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Learn about HashMap internal working, Hashing, Re-Hashing, Node usage in HashMap, and Node structure in Java. HashMap node structure To define the map’s entries, HashMap uses the Node<K,V> class, which is a static inner class. It is not incorrect to state that each element in the HashMap is a node. static class Node<K,V> implements Map.Entry<K,V>…
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Let’s look at the differences between Sequential and parallel stream in Java 8, as well as when to use parallel streams in Java 8. Sequential stream is based on a single core and works similar as for loop. Parallel stream makes use of the computer’s numerous cores and divides the job into multiple subtasks, each…
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The Stream.map() function in Java 8 converts a stream to another form. The java Stream.map() acts as a bridge between two operations. In other words, it is an intermediate operation. The map() accepts an input stream and returns a result to a stream which is sent the output stream. If we have a type X…
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Fork/Join allows us to divide the task into smaller pieces and combine the results. It uses Work-stealing algorithm. If more than one thread is working at the same time, and one thread completes its job while the other thread remains busy, the completed thread steals the tasks from the busy thread and begins working on…
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Several new features have been added to Java 11 to assist developers in avoiding boilerplate code and improving readability. Java 11 is the first Long Term Support (LTS) version following Java 8. Oracle discontinued supporting Java 8 in January 2019. Oracle, as we all know, releases a new Java version every six months. Java is…
Runnable and Callable are both useful for implementing multithreading. Runnable has been enhanced into Callable in Java 1.5. It’s important to understand that Tasks that will be executed by other threads are encapsulated using the Callable and Runnable interfaces. The java.util.concurrent package has a Callable. Runnable is available in java.lang.Thread. There are, however, some differences…
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Jenkins is a DevOps tool that is developed in Java and Jenkins is a free and open-source tool for continuous integration and deployment. Jenkins invites the developer to set up a continuous integration/continuous deployment (CI/CD) environment. It has version control technologies like Git, Maven, and others that may be used to control the version. In…
Hi Readers, In this article we have compiled some important and frequently asked questions from Java 8. Java 8 interview questions and answers are available for beginners, those with 5 years of experience, those with 10 years of experience, and those with 12 years of experience. What are some of the new features in JAVA…
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Concurrent collections in Java are designed with the goal of allowing many threads to access the same data in a synchronized manner. If you’re familiar with Java Collections, you’re probably aware that most Collection classes aren’t thread-safe by default. Take, for example, Java’s ArrayList, LinkedList, HashMap classes. We must manually make the collection thread-safe if…
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Lambda expressions aided the developer in simplifying the development process. The lambda expression is important feature of Java 8. This functionality is highly useful in collections for iterating and filtering the data. It does not have a return type or even a method name, and it does not specify accessibility. Classes and objects are given…
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