and Multithreading Interview Questions for 5 to 7 Years Experienced Java Programmers

Hello guys, if you are an experienced Java developer say 3 to 5 years or 5 to 7 years experience and  preparing for Java Interviews then you very well know that Locking, Synchronization, ConcurrentHashMap, volatile and atomic, compare and swap (CAS), Executor Service, Stream API, and Multithreading in general are quite important and as an experienced Java developer you should be ready for them. In the past, I have shared 50+ Java Multithreading questions, 12 concurrency questions, 21 HashMap questions, and 10 ConcurrentHashMap questions and in this article, I am going to share 10 of my favorite question on Locking, Synchronization and Inter thread communication in Java. If you have been doing Java Interviews then its highly likely that you have already seen this problem but if you haven't you should definitely prepare them.

What is happens-before in Java Concurrency? An example

A couple of days ago, one of my readers messaged me on LinkedIn about a Java interview question he has recently faced - what is the happens-before relationship in Java concurrency? What is the benefit of it, and how exactly it works? He kind of has some ideas about that its related to the Java Memory Model and provides some sort of visibility guaranteed but couldn't explain with conviction to his interviewer, particularly with a code example and was a bit disappointed. He then asked me if I can write an article about it. I said you should have read the Java concurrency in Practice book or join the Java Concurrency in Practice Bundle course by Heinz Kabutz before the interview, that would have helped, but nonetheless, I liked the idea to just provide a quick overview of what is the happens-before relationship between threads in Java.

Top 15 Java Multithreading, Concurrency Interview Questions Answers asked in Investment banks

Multi-threading and concurrency questions are an essential part of any Java interview. If you are going for any Java interview on any Investment bank like Barclays, Citibank, Morgan Stanley, etc for the Cash Equities Front Office Java Developer position, you can expect a lot of multi-threading interview questions on your way. Multi-threading and concurrency are favorite topics on Investment banking interviews,  especially on electronic trading development jobs and they grill candidate on many tricky java thread interview questions. They just want to ensure that the guy has a solid knowledge of multi-threading and concurrent programming in Java because most of them are in the business of performance which provides them a competitive advantage and it's hard to write correct and robust concurrent code.

How to avoid deadlock in Java? Example Tutorial and Tips

How to avoid deadlock in Java? Is one of the popular Java interview question and flavor of the season for multi-threading, asked mostly at a senior level with lots of follow up questions. Even though the problem looks very basic but most of the Java developers get stuck once you start going deep. Interview questions start with, "What is a deadlock?" The answer is simple when two or more threads are waiting for each other to release the resource they need (lock) and get stuck for infinite time, the situation is called deadlock. It will only happen in the case of multitasking or multi-threading.

Top 50 Java Thread and Concurrency Interview Questions Answers for 2 to 5 Years Experienced

You go to any Java interview, senior or junior, experience or freshers,  you are bound to see a couple of questions from the thread, concurrency, and multi-threading. In fact, this built-in concurrency support is one of the strongest points of the Java programming language and helped it to gain popularity among the enterprise world and programmers equally. Most of the lucrative Java developer position demands excellent core Java multi-threading skills and experience in developing, debugging, and tuning high-performance low latency concurrent Java applications. This is the reason, it is one of the most important topics in Java interviews. Multithreading and concurrency are also hard to master the concept and only good developers with solid experience can effectively deal with concurrency issues.

Inter Thread Communication in Java using wait() and notify() - Example Tutorial

Wait and notify methods in Java are used for inter-thread communication i.e. if one thread wants to tell something to another thread, it uses notify() and notifyAll() method of java.lang.Object. A classical example of the wait and notify method is a Producer-Consumer design pattern, where One thread produces and put something on the shared bucket, and then tell the other thread that there is an item for your interest in a shared object, consumer thread than pick than item and do his job, without the wait() and notify(), consumer thread needs to be busy checking, even if there is no change in the state of the shared object.

How to use Lock in Java? ReentrantLock Example Tutorial

Many Java programmers confused themselves like hell while writing multi-threaded Java programs like where to synchronized? Which Lock to use? What Lock to use etc. I often receive a request to explain how to use Locks and ReentrantLock in Java, so I thought to write a simple Java program, which is multi-threaded and uses a rather new Lock interface and ReentrantLock to lock critical section. Remember Lock is your tool to guard shared resources which can be anything like a database, File system, a Prime number Generator, or a Message processor. Before using Locks in the Java program, it’s also better to learn some basics. Lock is an interface from java.util.concurrent package. It was introduced in JDK 1.5 release as an alternative to the synchronized keyword.

Difference between Executor, ExecutorService and Executers class in Java

All three classes Executor, ExecutorService, and Executors are part of Java's Executor framework which provides thread pool facilities to Java applications. Since the creation and management of Threads are expensive and the operating system also imposes restrictions on how many Threads an application can spawn, it's a good idea is to use a pool of threads to execute tasks in parallel, instead of creating a new thread every time a request comes in. This not only improves the response time of the application but also prevent resource exhaustion errors like "java.lang.OutOfMemoryError: unable to create new native thread".

Difference between @Transactional and @EnableTransactionManagement in Spring Boot

Any enterprise program that deals with data storage and retrieval must incorporate transaction management. Annotations like @Transactional and @EnableTransactionManagement in Spring make it simpler to manage transactions. Although both of these annotations support transaction management, there are some important distinctions between them that programmers must be aware of in order to use them properly. The distinctions between @Transactional and @EnableTransactionManagement in Spring will be covered in this post, along with examples to guide your decision-making.

What is CyclicBarrier in Java? How and When to use CyclicBarrier with Example? Tutorial

What is CyclicBarrier in Java

CyclicBarrier in Java is a synchronizer introduced in JDK 5 on java.util.Concurrent package along with other concurrent utility like Counting Semaphore, BlockingQueue, ConcurrentHashMap, etc. CyclicBarrier is similar to CountDownLatch which we have seen in the last article  What is CountDownLatch in Java and allows multiple threads to wait for each other (barrier) before proceeding. The difference between CountDownLatch and CyclicBarrier is also a very popular multi-threading interview question in Java. CyclicBarrier is a natural requirement for a concurrent program because it can be used to perform the final part of the task once individual tasks are completed.